Dome CXtra User Manual

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Dome® CXtra

User’s Guide

™

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This document contains proprietary information of NDS Surgical Imaging. It is exclusive property of NDS Surgical Imaging. It may not be reproduced or transmitted, in whole or in part, without a written agreement from NDS Surgical Imaging. No patent or other license is granted to this information.

The software, if any, described in this document is furnished under licensed agreement. The software may not be used or copied except as provided in the licensed agreement.

NDS Surgical Imaging provides this publication as is without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability or fitness for a particular purpose. NDSsi may revise this document from time to time without notice. Go to web site www.ndssi.com for the latest documentation. Some states or jurisdictions do not allow disclaimer of express or implied warranties in certain transactions; therefore, this statement may not apply to you.

Information in this document about products not manufactured by NDS Surgical Imaging is provided without warranty or representation of any kind, and NDS Surgical Imaging is not be liable for any damages resulting from the use of such information.

020-09

11 Rev03A

NDS Surgical Imaging, NDS Surgical Imaging logo, Dome, Dome by NDSsi logo, Dome CXtra, DICal, RightLight, Dome Dashboard, and all Dome display names are either registered trademarks or trademarks of NDS Surgical Imaging. All other trademarks are the property of their respective owners.

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Contents

What’s New in Version 6.x Series 1 Getting Started 5

Display Compatibility 5 CXtra Services 6 System Requirements 8 Installing the Dome CXtra Software 8 Installing or Removing Services 9 Installing the Photometer 10 Starting Dome CXtra 12 Opening the CXtra Services Menu 13 CXtra Utilities 14 Exiting Dome CXtra 14 Uninstalling Dome CXtra 14

RightLight Service 15

Configuring the RightLight Service 17 Running Conformance Tests 28 Checking Current Conformance Status 35 Reviewing Conformance Events 36 Reviewing Manual Conformance Data 37 Disabling RightLight Popup Warnings 42

White Level Calibration Service 44 MQSA Quality Control Tests 48

Scope 48 Materials/Equipment 48 Configuring MQSA Test Reminders 50 Configuring the Warning Light Indicators 52 MQSA Test Wizard 54 Running the Daily Quality Control Test 56 Running the Monthly Quality Control Test 60

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DICal Service 81

Configuring the DICal Service 82 Using DICOM Response Function as Default Calibration 83 Choosing Display Calibration 84 Performing a Custom DICOM Calibration 85 Reviewing Calibration Events 87 Performing a Conformance Test 88 Reviewing Conformance Test Data 88 Reviewing Conformance Test Events 92 Advanced Options 94

Test Patterns Service 96

AAPM TG18 Test Patterns 96 Miscellaneous Test Patterns 96 Displaying Test Patterns 99 Adding a Custom Test Pattern 100 Modifying or Deleting Custom Test Patterns 102 Dome Visual and Interactive Evaluations 102

Backlight Saver Service 108 DIN Test Service 111

Setting Up for Testing 112 Running a DIN Acceptance Test 122 Running a DIN Constancy Test 123 Viewing DIN Test Results 125

AAPM TG18 Test Service 126

AAPM TG18 Test Setup 128 Completing AAPM TG18 Tests 134 Viewing AAPM TG18 Test Results 136

Privilege Service 138 Reporting Service 140 Enterprise Management Service 146 Troubleshooting 155 Appendix 156 Index 160

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What’s New in Version 6.x Series

Menu Update

Reporting Control has been changed to CXtra Preference. This command change appears on the Cxtra Services menu and on the related dialog. Use this dialog to disable the beeping sound that occurs with some software functionality.

Front Sensor Scheduling

The functionality for specifically scheduled front sensor testing has been eliminated. You can elect to run front sensor testing automatically and manually. Automatic testing occurs each day.

Dome Displays

Dome CXtra support has been added for the Dome GX4MP display, a 4-megapixel color unit with DVI video connectivity.

Support was added in previous versions of Dome CXtra for the GX2MP Plus display, a 2-megapixel color unit with DVI connectivity; Dome E3cHB and Dome S3c displays, both 3-megapixel color units, and Dome S3, a 3-megapixel grayscale unit, all with DVI and DisplayPort video connectivity; and the Dome S10 display, a 10-megapixel grayscale unit with video input via DVI connectivity.

MQSA Test Service

You can set up test reminders for consistent quality control activity and record the results of the quality control tests electronically. NOTE: Applies to Dome E5 and Dome S10 displays only.

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Expansion of Manual Conformance Testing

With the addition of the front sensor on some models of Dome displays, the Manual Conformance functionality has been bifurcated into the External Sensor Conformance testing (using the photometer device) and the Front Sensor Conformance testing.

External Sensor Conformance replaces Manual Conformance on the CXtra Services menu and the Conformance wizard. All operational procedures are unchanged.

Front Sensor Conformance has been added to the menu. With this functionality you can perform auto and manual conformance testing. NOTE: Applies to Dome S3, Dome S3c, and Dome S10 displays only.

White Level Maximum Limit Exceedance

If you have a requirement to exceed the maximum limit of the preset White Level target range, you can now do so but your display warranty becomes void. Contact NDSsi Customer Care for more information.

European Reference Guidelines

The EUREF guidelines, organized by the European Reference Organization for Quality Assured Breast Screening and Diagnostic Services, promotes mammography care of high quality in European Union member states. Users of Dome displays qualified for AAPM TG18 can perform the White Level Calibration procedure to meet this standard. See “White Level Calibration Service” on page 44.

Modification of Color Calibration Setting

Only an administrator, not privileged users, can modify the color calibration setting accessible on the RightLight Panel Configuration dialog, Color tab. (See page 22.)

NOTE: Applies only to Dome displays using the RightLight functionality.

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Windows Platform Support

Support is available for the Microsoft Windows 7 (x86 or x64) and Windows Server 2008 R2 (x64 only) operating systems.

Support for the Microsoft Windows XP x64 operating system was

added to the Dome

CXtra™ 6.x series in an earlier version.

CXtra Utilities

Users can start, restart, and stop all CXtra services and application, and run CXtradiag with utilities. Access the tools via the Windows Start menu.

NOTE: Windows administrator privilege is required to run the utilities. Users without privilege must enter an authorized username and password as prompted.

Fast User Switching

The Fast User Switching feature is not supported on display systems using NVIDIA drivers previous to version 197.03.

Installation Upgrades

The installation procedure for Dome CXtra is now simpler, faster, and more reliable. All services and features are installed by default. To customize your installation, you must deselect the service or application feature you do not wish to install.

White Level Calibration

Correction of the display white level can now be done via manual conformance testing or with the White Level Calibration service.

A one-time, end-user calibration of the white level may be necessary when the target luminance is outside the tolerance established for proper display conformance, such as when the white level of a display has failed a manual conformance test, or when two or more displays in a multi-unit configuration show disparate white levels. An external photometer is required.

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NOTE: Privileged users and administrators can calibrate the white level if a display fails the White Level test during the manual conformance testing. Only administrators can calibrate the white level via the White Level Calibration service.

Support for 10-Bit Displays

You can now run the Dome CXtra software on Dome 10-bit grayscale displays. You can check for 10-bit capability (both current and maximum supported) on the Properties tab of the Reporting dialog. You can also view 10-bit patterns (horizontal ramp and vertical ramp test patterns) using the Test Patterns service. And in manual external sensor conformance testing, you can take all 1024 measurements for more precise testing results.

Using Dome CXtra with Dome Dashboard

For best practice of using Dome Cxtra 6.x with Dome Dashboard 2.x, observe the following requirement and recommendation.

• When using Dome Dashboard 2.x, make sure that Dome CXtra 6.x or later is installed on each CXtra workstation.

• On the CXtra workstation, limit the retention of history to 365 days (one year).

Single Dome CXtra Package

The separate packaging of the Enterprise Management Service has been discarded. All CXtra services, including the Enterprise

Management Service, are now available in a single CD package.

Dome CXtra Limitation

When using a display configuration with the NVIDIA 1800 board in Windows XP Span mode, the only video connection supported is two (2) DisplayPort-to-DVI adapters.

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Getting Started

The Dome CXtra software adds essential functionality to Dome medical imaging display systems in diagnostic and referral settings. By using the Dome CXtra suite of value-added services, you can calibrate and maintain displays, run acceptance tests, and monitor displays remotely. While the services operate as independent plugins, they each use the Reporting service for listing properties, logging events, and saving history.

Display Compatibility

CXtra services enhance the functionality of these display systems:

•Dome Cx

•Dome Ex

•Dome Gx

•Dome Sx

• Select Desktops

You can also install the Dome CXtra software on systems using third-party commodity monitors to enable DICOM calibration. See “Enabling DICOM Calibration on Third-Party Monitors” on page 95.

NOTE: When you add or remove displays on the Windows desktop, you must restart the Dome CXtra software by rebooting the system. (Refer to ReadMe file for more information.)

WARNING: When the Dome CXtra application is running on the system, power off the workstation before you either connect a DVI cable to or disconnect a cable from the Dome display. Connecting or disconnecting a DVI cable with the workstation power on may corrupt the display EDID data.

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CXtra Services

The following services constitute the Dome CXtra software.

