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Nuclear Associates 37-705
VeriDose® V Five Channel Patient Dose Monitor
January 2007
Manual No. 37-705-1 Rev. 5
©2006, 2007 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies
Operators Manual
Page 2
Fluke Biomedical
Radiation Management Services
6045 Cochran Road
Cleveland, Ohio 44139
440.498.2564
www.flukebiomedical.com/rms
Page 3
Table of Contents
Section 1: Introduction................................................................................................ 1-1
1.1 General Description ..................................................................................... 1-1
1.2 Features....................................................................................................... 1-1
1.3 Specifications............................................................................................... 1-2
1.4 Accessories ................................................................................................. 1-3
1.5 Receiving Inspection.................................................................................... 1-4
1.6 Storage ........................................................................................................ 1-4
1.7 Routine Cleaning ......................................................................................... 1-4
1.8 Procedures, Warnings, and Cautions .......................................................... 1-5
1.9 Warning and Caution Summary................................................................... 1-5
Section 2: Operation.................................................................................................... 2-1
2.1 Menu Structure Overview ............................................................................ 2-1
2.1.1 General Description................................................................................ 2-1
2.1.2 Menu Operation...................................................................................... 2-1
2.1.3 Startup Screen ....................................................................................... 2-2
2.1.4 Getting Started ....................................................................................... 2-2
2.1.5 Setup ...................................................................................................... 2-2
2.1.6 Connecting to a Computer...................................................................... 2-2
2.1.7 Connecting to a Printer – Reference: Setup-Printer ............................... 2-2
2.1.8 Connections ........................................................................................... 2-2
2.2 Initial Calibration Group ............................................................................... 2-3
2.2.1 Diode Connection and Calibration.......................................................... 2-3
2.2.2 Calibration Process ................................................................................ 2-3
2.2.3 Adding a Diode Group ............................................................................ 2-3
2.2.4 Entering the Database Information......................................................... 2-3
2.2.5 Performing the Calibration...................................................................... 2-4
2.3 Measure Modes ........................................................................................... 2-4
2.4 Select Mode................................................................................................. 2-7
2.5 Setup Modes................................................................................................ 2-8
2.6 QA Phantom ................................................................................................ 2-9
2.7 Calibrate Modes......................................................................................... 2-11
Section 3: VeriDose QC Phantom............................................................................... 3-1
3.1 General Description ..................................................................................... 3-1
3.2 VeriDose QC Phantom Specifications ......................................................... 3-1
3.3 Connection to the VeriDose V...................................................................... 3-2
3.4 Setup ........................................................................................................... 3-2
3.5 Calibration.................................................................................................... 3-2
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3.6 Flatness and Symmetry Measurements....................................................... 3-3
3.7 Depth Dose Check....................................................................................... 3-3
Appendix A: Reports .......................................................................................................A-1
Appendix B: Error Messages..........................................................................................B-1
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Introduction
General Description
Section 1
Introduction
1.1 General Description
The VeriDose V is a microprocessor based five-channel diode dosimeter for use with radiation sensing
diodes. The unit is manufactured by Fluke Biomedical. It provides integrated dose and dose rate display
capabilities for patient dose verification and quality assurance in radiation therapy. The diodes may be
attached to a patient's skin during radiation therapy when the patient is being exposed to x-rays or
electrons. The diodes produce a current directly proportional to the ionizing radiation to which they are
exposed. These diodes are directly connected to the VeriDose V. Dose measurements are displayed in
units of cGy while rate measurements are shown in units of cGy/minute.
The VeriDose V is intended as a readout for detector diodes (user supplied) used for the detection of
ionizing radiation, it should only be used by responsible persons who have the proper training in the
interpretation of its readings and the appropriate safety procedures to be followed in the presence of
radiation.
1
The VeriDose V is compatible with VeriDose diodes as well as most industry standard radiation sensitive
diodes. VeriDose diodes are available to cover a wide range of energies. These diodes feature a hemispherical shape for improved surface contact with the patient. The model numbers for the VeriDose
diodes are shown in the accessories table.
The VeriDose V may be used with continuous and pulsed radiation beams (Cobalt 60 and linear accelerators). The VeriDose V is well suited for use with both static and dynamic wedge fields as well as irregular
fields and MLC applications.
