Canon MLT (S), MLT User Manual

CXDI Image Processing Software

MLT (S)

User’s Manual

Before using the instrument, be sure to read this manual thoroughly. Also, read the manuals of other instruments in this system. Keep the manual where it is easily accessible.

Please Note

1. In no event will Canon be liable for direct or indirect consequential damage arising out of the use of this product. Canon will not be liable for loss of image data due to any reason.

2. Please have this product installed by Canon representative or distributor.

3. Canon reserves the right to change the specifications of the product without prior notice.

Contents

1. Overview .....................................................................................................1

1.1 About MLT (S) ........................................................................................................... 1

1.2 Available Functions of MLT (S) ................................................................................. 2

2. Edit Exposure Mode Settings ......................................................................3

2.1 Procedures to Set Exposure Mode ........................................................................... 3

2.2 Setting Enhancement ................................................................................................ 7

2.3 Setting Noise Reduction ............................................................................................ 8

2.4 Setting Dynamic Range Adjustment ......................................................................... 9

2.4.1 Setting high-density sections ............................................................................. 9

2.4.2 Setting low-density sections ............................................................................. 10

3. QA Mode Settings .....................................................................................11

3.1 Procedures to Change Parameters ......................................................................... 11

3.2 Changing Enhancement .......................................................................................... 14

3.3 Changing Noise Reduction .....................................................................................15

3.4 Changing Dynamic Range Adjustment ................................................................... 16

3.4.1 Changing high-density sections ....................................................................... 16

3.4.2 Changing low-density sections ........................................................................ 17

4. QA Parameters .........................................................................................18

Notation Conventions

Notation 1

In this manual, the name of button is enclosed with a pair of brackets [ ], and the buttons that are selected in succession are connected with > to indicate the order.

Example: On the Exposure screen, touch the followings:

[SYSTEM] > [EDIT EXPOSURE MODE]

Notation 2

If any detailed explanation for the operation or setting is available on other page in this manual, the page to refer is indicated with (→ page number).

Example: Please set the parameters by referring to 2.2 Setting Enhancement (→ P. 7 ) .

Notation 3

When description of the procedure or setting continues from an odd-numbered page (right page) to the subsequent evennumbered page (left page), a small note, [Continued on the following page »] appears at the bottom-right of the oddnumbered page to draw your attention.

1. Overview

1.1 About MLT (S)

NOTE: This user’s manual is for version 7.1 and later of the CXDI System Software.

The CXDI Image Processing Software MLT (S) (called “MLT (S)” in this manual) is designed to extend the image processing functions provided with the CXDI series of Canon digital radiography system (called “CXDI” in this manual). By installing MLT (S) on the Control PC, the advanced image processing features of MLT (S) are brought into full scope both in the Edit Exposure Mode and QA Mode.

QA Mode Screen Extended by MLT (S) (ENHANCEMENT Tab)

QA Mode Screen Extended by MLT (S) (DYNAMIC RANGE Tab)

– 1 –

1.Overview

1.2 Available Functions of MLT (S)

This manual describes the operating procedures of the following image processing function that is available with MLT (S). For details and information on other image processing functions, please refer to Operation Manual and Setup Guide.

Enhancement

This accentuates edge details and local contrast of the exposure image for improving sharpness. The degree of enhancement can be adjusted by setting the edge enhancement parameters. The frequency band for edge enhancement can also be modified by setting the edge frequency parameters. The degree of enhancement of the local contrast can be adjusted by setting the contrast boost parameters.

Noise Reduction

This reduces noise in the exposure image for improving granularity. The EFFECT parameter setting can be used to adjust the degree of noise reduction.

Dynamic Range Adjustment

This improves the detectability of high-density and low-density areas in the exposure image. The settings for the maximum density parameter and minimum density parameters can be used to adjust the dynamic range.

NOTE: The effects resulting from changes to the parameters may be difficult to check

in the exposure image of the QA mode screen. In these cases, check by touching [MAG.] or [QA-MAG.] to display the enlarged screen.

– 2 –

Continued on the following page >>

2. Edit Exposure Mode Settings

Sensor Unit

Button

Category Tab

Exposure Mode

2.1 Procedures to Set Exposure Mode

Display the Edit Exposure Mode screen

1

On the Exposure screen, touch the followings:

[SYSTEM] > [EDIT EXPOSURE MODE]

Edit Exposure Mode Screen

Select the Sensor Unit

2

If two or more sensor units are being used in the system, touch the Sensor Unit button, then select the Sensor Unit.

Select the Category tab

3

If eight or more categories are registered in the system, touch the or button to display the Category tabs that are not currently visible.

– 3 –

2.Edit Exposure Mode Settings

Select the Exposure Mode

4

Make sure that [EDIT PARA.] at the top-left is displayed in highlight, then select the desired Exposure Mode. The EDIT PARA. screen appears.