RightLight™ – Assures backlight stabilization for your display panel, calibrates your panel to the DICOM Grayscale Standard Display Function, automatically tests the calibration for conformance, allows manual conformance testing, and supports DICOM calibration at various color coordinates on Dome color displays. (Manual external sensor conformance testing requires the LCD or the LCD II photometer. Use only the LCD II photometer with Dome color displays.)

White Level Calibration – For displays using the RightLight service, calibrates the display photometer that stabilizes the white level. (Calibration of the white level requires the LCD or the LCD II photometer. Use only the LCD II photometer with Dome color displays.)

DICal™ – Calibrates your display panel to the DICOM Grayscale Standard Display Function, tests the calibration for conformance, and allows the selection of individual displays to run the service at any given time. (Custom calibration and manual external sensor conformance testing require the LCD or LCD II photometer.)

Backlight Saver – Extends the clinical life of your display by turning off panel backlights during periods of inactivity you define.

MQSA Tests – Provides procedures for daily tests, monthly tests, and quality control tests for medical physicists (quarterly, biannually, or annually) to support consistent image quality and constant display maintenance in accordance with the Mammography Quality Standards Act. Available for Dome E5 and Dome S10 displays only.

Test Patterns – Provides test images and allows use of custom test patterns for demonstrating and evaluating the performance of your display.

AAPM TG18 – Performs flat panel evaluations recommended by the American Association of Physicists in Medicine, Task Group 18.

DIN Test – Tests your display for compliance with German standard DIN 6868-57.

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Privilege – Password-protects operating parameters of the display system.

Reporting – Collects, displays, and prints configuration data, characteristics, and event logs created by most other services.

Enterprise Management – Manages displays from a central location. Requires SNMP console (not provided) for remote viewing.

The use of CXtra services is display-dependent. Check the following table for display compatibility by service:

Dome Cx, Dome Ex,

CXtra Service

Dome GX4MP &

Dome Sx

GX2MP &

GX2MP Plus

Select

Desktop

RightLight

White Level Calibration

MQSA Testing

DICal

Backlight Saver

Test Patterns

AAPM TG18

DIN Test

Privilege

Reporting

Enterprise Management

†

999

* Restoration of factory White Level calibration available only on

Dome Ex, Dome GX4MP, and Dome Sx displays.

† Service applies to Dome E5 and Dome S10 displays only.

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System Requirements

The Dome CXtra software requires one of these operating systems:

• Windows 7 (x86 or x64)

• Windows Server 2008 R2 (x64 only)

• Windows XP Professional (x86 or x64), Service Pack 3

Installing the Dome CXtra Software

NOTE: Install the Dome CXtra software to a local disk drive only. The software may not work properly if any components are installed on a network drive.

To install the Dome CXtra software

1 Log onto Windows with administrator privileges.

2 Insert the installation CD and run setup.exe.

3 Follow the wizard instructions to complete the installation.

FIRST-TIME INSTALLATION: By default, all services are selected for installation. To customize your installation, deselect the services you do not wish to install.

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UPGRADE INSTALLATION: To upgrade to package 6.0.1 or later, insert the installation CD and run setup.exe. Follow the wizard instructions to complete the installation. Services that have been modified since the previous release are upgraded.

The application starts when the installation is finished. The Dome CXtra icon appears on the Windows taskbar. The check mark indicates that the application is running successfully.

Installing or Removing Services

You can add a service individually if you do not install it during the initial installation. You can also delete a single service as necessary.

To install or remove an individual service

1 Log onto Windows with administrator privileges.

2 Insert the installation CD and run setup.exe.

3 Follow the wizard instructions to the Modify, Repair, or

Remove dialog.

4 Select and deselect the service to be installed or removed.

5 Follow the wizard instructions to complete the installation or

remove the service.

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Installing the Photometer

To use the RightLight and DICal custom calibration and conformance test features, you must purchase and install the optional LCD or LCD II photometer. (Only the LCD II photometer is RoHS compliant.)

NOTE: The LCD II photometer is required for use with Dome color displays.

Use the following instructions to install the photometer correctly per your operating system.

To install the photometer on Windows 7/Windows Server 2008 R2

1 Log onto Windows with administrator privileges.

2 Plug the photometer into an available USB slots on the system.

3 Go to the Control Panel and select System and Security. Next,

select System from the options. Then, on the next screen, select Device Manager in the left pane.

4 In the Device Manager dialog, expand Other device. Right-click on

the Calibrator node, and select Update Driver Software.

5 In the Update Driver Software dialog, select Browse my computer

for driver software, and browse to <cxtra install directory>\ USBx64Driver for 64-bit operating systems. Or, browse to <cxtra install directory>\USBDriver for 32-bit operating systems.

6 Click Next to start the driver installation. When finished, close

the dialog to use the photometer.

Note the following:

• The Device Manager can also be launched by running devmgmt.msc.

• Default <cxtra install directory> on the 32-bit operating system is C:\Program Files\NDSsi\CXtra.

• Default <cxtra install directory> on the 64-bit operating system is C:\Program Files (x86)\NDSsi\CXtra.

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To install the photometer on Windows XP

1 Log onto Windows with administrator privileges.

2 If necessary, install the Dome CXtra software. (See page 8.)

3 Connect the photometer to a USB port on the computer.

The operating system detects the new hardware and opens the Found New Hardware Wizard.

NOTE: If you connect the photometer to a USB hub and the Found New Hardware Wizard does not appear, connect the photometer directly to a USB port on the computer.

4 Follow the wizard instructions until a window prompts you to select

a driver for the device.

5 Select Search for a suitable driver for my device and click Next.

6 Select Specify a location and click Next.

7 Navigate to the folder on your hard drive containing the

photometer driver. If you accepted the default location during installation, the driver is stored in this folder: C:\Program Files\NDSsi\CXtra\USBDriver

8 Click Next to install the driver.

9 Click Finish to complete the installation.

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Starting Dome CXtra

The Dome CXtra application starts automatically when you run your computer. If you exit the application or if it stops running for any reason, restart it by selecting Windows Start > All Programs > NDSsi > CXtra.

A Dome CXtra status icon appears on the Windows taskbar to indicate application status. The Success icon shows that the display is operating normally. The Wait icon appears the application is starting up or restarting from a stop. If the Warning or System Error icon appears, check the History tab in the Reporting service and troubleshoot the error. See “Reporting Service” on page 140 for detailed information.

Dome CXtra Icon Status

Success

Wait

Warning

System Error

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Opening the CXtra Services Menu

All Dome CXtra functions are accessible from the services menu. This graphic shows the default menu entries for standard services.

To open the menu, click the Dome CXtra icon on the Windows taskbar. If the Dome CXtra icon is not visible on the Windows taskbar, open the menu by Windows Start > All Programs > NDSsi > CXtra.

The menu is expanded to show the White Level Calibration service when the user is logged on as administrator. For more information, see “White Level Calibration Service” on page 44 and “Logging On as Privileged User/Administrator” on page 138.

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CXtra Utilities

The following utilities have been added to the application. CXtra Start Launch the application and all CXtra services

CXtra Diag Create Cxtradiag package

CXtra Restart Resume application operation and all CXtra services

CXtra Stop Terminate the application and all CXtra services

To access a utility, click Windows Start > All Programs > NDSsi > CXtra Utilities, then select one of the four options.

NOTE: Windows administrator privilege is required to run the utilities. Users without privilege must enter an authorized username and password as prompted.

Exiting Dome CXtra

If you need to exit (close) the application, open the CXtra Services menu and select Exit.

NOTE: Exiting from Dome CXtra may require a password. See “Privilege Service” on page 138 for more information.

Uninstalling Dome CXtra

Use this procedure to uninstall the entire Dome CXtra application.

To uninstall the entire application

1 Log onto Windows with administrator privileges.

2 Select Windows Start > Settings > Control Panel > Add/Remove

Programs to view a list of installed applications.

3 To uninstall the entire application, select CXtra.

4 Click Change/Remove to start the uninstall process. A message

prompts you to restart the computer.

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RightLight Service

The RightLight service performs backlight stabilization, DICOM calibration, automatic conformance testing, and manual conformance testing via an external photometer for Dome Cx, Dome Ex, Dome GX4MP, and Dome Sx displays. Manual conformance testing via the display front sensor is available for Dome Sx units.

With RightLight, you can set a target white level, equalize the black level across the displays, set a desired response function, and specify ambient light in the viewing area. This service also reports current white and black levels.

RightLight automatically calibrates the displays at regular intervals. Calibration adjusts the response of a display to conform to the response function you specify. There are four calibration response functions, one of which is a correction to the DICOM Grayscale Standard Display Function.

DICOM calibration is based on the unique characteristic curve stored in each display at the time of manufacturing. RightLight routinely checks how well each display conforms to the DICOM standard and calculates a Luminance Uniformity Metric (LUM) value that indicates the degree of conformance.

Besides the automatic conformance testing and adjustment that RightLight performs regularly, you can perform manual external sensor conformance testing, using an optional photometer. On Dome Sx displays, you can also perform manual conformance testing with the embedded front sensor photometer.

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You can also calibrate the internal RightLight photometer to generate a new calibration data file whenever the white level is outside the tolerances set for the display configuration. Calibrating the white level requires an external photometer.

For Dome Ex, Dome GX4MP, and Dome Sx color displays, you can set color coordinates for panel appearance in one of two ways:

• Select an option for panel appearance with blue, clear, or default.