The VeriDose V features a backlit LCD (Liquid Crystal Display) and a menu driven user interface. A
keypad with 5 soft-keys, a scroll up, scroll down and enter key provide for easy navigation through the
menu structure. An ON/OFF switch, power input connector and RS-232 serial port are located on the right
side panel. The rear panel contains the five BNC connectors for the diode inputs and a parallel printer
port. Calibration data can be stored for 25 groups, containing up to five diodes each. These usercalibrated groups can be recalled and selected for subsequent measurements. User calibration and
treatment data can be transmitted to a printer or computer. An optional label printer is available for direct
printout of measured dose to affix to patient charts. A real-time clock provides a time and date stamp for
all measurements. The RAM (Random Access Memory) is backed-up by an internal 3.6 V, 370 mAh
lithium battery (P/N16-41).
1.2 Features
• Backlit Liquid Crystal Display (LCD) and easy-to-use soft-key menu system
• Five independent detector channels with BNC connectors
• Automatic zeroing of each channel to minimize the effects of drift
• RS-232 serial port for computer interface
• Parallel printer interface
• User entered institution name printed on reports
• A group database containing up to 25 diode groups, with up to 5 diodes per group, may be
configured, labeled and calibrated by the operator for subsequent measurements.
• Provides an alarm setting for each individual channel
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Operators Manual
• Can be used as a stand-alone system without the need for a PC
1.3 Specifications
Input Circuitry Five bi-polar electrometer channels w/digital zeroing and gain control
Rate Range 1.0 cGy/min to 9999 cGy/min **
Dose Range 0.1 cGy to 9999 cGy
Sensitivity Adjustment 1 nC/cGy nominal, calibration range: 0.1 nC/cGy to 10 nC/cGy
Display 240 x 64 dot Liquid Crystal Display (LCD) 8 line x 40 characters, with
CCF backlight
Clock Real Time Clock, battery operated, US or Euro format
Alarm User selectable alarm level for each channel
User Controls On-off switch
5 column select soft-keys for control functions
Scroll up, scroll down and enter key for data entry
User Setup Parameters Stored in non-volatile, battery-backup RAM
Computer Interface RS-232, 19.2 BAUD, 8, N, 1
Data format: standard-decimal points, or Euro-style commas
Printer Interface Parallel, selectable drivers for LaserJet III and later, with ASCII (text)
output compatible with most other printers, RS-232 Serial Port used for
Label printer
Report Types Treatment label Treatment report
Flatness/Symmetry report
Energy constancy report
Calibration report
Operating Temperature 50° to 86°F (10° to 30°C)
Relative humidity: 5 to 95% non-condensing
Weight 2.5 lbs. (1.2 kg)
Size 9 (w) x 8.5 (d) x 2.5 in (h) (22.9 x 21.6 x 6.4 cm)
EMI shielded
Power 120 VAC, 60 Hz or 230 VAC, 50 Hz to 12 VDC @ 1A AC adapter, UL,
CSA, CE
** The rate range is dependent upon diode sensitivity and beam characteristics. The maximum input
charge cannot exceed 7nC per 100mS for negative polarity diodes, or 2.5nC per 100mS for positive
polarity diodes.
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Introduction
Accessories
1.4 Accessories
Supplied with VeriDose V
Description Part Number
One of the following, Power converter 12 VDC
@ 1A
Input – 120 VAC, 60 Hz, 22 W (US, Canada) 14-328
Input – 230 VAC, 50 Hz, 22 W (Europe) 14-401
Input – 240 V AC, 50 Hz, 21.2 W (UK) 14-414
Input – 240 VAC, 50 Hz, 21.2 W (Australia) 14-414 and 14-416
Cable, RS-232 88-446-7000
VeriDose Excel Add-In 37-705-2100 (9437705XL)
9-pin D-Sub to RJ11 adapter 88-705-1106 (173072)
Diode extension cable, 10 m 88-490 (Qty: 2)
Printer Cable 88-705-1100 (50-138)
Optional Accessories
Description Part Number
Label printer 37-705-1101
Additional labels 81-705-1100
Adaptor, 9-pin D-Sub to RJ11, Male 88-705-1105 (173073)
Cable, RS-232 88-446- 7000
Diode extension cable, 10 m 88-490
Diode and extension cable, 3 m 88-490-1000
VeriDose Diodes
Description Part Number
1 MV to 4 MV photon diode, Blue 30-471-8000
5 MV to 11 MV photon diode, Yellow 30-472-8000
12 MV to 17 MV photon diode, Red 30-473-8000
18 MV to 25 MV photon diode, Green 30-474-8000
6 MeV to 25 MeV electron diode, Gray 30-475-8000
Dual purpose phantom, Flat/sym. and energy
check
Calibration fixture 37-705-4000
Diode extension cable, 10 m 88-490
Diode Holder, 5 slot 30-492-1000
Calibration Jig, 5 slot 30-492-5200
VeriDose QC Phantom 37-705-7000
Acrylic slab 9.85 in SQ x 2 cm 37-705-7061
Acrylic slab 9.85 in SQ x 1 cm 37-705-7062
Acrylic slab 9.85 in SQ x .5 cm 37-705-7063
VeriDose acrylic slab set 37-705-7069
Cable assembly, 50 ft 37-705-7300
Cable assembly, 80 ft 37-705-7301
37-705-5000
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1.5 Receiving Inspection
Upon receipt of the unit:
1. Check the packaging and its contents for damage. If damage is evident, file a claim with the carrier
and contact Fluke Biomedical at 440.248.9300 for further instructions.