EDIT PARA. Screen (PREVIOUS PAGE)

Display the next page

5

Touch [NEXT PAGE].

EDIT PARA. Screen (NEXT PAGE)

– 4 –

Continued on the following page >>

2.Edit Exposure Mode Settings

Frequency

Processing

Mode

Button

Select MLT (S) FREQUENCY

6

If MLT (S) FREQUENCY is not currently selected (in this case, the MLT(S) tab is not displayed), touch the Frequency Processing Mode button to open the window, then touch [MLT(S) FREQUENCY].

Frequency Processing Mode Window

Select the tab

7

Touch the MLT(S) tab.

Screen Appearance when MLT(S) FREQUENCY is Selected

Set the parameters

8

Set the parameters by referring to 2.2 Setting Enhancement (→ P. 7 ) , 2.3 Setting Noise Reduction (→ P. 8 ) , and 2.4 Setting Dynamic Range Adjustment (→ P. 9) .

– 5 –

2.Edit Exposure Mode Settings

Save the parameters

9

Touch [OK]. The window displaying the following message appears: Save the changed parameter. Then, touch [OK].

When Password is required

If the password is specified, a different message is displayed in the window as follows:

Administrator’s authority is needed. Enter system password.

In this case, touch anywhere within the frame to display On-Screen-Keyboard, type your password, then touch [OK].

– 6 –

2.2 Setting Enhancement

Enable enhancement

1

Each time [ENHANCEMENT] is touched, the setting switches between the highlight (white outline characters against a colored background) and normal display. Edge enhancement is enabled when in the highlighted state.

2.Edit Exposure Mode Settings

Screen Appearance when Enhancement is Enabled

Set the EDGE ENHANCEMENT parameter

2

Touch the or button, and set the degree of edge enhancement within the range between 0 to 20. The value on the left is the setting saved previously, and the value on the right is the modified value. This setting value determines the degree of edge enhancement. Larger values result in more enhancement, and smaller values result in less enhancement.

Set the EDGE FREQ. parameter

3

Touch the or button, and set the edge frequency within the range between 1 to 7. The value on the left is the setting saved previously, and the value on the right is the modified value. This setting value determines the frequency range for edge enhancement. Smaller values enhance ranges containing low frequencies over high frequencies. Large values, on the other hand, enhance high frequencies only.

Set the CONTRAST BOOST parameter

4

Touch the or button, and set the contrast boost within the range between 0 to 20. The value on the left is the setting saved previously, and the value on the right is the modified value. This setting value is the degree of enhancement of the local contrast. Large values provide more enhancement of the local contrast, and smaller values provide less enhancement.

NOTE: If the EDGE ENHANCEMENT and CONTRAST BOOST parameters under

the ENHANCEMENT are set to excessive values, artifacts may occur in the image, or the effective data of the exposure image may be damaged. Check the exposure image, and if the enhancement is too strong, either set the EDGE ENHANCEMENT and CONTRAST BOOST to smaller values or disable the enhancement.

– 7 –

2.Edit Exposure Mode Settings

2.3 Setting Noise Reduction

Enable noise reduction

1

Each time [NOISE REDUCTION] is touched, the setting switches between the highlight (white outline characters against a colored background) and normal display. Noise reduction is enabled when in the highlighted state.

Screen Appearance when Noise Reduction is Enabled

Set the EFFECT parameter

2

Touch the or button, and set the EFFECT parameter within the range between 1 to

10. The value on the left is the setting saved previously, and the value on the right is the modified value. This value determines the degree of noise reduction. Larger values result in stronger noise reduction, and smaller values result in weaker noise reduction.

NOTE: If the EFFECT parameter is set to an excessive value, artifacts can occur in

the image, or the effective data of the exposure image may be damaged. Check the exposure image, and if noise reduction is too strong, either set the EFFECT parameter to a smaller value or disable the setting.

– 8 –

2.4 Setting Dynamic Range Adjustment

2.4.1 Setting high-density sections

Enable dynamic range adjustment (DARK REGION)

1

Each time [DARK REGION] is touched, the setting switches between the highlight (white outline characters against a colored background) and normal display. This is enabled when in the highlighted state.

2.Edit Exposure Mode Settings

Screen Appearance when Dynamic Range Adjustment (DARK REGION) is Enabled

Set the maximum density

2

Touch the or button, and set the EFFECT parameter within the range between 1 to

20. The value on the left is the setting saved previously, and the value on the right is the modified value. This value determines the maximum density assigned to the subject range. Larger values result in higher maximum densities, and smaller densities result in lower maximum densities.

NOTE: If the EFFECT parameter is set to a value that is too low, artifacts can occur

in the image, or the effective data of the exposure image may be damaged. Check the exposure image, and if the image is proccessed excessively, either set to a larger maximum density or disable the setting.