• Use the LCD II photometer to perform color calibration when you specify color coordinates by color temperature (Kelvin scale) or by CIE xy coordinates.

NOTE: Setting nondefault color coordinates can change the target luminance range.

CXtra Services menu, and commands of the RightLight Conformance submenu

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Configuring the RightLight Service

If the Privilege service has been installed, you must log on as a privileged user to change the RightLight configuration. (See page 138.)

To configure the RightLight service

1 Open the CXtra Services menu and select RightLight Panel

Configuration. The RightLight Panel Configuration dialog appears with these tabs:

• Backlight

•Calibration

•Ambient

• Color

• Front Sensor

• Rear Sensor

• External Sensor

2 Check the selection box for each display you want to configure, or

click Select All.

3 Select a tab and change the settings as described in the following

sections. Click Apply to activate the changes without closing the dialog; click OK to activate the changes and close the dialog.

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Backlight tab

For displays selected, you can view the values of these parameters:

• Black level, in cd/m

• White level, in cd/m2

• Backlight use, in hours

• Brightness, as a percentage of maximum effective brightness

In the White Level field, type the target white level value (in cd/m

) or use the arrow keys to change the value shown. Click Apply or OK. NOTE: White Level values are limited to the upper and lower ranges specified per display.

RightLight stabilizes the backlights of selected displays to attain the target white level. Your system may require several moments for the white level to stabilize after adjustment. Below are the default target

white level at native color coordinates of Dome display models.

Display Default Target White Level

Dome C2 600 cd/m

Dome C3 600 cd/m

Dome C3i 600 cd/m

Dome C5 400 cd/m

Dome C5i 500 cd/m

Dome E2 600 cd/m

Dome E2c 400 cd/m

Dome E2cHB 500 cd/m

Dome E3 600 cd/m

Dome E3c 300 cd/m

Dome E3cHB 500 cd/m

Dome E4c 250 cd/m

Dome E5 500 cd/m

Dome GX4MP 250 cd/m

Dome S3 600 cd/m

Dome S3c 500 cd/m

Dome S10 600 cd/m

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NOTE: If you set the white level too close to the maximum brightness capability of the display, frequent warnings on high white levels may appear. To correct this problem, reduce the white level setting on the Backlight tab until the warnings stop appearing or use the CXtra Preference dialog to disable the warning popups. If you have a requirement to exceed the maximum limit, you can do so but you void your display warranty. Contact NDSsi Customer Care for instructions.

Dome CXtra gives you three options for controlling dynamic range.

• Maximize - Causes each selected display to be calibrated using its full

dynamic range. The range of the selected displays may differ.

• Equalize - Causes all selected displays to be calibrated using the same

dynamic range. The system locates the selected display that has the smallest dynamic range and adjusts the range of the other selected displays to match it.

• Specify - Causes all selected displays to be calibrated using the

specified dynamic range. The system notifies you if any of the selected displays cannot achieve the specified range.

If all the selected displays have similar dynamic range, there may be little or no visual difference among the selections.

The black levels and white levels shown on the Backlight tab include the ambient light level specified on the Ambient tab. NOTE: Choosing the Native or the No RightLight Calibration option on the Calibration tab or on the services menu prevents RightLight from equalizing black levels. When you do this, you are no longer applying DICOM calibration.

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Calibration tab

Select one of these response functions for auto-calibration:

• DICOM Response Function (default) – Calibrates to the DICOM

Grayscale Standard Display Function. See DICOM PS 3.14-2000 (Digital Imaging and Communications in Medicine (DICOM), Part 14: Grayscale Standard Display Function).

• Exponential (log linear) Response Function – Calibrates to an

exponential (log linear) response function. The logarithm of the luminance is a linear function of the digital driving level.

• Native Response Function – Automatically sets the flat panel to its

native response function (characteristic curve). The characteristic curve is the response function of the panel with no calibration applied. This is the display function created by loading a linear gamma correction table, or GCT.

• No RightLight Calibration – Turns off auto-calibration. Choose this

response function if you are using an external calibration product such as the Dome Calibration TQA™ system. Dome CXtra retains GCTs currently set or created by an external calibration. RightLight stabilizes the backlights only.

CAUTION: Do not calibrate with an external calibration product, such as the Dome Calibration TQA system, unless your response function is set to No RightLight Calibration. Otherwise, RightLight overwrites the gamma correction table.

Check the selection box for each function you want to place on the services menu, then change the operating parameter via the menu.

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Ambient tab

Specify the ambient light in the viewing area. Select the ambient light description that best fits the display location:

• Low (reading room - 0.20 cd/m

• Moderate (typical office - 0.80 cd/m

• High (brightly lit office - 1.50 cd/m

• Custom – Fill in a value ranging from 0.00 (default) to 5.00 cd/m

The RightLight service allows you to enter luminance in cd/m resulting from the diffuse reflection of ambient illuminance. Since typical Dome panels have a reflectance of 1.25%, given

illuminance E in lux, you can calculate the luminance in cd/m using this equation:

)

luminance = 1.25% × E /

The default values are typical of reading rooms (approx. 50 lux), moderately bright offices (approx. 200 lux), and brightly lit offices (approx. 375 lux).

NOTE: Choosing the Native or the No RightLight Calibration option on the Calibration tab or on the services menu prevents RightLight from correcting for ambient light. When you do this, you are no longer applying DICOM calibration.

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Color tab

Specify the panel appearance of Dome Ex, Dome GX4MP, and Dome Sx color displays, with or without calibration.

Appearance. Use options in the Appearance field to specify blue, clear, or default when you do not color-calibrate the display panel.

Calibrated color coordinates. Use options in the Calibrated Color Coordinates field for precise specification of color coordinates. Apply this method, for example, with multiple displays when a discrepancy appears in color matching after you have selected an option in the Appearance field.

NOTE: Only an administrator, not privileged users, can modify the color calibration setting. The functionality is enabled only when the administrator is logged onto the system.

First, click Color Calibrate to run the calibration wizard. Next, test and accept the calibration. Then, set the color temperature by Kelvin scale (from 5000 to 12000) or specify the CIE xy coordinates. Click Apply or OK to finish.

NOTE: The LCD II photometer is required for color calibration of the Dome color displays.

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Front Sensor tab

Specify the front sensor conformance test(s) you want RightLight to run. You can schedule testing to run automatically each day and conduct testing manually.

RightLight alerts you of a failure in these three ways: by message, by entries in the History log, and by status change of the Dome CXtra icon in the system tray. If the CXtra-enabled workstation is connected to Dome Dashboard, an alert is also sent to the Dashboard app or SNMP console.

To set auto alert parameters

Click the selection box for the automatically scheduled and manual tests you want to run.

• For the RightCheck White Level test, enter a value for Tolerance ±.

Then check the scheduled or manual selection box, or both, for test alerts. The RightCheck White Level test is classified a failure if the measured white level is outside the range defined by this percent, applied to the Target Luminance defined on the Backlight tab. Enter a value ranging from 0 (zero) to 25 (default = 10.00). Tests producing a white level value outside of this percentage range generate a warning message.

EXAMPLE: Target white level: 600 cd/m

Tolerance: ±10% Result: Values outside the range from 540 to 660 (600 ± 60 cd/m

) indicate a test failure.

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• For the DICOM LUM test, enter a value for Maximum allowed.

Then check the scheduled or manual selection box, or both, for test alerts. The DICOM LUM test is classified a failure if it produces a value greater than the maximum allowed. Enter a value ranging from 0 (zero) to 2 (default=1.00). A value of 0 (zero) indicates perfect conformance with the DICOM Grayscale Standard Display Function. The DICOM LUM Test assesses the standard deviation of JNDs (Just Noticeable Differences) per digital interval.

EXAMPLE: Maximum allowed: 1.00 Result: A test result of 0.421 passes, because it is less than 1.00.

Enter the number of measurement you want the system to take for this test. For the front sensor, the default number of measurements is 15; the minimum,5; the maximum, 32 (All).

If you run the Front Sensor Conformance Wizard with the selection boxes unchecked for both the DICOM LUM test and the White level test, you are logging the data from a completed conformance test without applying the criteria of the DICOM LUM and White Level tests for Pass/Fail determination.

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Rear Sensor tab

Specify the conformance test(s) you want RightLight to run. Every 5 minutes, RightLight automatically performs the tests selected on this tab. For each test you select, you can specify a threshold value that defines a test failure. RightLight alerts you of a failure in these three ways: by message, by entries in the History log, and by status change of the Dome CXtra icon in the system tray. If the CXtraenabled workstation is connected to Dome Dashboard, an alert is also sent to the Dashboard app or SNMP console.

To set alert parameters

1 For the rear (backlight) sensor, select either the RightLight White

Level test or the DOICOM LUM test, or select both.

For the RightLight White Level test, check the selection box. Then enter a value for Tolerance ±. The RightLight White Level test is classified a failure if the measured white level is outside the range defined by this percent, applied to the Target Luminance defined on the Backlight tab. Enter a value ranging from 0 (zero) to 25 (default = 10.00). Tests producing a white level value outside of this percentage range generate a warning message.

EXAMPLE: Target white level: 600 cd/m

Tolerance: ±10% Result: Values outside the range from 540 to 660 (600 ± 60 cd/m

) indicate a test failure.