2. Remove the packaging and visually inspect the unit for damage.
3. Check that all items on the packing list have been received and are in good condition.
If items are missing or damaged, contact Fluke
Biomedical at 440.248.9300 for further instructions.
1.6 Storage
If the unit is to be stored prior to use, pack it in the original container, if possible, and store in an environment free of corrosive materials, fluctuations in temperature and humidity, and vibration and shock.
Prior to use, check the condition and functionality of the device. Also check that the calibration is still
valid. Periodic re-calibration is usually required by individual radiation safety and/or quality assurance
programs. Please consult your local radiation safety or quality assurance office if you have any questions.
1.7 Routine Cleaning
Do not immerse the Model 37-705 VeriDose V. The
unit is not waterproof. Liquid could damage the
internal circuitry. The unit should be kept clean and
free from dirt and contamination. The unit may be
cleaned by wiping with a damp cloth using any
commercially available cleaning or decontamination
agent.
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Introduction
Procedures, Warnings, and Cautions
1
1.8 Procedures, Warnings, and Cautions
The equipment described in this manual is intended to be used for the detection and measurement of
ionizing radiation. It should be used only by persons who have been trained in the proper interpretation of
its readings and the appropriate safety procedures to be followed in the presence of radiation.
Although the equipment described in this manual is designed and manufactured in compliance with all
applicable safety standards, certain hazards are inherent in the use of electronic and radiometric
equipment.
WARNINGS and CAUTIONS are presented throughout this document, when applicable, to alert the user
to potentially hazardous situations. A WARNING is a precautionary message preceding an operation
that has the potential to cause personal injury or death. A CAUTION is a precautionary message
preceding an operation that has the potential to cause permanent damage to the equipment and/or loss
of data. Failure to comply with WARNINGS and CAUTIONS is at the user’s own risk and is sufficient
cause to terminate the warranty agreement between Fluke Biomedical, Radiation Measurement Services
and the customer.
Adequate warnings are included in this manual and on the product itself to cover hazards that may be
encountered in normal use and servicing of this equipment. No other procedures are warranted by Fluke
Biomedical. It shall be the owner’s or user’s responsibility to see to it that the procedures described here
are meticulously followed, and especially that WARNINGS and CAUTIONS are heeded. Failure on the
part of the owner or user in any way to follow the prescribed procedures shall absolve Fluke Biomedical
and its agents from any resulting liability.
Indicated battery and other operational tests must be performed prior to each use to assure that the
instrument is functioning properly. If applicable, failure to conduct periodic performance tests in
accordance with ANSI N323-1978 (R1983) Radiation Protection Instrumentation Test and Calibration,
paragraphs 4.6 and 5.4, and to keep records thereof in accordance with paragraph 4.5 of the same
standard, could result in erroneous readings or potential danger. ANSI N323-1978 becomes, by this
reference, a part of this operating procedure.
1.9 Warning and Caution Summary
Warning Summary
The VeriDose V is intended to be used as a quality assurance device only. This product is not a primary
delivered dose measurement device and as such poses no known possible patient risk. Since this product
is an independent quality assurance device used for monitoring delivered dose, it plays no role
whatsoever in the administration of radiation to the patient and in no way affects the performance of the
radiation therapy system.
VeriDose V is intended as a readout for detector diodes (user supplied) used for the detection of ionizing
radiation, it should only be used by responsible persons who have the proper training in the interpretation
of its readings and the appropriate safety procedures to be followed in the presence of radiation.
Caution Summary
The VeriDose V is not to be used as a primary calibration device nor is it to be used as a part of a primary
calibration system. The operator must exercise caution and care when connecting detectors to the
VeriDose V and selecting user calibrated detector groups as these actions directly affect the accuracy of
the device. For this reason it is the operators' responsibility to clearly mark the diode and its' connector to
prevent connection to the wrong input channel and to select the appropriate user calibration group prior to
use.