– 9 –

2.Edit Exposure Mode Settings

2.4.2 Setting low-density sections

Enable dynamic range adjustment (BRIGHT REGION)

1

Each time [BRIGHT REGION] is touched, the setting switches between the highlight (white outline characters against a colored background) and normal display. This is enabled when in the highlighted state.

Screen Appearance when Dynamic Range Adjustment (BRIGHT REGION) is Enabled

Set the minimum density

2

Touch the or button, and set the EFFECT parameter within the range between 1 to

20. The value on the left is the setting saved previously, and the value on the right is the modified value. This value determines the minimum density assigned to the subject range. Larger values result in higher minimum densities, and smaller values result in lower minimum densities.

NOTE: If the EFFECT parameter is set to a value that is too high, artifacts can occur

in the image, or the effective data of the exposure image may be damaged. Check the exposure image, and if the image is proccessed excessively, either set to a smaller minimum density or disable the setting.

– 10 –

Continued on the following page >>

3. QA Mode Settings

3.1 Procedures to Change Parameters

Image processing of exposure image with CXDI is called QA (Quality Assurance) Processing, and can be performed by adjusting the parameters on the QA Mode screen to optimize the exposure image.

Display the QA Mode screen

1

Display the QA Mode screen by one of the following methods:

QA Mode Screen

To display the QA Mode screen automatically right after x-ray exposure

On the Exposure screen, touch the followings to display the DISPLAYING PARAMETER CHANGE/QA SCREEN DURING EXPOSURE screen:

[SYSTEM] > [SETUP MENU] > [SYSTEM SETUP] > [DISPLAYING PARAMETER CHANGE/QA SCREEN DURING EXPOSURE]

Then set the QA Mode screen effective.

To perform QA Processing right after x-ray exposure

Touch [QA] on the Preview screen.

To perform QA Processing after examination

Select the exposure image from the Study List, display the selected image, then touch

[QA].

– 11 –

3.QA Mode Settings

Frequency Processing Mode Button

Select MLT(S) FREQUENCY

2

If MLT(S) FREQUENCY is not currently selected (in this case, the ENHANCEMENT and DYNAMIC RANGE tabs are not displayed), touch the Frequency Processing Mode button to open the window, then touch [MLT(S) FREQUENCY].

Frequency Processing Mode Window

When the Frequency Processing Mode button is not visible

If the Frequency Processing Mode button is not displayed on the screen, touch the button at the bottom part of the screen.

Select the tab

3

To change enhancement and noise reduction, touch the ENHANCEMENT tab. To change the dynamic range adjustment, touch the DYNAMIC RANGE tab.

Change the parameters

4

Change the parameters by referring to 3.2 Changing Enhancement (→ P. 1 4 ) ,

3.3 Changing Noise Reduction (→ P.15), and 3.4 Changing Dynamic Range Adjustment (→ P.16).

– 12 –

3.QA Mode Settings

Save the new parameters

5

To save new parameters as the default values of the Exposure Mode (except opening from Study List), touch [SAVE PARAM]. The window displaying the following message appears:

Are you sure you want to change the default generator parameters? Then, touch [YES].

When Password is required

If the password is specified, a different message is displayed as follows:

Administrator’s authority is needed. Enter system password.

In this case, touch within the frame to display On-Screen-Keyboard, type your password, then touch [OK].

Close the QA Mode screen

6

Touch [OK].

When [OK] is not visible on the screen

If [OK] is not displayed on the screen, touch the button at the bottom part of the screen.

– 13 –

3.QA Mode Settings

3.2 Changing Enhancement

Enable enhancement

1

Each time [ENHANCEMENT] is touched, the setting switches between the highlight (white outline characters against a colored background) and normal display. This is enabled when in the highlighted state.

Screen Appearance when Enhancement is Enabled

Set the EDGE ENHANCEMENT parameter

2

Touch the or button, and set the degree of edge enhancement within the range between 0 to 20. The value on the left is the setting saved previously, and the value on the right is the modified value. This setting value determines the degree of edge enhancement. Larger values result in more enhancement, and smaller values result in less enhancement.

Set the EDGE FREQ. parameter

3

Touch the or button, and set the edge frequency within the range between 1 to 7. The value on the left is the setting saved previously, and the value on the right is the modified value. This setting value determines the frequency range for edge enhancement. Smaller values enhance ranges containing low frequencies over high frequencies. Large values, on the other hand, enhance high frequencies only.

Set the CONTRAST BOOST parameter

4

Touch the or button, and set the contrast boost within the range between 0 to 20. The value on the left is the setting saved previously, and the value on the right is the modified value. This setting value is the degree of enhancement of the local contrast. Large values provide more enhancement of the local contrast, and smaller values provide less enhancement.