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For the DICOM LUM test, check the selection box. Then enter a value for Maximum allowed. The DICOM LUM test is classified a failure if it produces a value greater than the maximum allowed. Enter a value ranging from 0 (zero) to 2 (default=1.00). A value of 0 (zero) indicates perfect conformance with the DICOM Grayscale Standard Display Function. The DICOM LUM Test assesses the standard deviation of JNDs (Just Noticeable Differences) per digital interval.

EXAMPLE: Maximum allowed: 1.00 Result: A test result of 0.421 passes, because it is less than 1.00.

2 In the Log interval section, enter a time interval and starting time

for the first daily test in the hours starting at field. RightLight logs the first set of conformance tests at the time specified and at regular intervals thereafter until the end of the day.

Enter a positive integer for hours and a time in the 24-hour format, such as 13:30. This interval specifies how often the system logs the results of the selected test(s).

When a selected test fails, a message appears and the CXtra icon changes to indicate a warning state. View the test results in the Reporting History log.

NOTE: The log interval and start time must apply to all displays. These fields are not enabled unless all displays are selected.

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External Sensor tab

Specify the external sensor tests that you want to complete manually. For each manual test that you select, you can specify a threshold value that defines a test failure. When a failure occurs, the CXtra icon is set to a warning state. In addition, if the CXtra-enabled workstation is connected to Dome Dashboard, an alert is also sent to the Dashboard app or SNMP console. Selections made on this tab determine operating parameters for the Conformance Wizard, which guides the manual test.

To set alert parameters

1 Select either the RightLight White Level test or the DICOM LUM test

or both, for external sensor conformance testing.

• RightLight White Level test. Check the selection box, then enter a value for Tolerance ±. The RightLight White Level test is classified a failure if the measured white level is outside the range defined by this percent, applied to the Target Luminance defined on the Backlight tab. Enter a value ranging from 0 (zero) to 25 (default =10.00).

• DICOM LUM test. Check the selection box, then enter a value for Maximum allowed. The DICOM LUM test is classified a failure if it produces a value greater than the maximum allowed. Enter a value ranging from 0 (zero) to 2 (default=1.00). A value of 0 (zero) indicates perfect conformance with the DICOM Grayscale Standard Display Function.

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2 Select the number of luminance measurements you want

to make during each manual test.

Note: For the external sensor, the default number of measurements is 15. When you select All, 256 measurements are taken on 8-bit display systems; 1024 measurements are taken on 10-bit systems.

If you run the External Sensor Conformance Wizard with the selection boxes unchecked for both the DICOM LUM test and the White Level test, you are logging the data from a completed manual conformance test without applying the criteria of the DICOM LUM and White Level tests for Pass/Fail determination.

Running Conformance Tests

After you configure the RightLight service, the conformance tests that you specified on the Front Sensor, Rear Sensor, and External Sensor tabs are set to run. That is, per your selections, RightLight performs White Level tests or DICOM LUM tests or both where auto and manual alerts are set accordingly for front, rear, and external sensor

conformance testing.

ALERT

Auto

> White Level > DICOM LUM

Auto-scheduled

> RightCheck White Level > DICOM LUM

Manual

> White Level > DICOM LUM

Front

Sensor

Rear

Sensor

External

Sensor

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Checking Conformance via the Front Sensor

Front sensor conformance tests are run per criteria you input for auto-scheduled or manual testing.

If you have the Privilege service installed, you must log on as a privileged user before you run a front sensor conformance test. (See page 138.)

To run the Front Sensor Conformance Test on demand, open the CXtra Services menu, select RightLight Conformance > Front Sensor Conformance Test. The test dialog appears onscreen while the conformance check is in progress.

The next dialog indicates test results. View the report or click Finish. Anytime later you can view results by opening CXtra Services menu > Reporting > History tab or CXtra Services menu > RightLight Conformance > Conformance History.

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Auto Conformance Testing via the Rear Sensor

Automatic conformance testing shows how well your display conforms to the DICOM standard. RightLight automatically performs the tests selected on the Rear Sensor tab every 5 minutes. See page 25 to view or modify the test parameters.

If you have the Privilege service installed, you must log on as a privileged user before you set up auto conformance testing. (See page 138.)

Checking Conformance via the External Sensor

If you have configured RightLight properly and have an external photometer installed, you can run a manual external sensor conformance test.

If you have the Privilege service installed, you must log on as a privileged user before you run a manual conformance test. (See page 138.)

As with automatic conformance testing, the manual conformance test shows how well your display conforms to the DICOM standard. You are able to specify, however, the number of measurements to be taken. See “External Sensor tab” on page 27 for configuration information. See “Installing the Photometer” on page 10 for how to install the photometer.

Before starting a manual conformance test, select Dome RightLight DICOM Calibration on the services menu.

NOTE: If you run a conformance test with another response function (such as Dome RightLight Exponential Calibration or Dome RightLight Native Calibration), the system presents a warning message. Continuing to run the test causes the system to show the CXtra icon in the warning state.

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To run an external sensor conformance test

1 Open the CXtra Services menu. Select RightLight Conformance >

External Sensor Conformance Wizard.

2Click Next to continue.

3 Click Initialize RightLight Panels. Upon completion of the process,

click Next to proceed.

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4 Put the photometer on the target and click Measure.

If the White Level is unaligned with the target by 15 percent or more, a warning dialog appears. You can choose to perform White Level calibration to the target, ignore the warning and continue the measurement of conformance data, or direct the Conformance Wizard to skip the display panel, redo the initialization, or close.

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5 Upon successful completion of the conformance measuring, as

indicated by the Success icon, click Next. You have the option to view the report via this dialog.

6 Click Finish to close the wizard.

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After you close the Conformance Wizard, RightLight enters the event in both the Reporting History log and the Conformance History log. All RightLight history events from conformance tests are recorded in the Reporting History log. RightLight provides additional information on conformance events in graphical and tabular formats in the Conformance History log.

If the manual conformance test produces a warning condition because the white level is beyond the tolerance set on the External Sensor tab (page 27), then you can correct the warning by calibrating the white level via the conformance test. Select the check box to correct the warning, and click Next. The wizard executes automatically.

Alternatively, you can adjust the tolerance for the failing test to bring the display into conformance. (See also “White Level Calibration Service” on page 44.)

NOTE: White Level calibration during conformance testing is available only for Dome Ex, Dome GX4MP, and Dome Sx displays. You must be an administrator or a privileged user to perform a manual conformance test and to calibrate the white level during the manual conformance test.

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Checking Current Conformance Status

To view the results of the latest manual (external sensor or front sensor) conformance test, open the CXtra Services menu. Select RightLight Conformance > Current Conformance Status.

In the same dialog, you can also view the results of the latest automatic (rear sensor) conformance test.

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Reviewing Conformance Events

Dome CXtra polls RightLight automatically for its status every 5 minutes, which causes the user-selected tests to run. The system makes an entry in the Reporting History log by the specified logging interval on the Auto Alerts tab and whenever it detects a status change.

NOTE: When you make changes on the Rear Sensor tab, conformance tests run immediately. When you perform a manual conformance test, the system also makes an entry in the Reporting History log.

To view a conformance event

1 Open the CXtra Services menu and select Reporting.

2 Click the History tab to view a list of events.

3 Select a conformance test event and click View Detail or double-

click the event to view the conformance test details.

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Reviewing Manual Conformance Data

For manual conformance tests run via the front or external sensor, you can view data in graphical or tabular format by selecting sensor type, display model, and date.

Not the following:

• You must be using a Dome Sx display to view test results from both front and external sensors; select one or both check boxes on the dialog. With a Dome Ex display, all data result from conformance testing with the external (or manual) sensor.

• Auto conformance data cannot be viewed this way.

To see a detailed account of a conformance event

Open the CXtra Services menu and select RightLight Conformance > Conformance History. Then select the Graphs or Tables tab.

Graphs tab

To view or print a conformance test, choose a graph type, display, and selected test date and time to view or print the graphical data. When using multiple displays, choose the individual display for which you want test results from the Display pull-down list. Select a particular conformance test by date and time from the Date pull-down list.

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Graph type

• Response graph. Plots the measured luminance at various driving

levels (P-values). Luminance is shown along the Y axis using a scale that you select from three options: Linear / Lum, Linear / Log Lum, and Linear / JND Lum. The graph consists of the luminance values specified by the DICOM standard and the luminance values measured during the conformance test. The better the data points align with the curve, the better the DICOM conformance.

Default 15 measurements of luminance taken on an 8-bit display

All 1024 measurements of luminance taken on a 10-bit display

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• Conformance graph. Plots Just Noticeable Differences (JNDs) per

luminance interval. The graph shows the mean value for JND/ luminance interval, the DICOM Luminance Uniformity Metric (LUM), and the line of best fit (FIT). These values are useful in quantifying the quality of conformance with the DICOM Grayscale Standard Display Function. The closer the JND values are to the mean line, the better the DICOM conformance. Moreover, the closer the calculated LUM metric is to 0 (zero), the better the DICOM conformance.

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Tables tab

To view or print a conformance test, choose a table type, display, and selected test date and time to view or print the tabular data. When using multiple displays, choose the individual display for which you want test results from the Display pull-down list. Select a particular conformance test by date and time from the Date pull-down list.

Table type

• Response table. Lists the luminance value measured for each

luminance interval in a selected conformance test.

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• Conformance table. Lists the following data values for a test.

– Number of measurements – Mean value of JND/Luminance Interval – Best fit (FIT) line expression – LUM

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• Color table. Lists the following data values by Kelvin scale or

CIE xy coordinates.

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Disabling RightLight Popup Warnings

You can disable all warning message popups related to the RightLight service.

NOTE: Disabling of warning message popups is not recommended. Read the notice on page 43 before disabling any popups.

To disable RightLight popup warnings

1 Open the CXtra Services menu and select CXtra Preference.

2 Check the box in the Disable RightLight Popups field.

3Click OK.

NOTE: The CXtra icon on the Windows taskbar continues to show warning conditions from the RightLight service and RightLight warnings continue to be recorded in the CXtra history log.

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Important notice on disabling RightLight popup messages

WARNING: The Dome CXtra software includes "popup" warning dialogs (popups), which, unless disabled, appear on the operator's display screen under various operational conditions. These warnings include important messages about the performance of the display which may impact the integrity and reliability of the information displayed, such that the accuracy of the radiologist's or other medical user's diagnosis may be compromised. For example, a popup may warn the operator that the display is out of DICOM conformance to ensure an accurate display image. The Dome CXtra software includes a feature that allows the PACS or system administrator to disable the popup feature such that no popups appear on the operator's display screen, even if such popup warning is warranted under the particular operational circumstances.

While Dome provides this feature as a convenience for those who choose not to view popup warnings and, accordingly, agree to assume the risk of any and all consequences of not viewing such messages, DOME DOES NOT RECOMMEND THE DISABLING OF THIS IMPORTANT POPUP SAFETY FEATURE.

LIMITATION OF LIABILITY: BY DISABLING THE POPUP FEATURE, THE CUSTOMER, OWNER AND ANY USER ACKNOWLEDGE THAT SUCH CUSTOMER, OWNER OR USER UNDERSTANDS AND ASSUMES ALL RISKS AND ACCEPTS FULL RESPONSIBILITY FOR ANY HARMS, INJURIES, DAMAGES AND FEES WHICH ARISE OUT OF OR RELATE TO THE ABSENCE OF SUCH POPUP WARNINGS. THESE INCLUDE ALL CONSEQUENTIAL, INCIDENTAL, INDIRECT, SPECIAL, AND PUNITIVE DAMAGES, AS WELL AS ALL ASSOCIATED ATTORNEY FEES, EXPENSES AND COSTS, ARISING OUT OF OR RELATING TO THE NON-USE OF THE POPUP SAFETY FEATURE. FURTHER, SUCH CUSTOMER, OWNER OR USER SHALL INDEMNIFY AND DEFEND DOME AND HOLD DOME HARMLESS FROM ANY AND ALL SUCH HARMS, INJURIES, DAMAGES, AND FEES WHETHER SUCH HARMS, INJURIES, DAMAGES, AND FEES ARISE FROM OR RELATE TO ACTIONS IN TORT (INCLUDING NEGLIGENCE AND STRICT LIABILITY), CONTRACT, STATUTE, OR OTHERWISE, AND DOME'S LIABILITY SHALL BE LIMITED TO THE PRICE PAID FOR THE SUBJECT PRODUCT.

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White Level Calibration Service

The white level of a Dome display is stabilized by the internal RightLight photometer that is calibrated during display manufacture. The White Level Calibration service allows the end user to calibrate the sensor using an external photometer. When the calibration is completed, the new calibration data file is stored in the display.

A one-time, end-user calibration of the white level may be necessary when the target luminance is outside the tolerance established for proper display conformance, such as when the white level of a display has failed a manual external sensor conformance test, or when two or more displays in a multi-unit configuration show disparate white levels. The calibration may also be required for equipment changes, such as when new external photometers are installed at your facility.

IMPORTANT: Only administrators can calibrate the white level via the White Level Calibration service and restore factory calibration.

White level calibration is available for use on all Dome Cx, Dome Ex, Dome GX4MP, and Dome Sx displays. Restoration of the factory white level calibration is available for Dome Ex, Dome GX4MP, and

Dome Sx displays.

European Reference Guidelines

The EUREF guidelines, organized by the European Reference Organization for Quality Assured Breast Screening and Diagnostic Services, promotes mammography care of high quality in European Union member states. Users of Dome displays must start with a unit that meets uniformity standards, such as AAPM TG18, and complete the White Level Calibration procedure on each display system. If one or more displays on a system are replaced or removed altogether, or if an additional display is added to the system, the procedure must be repeated.

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Privileged users can calibrate the white level during manual external sensor conformance testing. For more information, see “To run an external sensor conformance test” on page 31.

When you log on as administrator, the CXtra Service menu expands to include two functions, White Level Calibration Wizard and Restore Factory White Level Calibration. (See “Logging On as Privileged User/ Administrator” on page 138.)

Two additional functions appear on the CXtra Services menu– White Level Calibration Wizard and Restore Factory White Level Calibration–when an administrator is logged on to calibrate the display white level

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Running the White Level Calibration Wizard

IMPORTANT: White level calibration via the White Level Calibration service is available for use on all Dome Cx, Dome Ex, Dome GX4MP, and Dome Sx displays. Restoration of the factory white level calibration is available only for Dome Ex, Dome GX4MP, and Dome Sx displays.

To calibrate the white level

First, open the CXtra Services menu and click White Level Calibration Wizard.

Next, click Yes to proceed in replacing the factory calibration data with the calibration data to be measured at your site.

Then, follow the calibration wizard to reinitialize the display panel.

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Restoring Factory White Level Calibration

IMPORTANT: Restoration of the factory white level calibration is available only if you have previously calibrated the white level using the White Level Calibration service or via RightLight external sensor conformance testing. Factory calibration can be restored for Dome Ex, Dome GX4MP, and Dome Sx displays.

To restore factory calibration

Open the CXtra Services menu and select Restore Factory White Level Calibration. Click Yes to restore factory calibration.

After the factory calibration is restored, the Restore Factory White Level Calibration function is grayed out on the CXtra Services menu.

NOTE: You must be logged on as administrator to restore factory calibration.

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MQSA Quality Control Tests

Regular inspection and testing of diagnostic imaging displays designated for primary image diagnosis in mammography ensure display calibration and quality control. Only the Dome E5 and Dome S10 displays can be used for image diagnosis as regulated by the Mammography Quality Standards Act, or MQSA.

The Dome CXtra software helps you set up test reminders for consistent quality control activity and provides a way for you to record the results of the quality control tests electronically.

On the Dome E5 display, the MQSA Test Wizard is accessible only via the CXtra Services menu or the Windows Start menu.

With the Dome S10 display, you can access the wizard via the MQSA button as well as by the CXtra Services menu or Windows Start menu. A mini-USB cable connecting the display to the computer system is required for button functionality.

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Scope

The quality control tests are appropriately applied to the displays when they are specifically used for the clinical review of images acquired by full-field digital mammography systems, also called FFDM systems.

Materials/Equipment

The following items are required for the quality control tests.

• Dome E5 or Dome S10 display system with graphics controller and driver installed

• Computer workstation running Microsoft Windows XP Service Pack 3 or later

•Dome CXtra software

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• Calibrated external photometer

• Calibrated luxmeter with a minimum resolution of 1 lux

• Mini-USB cable (Dome S10 display installations only)

You can conduct three categories of tests—daily, monthly, and quality control for medical physicists (quarterly, biannually, annually options included)—to maintain the display. First, configure the software for test reminders. Then, when you see the reminders, carry out the procedures for daily testing, monthly testing, and quality control testing for medical physicists, as suitable for your facility and environment.

MQSA commands on the CXtra Services menu

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Configuring MQSA Test Reminders

Quality Control tests are simple checks that must be performed regularly to ensure the Dome display is operating to design standards. These tests are meant to detect any changes that might compromise image quality, as well as any deterioration in equipment performance that may occur over time. Setting test reminders facilitates the MQSA quality control activities.

You must log on as a privileged user to set up or modify the MQSA test configuration. (Be sure the Privilege service is installed. Also see page 138.) Then use the CXtra Services menu to access the MQSA Test Configuration dialog for setting up and later modifying test reminders.

NOTE: For Dome S10 display only. If the MQSA light is flashing, it stops when you open the MQSA Test Configuration dialog.

Use the MQSA Test Configuration dialog to enable and set up test reminders

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To configure the MQSA test reminders

1 Open the CXtra Services menu and select MQSA Test Configuration.

2 Optional: Check the selection box to enable Expert Mode. This

mode allows radiological technicians and medical physicists already familiar with evaluation of the SMPTE test pattern to quicken visual inspection of the display screen.

3 Check the selection box to enable the functionality for MQSA test

reminders.

NOTE: Reminders are issued only for the test(s) that you enable on the dialog.

4 Enter a time period for test postponement. Input a number from

1 to 59 for the number of minutes, or a number from 1 to 24 for the number of hours.

NOTE: When using the Dome S10 display, you can click the Ignore Test button on the wizard to temporarily reschedule a reminder. The reminder snoozes for the length of time specified. Notice that the button face toggles to Reset Ignore Test. Click the button again to restart the countdown of the test postponement time.

5 Set the daily test reminder. Use the pull-down arrow to select a

time for any or all weekdays. Click the corresponding selection box(es) to enable the daily test for the day(s). On the Dome S10 display, configure the warning light indicator. See “To configure the warning lights for test reminders” below.