NOTE: If the EDGE ENHANCEMENT and CONTRAST BOOST parameters under

the ENHANCEMENT are set to excessive values, artifacts may occur in the image, or the effective data of the exposure image may be damaged. Check the exposure image, and if the enhancement is too strong, either set the EDGE ENHANCEMENT and CONTRAST BOOST to smaller values or disable the enhancement.

– 14 –

3.3 Changing Noise Reduction

Enable noise reduction

1

Each time [NOISE REDUCTION] is touched, the setting switches between the highlight (white outline characters against a colored background) and normal display. Noise reduction is enabled when in the highlighted state.

3.QA Mode Settings

Screen Appearance when Noise Reduction is Enabled

Set the EFFECT parameter

2

Touch the or button, and set the EFFECT parameter within the range between 1 to

10. The value on the left is the setting saved previously, and the value on the right is the modified value. This value determines the degree of noise reduction. Larger values result in stronger noise reduction, and smaller values result in weaker noise reduction.

NOTE: If the EFFECT parameter is set to an excessive value, artifacts can occur in

the image, or the effective data of the exposure image may be damaged. Check the exposure image, and if noise reduction is too strong, either set the EFFECT parameter to a smaller value or disable the setting.

– 15 –

3.QA Mode Settings

3.4 Changing Dynamic Range Adjustment

3.4.1 Changing high-density sections

Enable dynamic range adjustment (DARK REGION)

1

Each time [DARK REGION] is touched, the setting switches between the highlight (white outline characters against a colored background) and normal display. This is enabled when in the highlighted state.

Screen Appearance when Dynamic Range Adjustment (DARK REGION) is Enabled

Set the maximum density

2

Touch the or button, and set the EFFECT parameter within the range between 1 to

20. The value on the left is the setting saved previously, and the value on the right is the modified value. This value determines the maximum density assigned to the subject range. Larger values result in higher maximum densities, and smaller values result in lower maximum densities.

NOTE: If the EFFECT parameter is set to a value that is too low, artifacts can occur

in the image, or the effective data of the exposure image may be damaged. Check the exposure image, and if the image is proccessed excessively, either set to a larger maximum density or disable the setting.

– 16 –

3.4.2 Changing low-density sections

Enable dynamic range adjustment (BRIGHT REGION)

1

Each time [BRIGHT REGION] is touched, the setting switches between the highlight (white outline characters against a colored background) and normal display. This is enabled when in the highlighted state.

3.QA Mode Settings

Screen Appearance when Dynamic Range Adjustment (BRIGHT REGION) is Enabled

Set the minimum density

2

Touch the or button, and set the EFFECT parameter within the range between 1 to

20. The value on the left is the setting saved previously, and the value on the right is the modified value. This value determines the minimum density assigned to the subject range. Larger values result in higher minimum densities, and smaller values result in lower minimum densities.

NOTE: If the EFFECT parameter is set to a value that is too high, artifacts can occur

in the image, or the effective data of the exposure image may be damaged. Check the exposure image, and if the image is proccessed excessively, either set to a smaller minimum density or disable the setting.

– 17 –

4. QA Parameters

When MLT (S) frequency processing is selected, the QA parameters (%IP_PARAM%) in Annotation are displayed in the format below.

REX680 Q3 E5,7,0 D20,3 N5 GCS18,15 R RT+90 Z0 M2,1,1 P1

This section describes the parameters specific to the MLT(S) (underlined 1 to 4). For details about the other parameters, please refer to the Operation Manual (Setup Guide).

1 Frequency Processing Mode

If MLT (S) FREQUENCY is selected, Q3 is displayed.

2 Enhancement

The parameter is displayed as: E edge enhancement, edge frequency, contrast boost Nothing is displayed if the enhancement is disabled.

3 Dynamic Range Adjustment

The parameter is displayed as: D Maximum density, minimum density Nothing is displayed if both the DARK REGION and BRIGHT REGION are disabled. If the DARK REGION only is disabled, the parameter is displayed as D*, 3, and if the

BRIGHT REGION only is disabled, it is displayed as D20, *.

12 34

4 Noise Reduction

The parameter is displayed as: N Effect Nothing is displayed if NOISE REDUCTION setting is disabled.

– 18 –

CANON INC. Medical Equipment Group

30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo, Japan Telephone: (81)-3-3758-2111

CANON U.S.A., INC. CANON MEDICAL SYSTEMS

15955 Alton Parkway, Irvine, CA 92618-3616, U.S.A. Telephone: (1)-949-753-4160

CANON EUROPA N.V. Medical Products Division

Bovenkerkerweg 59-61, 1185 XB Amstelveen, The Netherlands Telephone: (31)-20-545-8926

PUB. L-IE-4146A