6 Set the monthly test reminder. Enter a day or date. When you select

a day, you also need to choose an ordinal value. Click the selection box to enable the test. Configure the warning light indicator, if using a Dome S10 display. See “To configure the warning lights for test reminders” below.

7 Set the quality control test reminder for medical physicist. Select

the frequency of the tests, either quarterly, biannually, or annually. Click the selection box to enable the test. Set the starting month for the tests, then enter a day or date. When you select a day, you also need to select an ordinal value. Configure the warning light indicator, if using a Dome S10 display. See “To configure the warning lights for test reminders” below.

8 Click OK to finish.

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Configuring the Warning Light Indicators

NOTE: The Dome S10 display has LED warning light indicators to notify you of the need to run MQSA quality control. Each indicator glows in one of two colors—yellow or blue—by one of four patterns—slow blink, double blink, fast blink, or solid.

The LEDs are built into the MQSA button located on the lower right underside, beneath the display ID. Both the MQSA button and the functionality for setting the warning lights are available only for Dome S10 display installations.

LEDs built into the MQSA button the Dome S10 display glow by

preset color and pattern to indicate a quality control test is due

A yellow or blue glowing pattern means a test is due. No glowing of either color means all quality control activity is completed until the next due date.

The LEDs are ranked by priority of tests. For example, if two categories of tests are due and using the same indicator color, the indicator of the higher ranking test activates. Upon completion of that test, the indicator activates for the lower ranking test.

First Quality Control for Medical Physicist— Quarterly,

Biannually, or Annually

Second Monthly

Third Daily

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To configure the warning lights for test reminders

1 Open the CXtra Services menu and select MQSA Test

Configuration.

2 To set the indicator for a test reminder, click the warning light

button in that field. (NOTE: The default or previously selected pattern appears on the button face. For Dome S10 display only: When you hold the mouse over the warning light button, you can preview the selected light pattern via the MQSA button.)

3 Choose a color and select a pattern for that color. Drag the

horizontal scroll bar to set the LED brightness level.

4Click OK.

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MQSA Test Wizard

When you configure the MQSA test reminders, you can see due status of tests to perform via LED indicators in the MQSA button (on Dome S10 displays) and by the test wizard accessible via the CXtra Services menu. Depending upon the display you are using or how you access the test wizard—by the MQSA button (only on the Dome S10 display), the CXtra Services menu, or the Windows Start menu—the appearance of the wizard may vary.

Accessing the Test Wizard via the taskbar menu

When accessed via the CXtra Services menu, the test wizard shows the due status of each category of tests. After a test is completed, the wizard shows the next due date of that test.

MQSA Test Wizard that appears via the CXtra Services menu

Accessing the Test Wizard via the MQSA button

When you press the MQSA button, you gain access to each test category as well as a toggle button that allows you to ignore a test reminder for the length of the time you specified in the configuration dialog, or to reset the ignore period. The Ignore Test command is visible only when one or more tests are due.

The MQSA button is available only on the Dome S10 display. The wizard that appears is equivalent to that accessible via the Windows Start menu.

NOTE: On the Dome E5 display, access this same test wizard via the taskbar or Windows Start menu. There is no button on the unit.

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MQSA Test Wizard that appears via the MQSA button (Dome S10 display only) and via the Windows Start menu

(Dome E5 and Dome S10 displays)

The Ignore Tests/Reset Ignore Tests toggle button is visible only when one or more tests are due

After you run a test, that test button is grayed out on the wizard accessible via the MQSA button and the Windows Start menu. You can rerun the test before the next due date by accessing the wizard via the taskbar. Once all test have been completed the Ignore Tests/ Reset Ignore Tests toggle button is no longer visible.

Accessing the Test Wizard via the Windows Start menu

The test wizard that appears is equivalent to that accessible via the MQSA button. To access the test wizard, go to Windows Start > All Programs > NDSsi > MQSA.

The Ignore Tests/Reset Ignore Tests toggle button is no longer visible after all tests are completed

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Running the Daily Quality Control Test

To ensure optimal image viewing from day to day, inspect the display to keep the screen free of dust, fingerprints, and other marks.

Frequency. Clean the display daily or on days when clinical image reviews are scheduled.

Materials required. You need only a dry, soft, lint-free cloth or cleaning tissue. If necessary, the cloth or tissue may be lightly dampened with water or a mild cleanser before use. Never apply water or other fluids directly to the display.

Do not use or spray liquid, aerosol, ammonia, or alcohol-based cleaners on the display or screen. Some chemical cleaners may damage the display.

Do not use chemically treated dust cloths, acetone, toluene, or harsh solvents on the display case or the screen. They can damage the polarizer and the display case.

NOTE: Any other cleaning methods may lead to damage of the antireflective screen coating.

Procedure. Care must be taken when cleaning the display screen not to press too hard. If you apply excessive pressure, you may affect the image view or damage the display. Do not touch the LCD screen with your fingers. Skin oils are hard to remove from the screen.

To clean the display unit

1 Unplug the power supply before cleaning the display.

2 Gently clean all display screens using a dampened cloth or cleaning

tissue to remove dust, fingerprints, and other marks.

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3 Use a dry, soft, clean cloth to wipe off the residue.

NOTE: Always wipe off water and other stains immediately to avoid

damage to the screen. Do not exert excessive pressure on the display screen as this can damage the LCD module.

4 Check the screen to verify that it is free of dust, fingerprints, and

other marks.

The screen must be free of dust, fingerprints, and other marks. If these results are not obtained, the source of the problem must be identified and corrective action taken before any further mammographic images are reviewed or interpreted using the Dome display.

To complete the daily control test record

1 Open the Test Wizard and click Daily Quality Control Test.

2 Enter the facility ID: facility name, room, and tester initials.

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3 Click the selection box to record the clean status of the display(s).

Click the Check All Clean button to select the Clean check boxes simultaneously for a multiple display workstation. Click Uncheck All Clean button to remove the clean status or to be able to select the clean status for individual displays.

NOTE: Hover the mouse over the italic text to read the tooltips for materials required and procedures.

4 Review the light conditions according to the most recent medical

physicist’s evaluation posted in the reading room. Click the selection box for each parameter if conditions are met. Enter a description of the ambient light.

5Click Submit to finish.

6 Click View Report or Close.

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You can view the daily quality control test report on the screen or print it. Click Close when finished. Then clear the Test Completed dialog from the screen.

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If any conditions are the daily quality control test are not met, this dialog appears when you click Submit. Return to the quality control test dialog and follow procedures to remedy any deficiency. Or, click Ignore if you know for sure that the deficiency does not impede display quality or performance.

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Running the Monthly Quality Control Test

The monthly display calibration check is to ensure that the display is calibrated and the brightness and contrast settings are at an appropriate level for the reading of mammographic images on the Dome display.

The calibration check was designed to be performed with the SMPTE pattern built into the Dome CXtra software. Using any other pattern, particularly a pattern that is displayed with another image viewer tool, could result in failing the test and causing the display to be out of compliance with test requirements.

You have the option to conduct this test in Normal or Expert mode. Expert mode must be enable on the MQSA Test Configuration dialog.

To inspect display screen quality

When the SMPTE pattern appears on the display screen, examine the image carefully for the following features:

• Verify that the 0%-5% contrast is visible.

• Verify that the 95%-100% contrast is visible.

• Verify that each gray level step from 0% to 100% can be distinguished from the adjacent squares. Verify that you can, for example, distinguish the 0% square from the 10% square or the 90% square from the 100% square.

• Verify that the alphanumeric characters that appear on the pattern are sharp and in focus. For example, examine the “%” signs that label the steps of the gray scale.

• Verify that the high contrast line-pair images at the center and corners of the SMPTE pattern are distinguishable.

NOTE: The SMPTE pattern shown via the Dome CXtra software has five sets of high-contrast and five sets of low-contrast line-pair patterns. One set of each is in the center of the image, and one set of each is in each corner of the image. The high-contrast patterns have frequencies of 3- pixels-on/3-pixels-off, 2-pixels-on/2-pixels-off, and 1-pixel-on/1-pixel-off. At each frequency, a set of line-pairs is oriented in the horizontal direction and a set is oriented in the vertical direction. Visibility of the low-contrast patterns is not evaluated in this test.

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To complete the monthly control test record

1 Click Monthly Quality Control Test on the wizard. The SMPTE

pattern appears on each display connected to the system.

2 Examine the display screen. Click the Check All button if all

conditions are met. Click Next to inspect another display.

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3 Repeat the procedure for any other display(s).

Then click Submit to finish.

4 From either the Normal Mode or the Expert Mode, enter tester’s

name to complete process. Click Submit to finish.

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5 Click View Report or Close.

You can view the monthly quality control test report on the screen or print it. Click Close when finished. Then clear the Test Completed dialog from the screen.

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Expert Mode

When you select the Expert Mode option on the MQSA Test Configuration dialog, you can quicken the visual inspection of the monthly quality control test. The following dialog appears. After examining the display screen(s), click the All Pass button if no problems are found. Otherwise, click Edit Response to mark the area of screen that fail inspection. Clicking the Edit Response button directs you to the preceding Normal mode dialog.

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Running the Quality Control Tests for Medical Physicists

The Quality Control tests listed in this section must be performed by the medical physicist to ensure that the Dome display provides a high level of mammographic image quality.

These tests also establish the basis of the equipment evaluation that must be performed following the installation of a Dome display, the repair or replacement of a major component of the system, the relocation of a Dome display to another viewing location, or the substantial change of illumination in an existing viewing environment.

You must conduct the medical physicist series of quality control tests at least annually. Use the test configuration dialog to set up test reminders, or to set up reminders to conduct the test series more frequently, quarterly or biannually.

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Site and System Summary

Start by recording the site and system data for the facility.

To record the site and system data

1 Click the Site and System Summary button on the wizard.

2 Fill in the facility ID, address, and display location information.

3 Use the pull-down arrows to enter the date of installation and

the date of survey.

4 Enter the name of the medical physicist.

5Click Submit to finish.

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Return to the wizard to start the next test.

Viewing Condition Check and Setting

Compare the reading room configuration established as optimal with the actual one. If differences exist between this configuration and the actual one, adjust the room configuration to match that shown in the drawing. For example, if desk lights were described to be turned off, turn them off. Or, if the curtains were described to be closed, close them.

You need a calibrated luxmeter with a minimum resolution of 1 lux.

To set optimal viewing conditions

• Turn the lights off and close any doors and windows to make

the room as dark as possible.

• Turn on the displays at least 30 minutes before starting

the measurement.

• Position the displays used for reading digital images in optimal

conditions.

• Reduce to the minimum any lighting coming from other sources,

such as view boxes, overhead or task lighting, to reproduce typical ambient lighting conditions that would be set for reading digital images on the Dome display.

• Check that the ambient lighting is stable; that is, there are no

flickering effects due to any of the lighting sources that are turned on.

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NOTE: Look for the nominal value of the ambient light. This is a record of the most recent measurement and provides a comparison value for the next medical physicist survey.

If the reading room configuration has changed, the source of the problem must be identified and corrective action taken before any further mammographic images are reviewed or interpreted using the Dome display.

To record the viewing conditions

1 Click Viewing Condition Check and Setting button on

the test wizard.

2 Enter the room description and room trait.

3 Load the drawing of the valid reading room configuration.

4Click Submit to finish.

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Return to the wizard to start the next test.

Display Calibration Check

The calibration check is to ensure that the display is calibrated and the brightness and contrast settings are at an appropriate level for the reading of mammographic images on the Dome display. Conduct the display calibration at least annually.

NOTE: You must power on the Dome display at least 30 minutes before doing any measurements. This is mandatory to ensure that the backlight heating has reached steady state.

Be sure the external photometer is installed into an available USB slot, either on the back of the display stand or on the computer.

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To check display calibration

1 Click the Display Calibration Check button on the test wizard.

2 Click Next to access the External Sensor Conformance Wizard.

3 Click Next to launch the wizard. Be sure the photometer is

already installed.

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4 Place the photometer on an opaque surface, then click Initialize.

When the initialization is completed, click Next when the button is enabled.

5 Place the photometer on the target, and click Measure. After

the measurement have been taken, click Next when the button is enabled.

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6 Upon successful test completion, click Next.

If the conformance test fails, click the selection box to correct the warning. The wizard repeats.

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Once you have completed a successful conformance test, return to the MQSA Test Wizard, and conduct the next test.

Image Quality of SMPTE Pattern

The quality control of the SMPTE pattern is to ensure the display is calibrated and the brightness and contrast settings are at an appropriate level for the reading of mammographic images on the Dome display. Conduct an image quality of the SMPTE pattern at least annually.

You have the option to conduct this test in Normal or Expert mode. Expert mode must be enable on the MQSA Test Configuration dialog.

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To inspect display screen quality

When the SMPTE pattern appears on the display screen, examine the image carefully for the following features:

• Verify that the 0%-5% contrast is visible.

• Verify that the 95%-100% contrast is visible.

• Verify that the alphanumeric characters that appear on the pattern are sharp and in focus. For example, examine the “%” signs that label the steps of the gray scale.

• Verify that the high contrast line-pair images at the center and corners of the SMPTE pattern are distinguishable.

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To complete the control test record

1 Click Monthly Quality Control Test on the wizard. The SMPTE

pattern appears on each display connected to the system.

2 Examine the display screen. Click the Check All button if all

conditions are met. Click Next to inspect another display.

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3 Repeat the procedure for any other display(s).

Then click Submit to finish.

4 From either the Normal Mode or the Expert Mode, enter tester’s

name to complete process. Click Submit to finish.

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Return to the MQSA Test Wizard, and conduct the next test.

Analysis of Screen Defects

The visual inspection of screen defects is to determine if artifacts observed during system inspection can be attributed to the Dome display. Conduct the visual inspection during system acceptance, at least annually, and when necessary to isolate artifacts.

To inspect the display screen for defects

Follow these steps to inspect the display screen for defects.

• With the displays off or in the dark state, view for scratches and gouges. Record on the form those that are not admissible for mammography reading.

• With displays turned on, prepare the displays for the inspection of dots and debris. You can do this by using the Windows Desktop popup menu.

• Place the cursor anywhere on the desktop. Right-click to open the popup menu and select Properties. Record the existing background selected for later reference.

• Select None for background setting and select the color Black from the pull-down color palette. Click OK. All screens should present Black.

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• At a normal viewing distance (approximately from 13 to 20 inches) inspect each panel for visible white dots and other foreign debris. Record those that are not admissible for mammography reading.

• Place the cursor anywhere on the desktop. Right-click to open the popup menu and select Properties.

• Select the color White from the pull-down color palette. Click OK. All screens should display White.

• At a normal viewing distance (approximately from 13 to 20 inches) inspect each panel for visible black dots and other foreign debris. Record those that are not admissible for mammography reading.

• Place the cursor anywhere on the desktop. Right-click to open the popup menu and select Properties. Select the original background and click OK.

To complete the control test record

1 Click the Analysis of Screen Defects button on the wizard.

2 Record the results of the inspection on the dialog. Enter the

percentage of black or white defects and descriptions of any artifact, visible scratch, black or white point. Then enter any general comments about the screen defects observed.

3 Click Next to record the analysis of another display on the system,

or click Submit to finish.

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The quality control testing for medical physicists is completed for the current cycle. Click Finish.

Click View Report or Close.

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You can view the quality control test report on the screen or print it. Click Close when finished, then clear any remaining dialog from the display screen.

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DICal Service

You can use the DICal service to adjusts the characteristic curve of the Dome GX2MP Plus, Dome GX2MP, and select desktop displays (such as models PX1910M and PX212M) to conform to the DICOM Grayscale Standard Display Function.

The configuration of the service provides an option for default DICOM calibration (for viewing diagnostic images), which is adequate for many applications. For additional calibration accuracy or to verify calibration, you can purchase the optional LCD or LCD II photometer and use the DICal service to perform custom calibration based on the actual luminance values of your display.

In addition to the DICOM response function, you can choose to use the exponential, gamma, or original response function. When you add all functions to the CXtra Services menu, you can switch quickly from one response function to another. Moving from one response function to another causes an immediate change to the display calibration.

The DICal service also allows you to test your calibrated display to verify that it conforms to the DICOM standard.

NOTE: See “Enabling DICOM Calibration on Third-Party Monitors” on page 95 if you are using a third-party monitor.

To facilitate the configuration of multiple displays, you can export the characterization data from one system to another.

NOTE: During the characterization or calibration process, you can skip or ignore non-DICal displays on the system.

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Configuring the DICal Service

The desktop display ships with brightness and contrast values already set (defaulted) for DICOM compliance, as shown in this sample table.

Display Model Brightness Contrast

Desktop PX1910M (2007 or later) 70% 60%

GX2MP 75% 70%

GX2MP (JUN 2007 and later) 75% 70%

GX2MP (JAN 2010 and later) 65% 70%

GX2MP (FEB 2011 and later) 65% 70%

GX2MP (SEPT 2011 and later) 65% 70%

GX2MP Plus

* This entry shows the percentages of brightness and contrast with Backlight

Stabilization (BLS) off. When on, the BLS sensor maintains brightness at 185 cd/m

Start at procedure step 2 to configure the DICal service upon initial use. Use the entire procedure to configure the service after display settings have been changed.

(NOV 2011 and later)

65% 70%

To configure the DICal service

1 Set the brightness and contrast of your display. (Refer to the display

manual for how to set the values.)

2 Open the CXtra Services menu and select DICal Panel

Configuration.

3 Verify that the model number of your display appears in

the dialog. If the correct model number is visible, skip to step 5. If the model number is incorrect, continue to step 4.

4 Click Edit Type, select the model number of the display from

the drop-down list, and click OK.

NOTE: Displays listed have been characterized; therefore, the Characterize button is disabled. You cannot recharacterize a display that has been characterized previously.

5 Open the Calibration tab and select DICOM response function.

6Click OK.

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Using DICOM Response Function as Default Calibration

Open the DICal Panel Configuration dialog to the Configuration tab. To activate DICOM grayscale calibration at each system startup, click the check box for DICOM response function.

The default DICOM calibration is applied to your display settings whenever you select Desktop DICOM Calibration from the services menu. No other steps are needed to apply the DICOM calibration after installation.

To apply the original calibration each time you start the system, leave the box unchecked.

To apply another response function, choose from the options on the Calibration tab. See “Choosing Display Calibration” on page 84.

NOTE: For proper display calibration, you must configure the DICal service after installation. See page 82.

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Choosing Display Calibration

Besides DICOM calibration, you can choose to use exponential, gamma, or original display calibration. Open the CXtra Services menu, then select DICal Panel Configuration and Calibration tab.

Choose one of these response functions for auto-calibration:

• DICOM Response Function – Calibrates to the DICOM Grayscale Standard Display Function. Refer to DICOM PS 3.14-2000 (Digital Imaging and Communications in Medicine (DICOM), Part 14: Grayscale Standard Display Function).

• Exponential Response Function – Calibrates to an exponential (log linear) response function. The logarithm of the luminance is a linear function of the digital driving level.

• Gamma Response Function – Calibrates to a gamma (nonlinear) response function. The default value is 2.2. The range extends from

1.5 to 3.5; the CRT gamma standard ranges from 2.0 to 2.5.

• Original Response Function – Calibrates the desktop its original response function. The characteristic curve is the response function of the display with no calibration applied. This is the response function created by loading a linear gamma correction table, or GCT. (This function is appropriate for running typical Windows applications.)

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NOTE: Upon software installation, only Desktop DICOM Calibration and Desktop Original Calibration are default entries on the services menu. On the Calibration tab, select or deselect check boxes in the Menu field to customize calibration entries on the services menu.

To switch to another calibration

Open the CXtra Services menu. Choose from the display calibrations you have added to the services menu. Otherwise, go to the Calibration tab of the DICal Panel Configuration dialog to make a choice. Click OK to finish. Your selection causes an immediate change to the display calibration.

NOTE: If a photo-editing program or other Windows application performs a color calibration while DICOM Calibration is selected, the DICal menu selection switches to Original Calibration and a warning appears. To reapply the DICOM calibration, select the command from the services menu or the DICal Panel Configuration dialog.

Performing a Custom DICOM Calibration

A custom DICOM calibration uses the actual luminance values of your display to adjust the response curve. After you complete the calibration, the new values are applied in place of the default DICOM calibration whenever DICOM Calibration is selected on the services menu.

NOTE: This procedure requires installation of the optional LCD or LCD II photometer as described on page 10.

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To perform a custom calibration

1 If you have one of the display models listed on the configuration

dialog, follow instructions provided with the display to verify that the contrast is set properly. This sample table shows the contrast

percentage for a set of the display models.

Display Model Contrast

Desktop PX1910M (2007 or later) 60%

GX2MP 70%

GX2MP (JUN 2007 and later) 70%

GX2MP (JAN 2010 and later) 70%

GX2MP (FEB 2011 and later) 70%

GX2MP (SEPT 2011 and later) 70%

GX2MP Plus (NOV 2011 and later) 70%

2 If the Privilege service has been installed, log on as a privileged

user. (See page 138.)

3 Open the CXtra Services menu. Select DICal Calibration >

Calibration Wizard.

4 Follow the instructions for using the photometer in each

Calibration Wizard window and click Next. NOTE: Abort the calibration at any time by pressing Ctrl+C.

5 If necessary, verify that your display calibration conforms to

the DICOM standard. (See page 88 for instructions.)

NOTE: If you change panel brightness using the brightness control on the display, you must repeat the preceding calibration steps.

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Reviewing Calibration Events

The Dome CXtra software records an event in the History event log each time you perform a calibration.

To review a calibration event

1 Open the CXtra Services menu and select Reporting.

2 Click the History tab to see a list of events.

3 Click a DICal service calibration event, then click View Detail to

see detailed information about the event.

NOTE: Only calibration and test status events have detailed information available.

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Performing a Conformance Test

You can use DICal service to verify that your display conforms to the DICOM standard.

NOTE: This procedure requires installation of the optional LCD or LCD II photometer. (See page 10.)

To perform a conformance test

1 If the Privilege service has been installed, log on as a privileged

user. (See page 138.)

2 Open the CXtra Services menu and select DICal Conformance >

Conformance Wizard.

3 Follow the instructions for using the photometer in each

Conformance Wizard window and click Next.

NOTE: Press Ctrl+C to abort the test at any time.

4 If the last DICal Conformance Wizard window indicates that the

display conforms to DICOM standards, click Next or Finish. Go to step 5.

If the last DICal Conformance Wizard window contains a warning, click Next or Finish to close the window. Perform a custom DICOM calibration as described on page 85. After calibration, perform another conformance test. Start at step 1.

5 If necessary, review the conformance test data and test events

according to instructions in the following section.

Reviewing Conformance Test Data

Whenever you perform a conformance test, the DICal service stores the generated data in both graphical and tabular formats.

To view the most recent conformance data, open the CXtra Services menu and select DICal Conformance > Conformance History. The Conformance History dialog opens with Graphs and Table tabs. The Graphs tab appears initially by default.

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Using the Graphs Tab

Use the controls on the Graphs tab to select a conformance test and change how the system shows the data for a selected test. When using multiple display panels, select a particular panel in the Display drop-down list. Select a particular conformance test by selecting the data and time of the test in this drop-down list. Use Print Graph to output the graph currently on the screen.

Graph Type

• Response. Presents the luminance values at various luminance intervals (P-values). Luminance is shown along the vertical axis using a scale that you select from three options: Linear / Lum, Linear / Log Lum, and Linear / JND Lum. The Response graph consists of a curve and a set of data points. The curve shows the luminance values specified by the DICOM standard and the data points show the luminance values measured during the conformance test. In general, the closer the data points match the curve, the better the DICOM conformance.

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• Conformance. Presents values of Just Noticeable Differences (JND) per luminance interval and the mean value for JND/luminance interval. These values include the Luminance Uniformity Metric (LUM - DICOM metric) value and the FIT line expression used to quantify the degree of conformance.

In general, the closer the JND values are to the mean line, the better the DICOM conformance. In addition, the closer the calculated LUM metric is to 0 (zero), the better the DICOM conformance.

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Using the Tables Tab

The Tables tab shows response and conformance numerical data for a given conformance test. When using multiple display panels, select a particular panel in the Display drop-down list. Select a particular conformance test by selecting the data and time for the test in this drop-down list. Use Print Table to output the data currently on the screen.

Table Type

• Response. Presents the luminance value measured for each luminance interval in a selected conformance test.

• Conformance. Shows the following data values for a selected test:

– Number of measurements

– Mean value of JND/Luminance Interval

– Best fit (FIT) line expression

– LUM

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Reviewing Conformance Test Events

The Dome CXtra system records an event in the History event log each time you complete a conformance test.

To review a conformance test event

1 Open the CXtra Services menu and select Reporting.

2 Click the History tab to see a list of events.

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3 Click a conformance test status event, then click View Detail to

see a summary of information about that test.

NOTE: Only test events and calibration events have detailed information available.

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Advanced Options

When you connect a third-party monitor or unsupported display to your system, you see that the Dome CXtra software labels it “unknown” and “not” characterized in the DICal Panel Configuration dialog. The DICal service needs to characterize or recognize a display before it performs calibration.

When the third-party monitor or unsupported display lacks a characterization data file, run the characterization wizard, then save the panel type with a unique name. After you generate the data file, you can export it to other systems to characterize identical displays.

Characterizing a Display

Run the Characterization wizard from one of two locations:

• Open the CXtra Services menu and select DICal Calibration > Characterization Wizard.

• Open the CXtra Services menu and select DICal Panel Configuration. Highlight the display and click Characterize.

NOTE: The number of measurements you can take ranges from 0 to

256. At a minimum, run the default of 64 measurements.

Exporting Characterization Data

Open the CXtra Services menu. Select DICal Calibration > Export characterization data.

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Select the data file to export, then store it in the Dome CXtra dat folder on the other system.

Enabling DICOM Calibration on Third-Party Monitors

After characterization, operate the third-party monitor with Desktop DICOM Calibration enabled.

You can undo the Panel Type selection for third-party monitors using Edit Type. Choose <Not characterized> and click OK.

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Test Patterns Service

You can view a variety of test patterns for assessing image quality using the Test Patterns service. Two categories of test patterns are installed with the service:

• AAPM (American Association of Physicists in Medicine) TG18

• Miscellaneous patterns such as SMPTE, horizontal and vertical ramps, and geometric distortions

You can also import custom test patterns in .DCM, .DC3, .JPG, or .TIF formats, as well as perform visual and interactive evaluations.

NOTE: You can manage custom test patterns only if the program feature for doing so has been installed.

AAPM TG18 Test Patterns

AAPM TG18 patterns provided with the Test Patterns service are described in American Association of Physicists in Medicine (AAPM), Task Group 18 Assessment of Display Performance for Medical Imaging Systems Pre-print Draft (v9.0), October 9, 2002.

Different pattern sets allow you to assess six different display characteristics. The table on page 97 shows the six sets of AAPM TG18 patterns provided with Test Patterns service. Most patterns are available in a1024 x 1024 size and some are available in a 2048 x 2048 size.

Miscellaneous Test Patterns

The following miscellaneous test patterns are installed with Test Patterns service.

• Bull’s-eye • Horizontal Ramp

• Geometrical Distortions Coarse • Single pixel

• Geometrical Distortions Fine • SMPTE

• Geometrical Distortions Hs • Vertical Ramp

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