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Operation
Menu Structure Overview
2
Section 2
Operation
2.1 Menu Structure Overview
2.1.1 General description
The VeriDose V provides a comprehensive menu structure allowing immediate access to frequently used
functions. The five keys, located below the display, relate to the displayed functions in each of the respective columns for selection and control. These keys are referred to as "soft-keys" since their operation at
any given time depends on the menu being displayed. The three keys to the right of the display, up and
down arrows and enter key, control scrolling and entry operations. A group database containing up to 25
diode groups, with up to 5 diodes (channels) per group may be configured, labeled and calibrated by the
operator for subsequent measurements. The following section describes in detail the operation of the
menu functions. Menu items shown in italics throughout the manual indicate user-entered names.
2.1.2 Menu operation
The "main" menu screen is shown below (Measure Dose screen #1). The VeriDose V's mode of operation
is controlled from this mode select screen. There are 5 column control keys located directly below the
display. The first key on the left is the "mode" key. Pressing the mode key at any time returns to the mode
select screen and selects the mode column. The selected column is indicated by the presence of the
menu cursor (blinking reverse video) within the column. Pressing the mode key again will move the blinking menu cursor up through the column of available modes: MEASURE, SELECT, SETUP and CAL
(calibrate). Pressing the up or down arrow keys moves the menu cursor up or down through the available
modes. As the cursor moves, all of the options available for that mode are displayed in the columns to the
right.
Pressing a soft-key to the right of the mode key moves the blinking menu cursor into the selected column.
Pressing the soft-key again will move the blinking menu cursor up through the column of available options. Pressing the up or down arrow keys moves the menu cursor up or down through the selected
column of available options. After options have been highlighted, the enter key may be pressed to start
the selected mode with the selected options. Pressing the mode key at any time returns to the mode
select screen.
Under various conditions message boxes will appear in the lower right corner of the display. These
messages provide special instructions and/or status information.
Dose Screen #1
MEASURE DOSE group name
SELECT RATE 1 ON
SETUP ALARMS 2 ON
CAL REPORT 3 OFF
4 OFF
5 OFF
MODE OPTION CHANNEL STATUS
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2.1.3 Start-up Screen
When the VeriDose V is powered up the startup screen is displayed while the unit performs a self-test.
This test includes a non-destructive, read/write Ram memory test and a RS-232 loop-back test. If an error
occurs, refer to Appendix B for error messages.
2.1.4 Getting Started
This section describes the step-by-step process of making connections to the VeriDose V and calibrating
a diode group for initial measurements. For detailed descriptions of all the VeriDose V features refer to
the MODES section of this manual.
2.1.5 Setup
Connect the power converter supplied with the VeriDose V, 12 VDC @ 1A, to the readout and a
convenient power outlet.
2.1.6 Connecting to a Computer
A PC may be connected to the VeriDose V by connecting the supplied cable, RJ11 (modular phone type
connector) to the RS-232 jack on the VeriDose and the 9-pin female D-Sub to an available com port on
the computer. The interface can easily be tested using either Terminal mode in Windows 3.1,
Hyperterminal in Windows 95 or any suitable communications program. The appropriate com port and the
communications parameters, 19.2k BAUD, 8 data bits, no parity and 1 stop bit are selected via the PC
communication program. Upon power up of the VeriDose V, a startup message will be transmitted to the
computer.
The Excel Add-In supplied with the VeriDose V provides an easy method of downloading the readings
into the Excel spreadsheet. The instructions for installing and running the add-in are found on the
installation disk in the README.TXT file. This file is a text file and may be viewed using a suitable word
processor program.
The Serial (RS-232) port on the VeriDose V may be
used for either a computer connection or the label
printer connection. When the label printer is
selected, via the setup printer menu, computer
communications are suspended. An alternative
printer must be selected to re-enable computer
communications.
2.1.7 Connecting to a Printer - Reference: SETUP-PRINTER
The VeriDose V system produces several types of reports compatible with most printers. The SETUP-PRINTER menu provides the option of selecting drivers for LaserJet III and later, Label (Seiko Model SLP
220) or ASCII output. The label connects to the VeriDose V RS-232 serial interface located on the right
side of the unit.
2.1.8 Connections
The printer port on the VeriDose V is located on the rear panel and is used for all printer connections
except the label printer. Connect the printer cable to the VeriDose V and the printer.
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Operation
Menu Structure Overview
The label printer is connected using the supplied cable with the RJ11 (modular phone type connector to
the RS-232 jack on the side of the VeriDose V and the 9-pin male D-Sub to the 9-pin female connector
supplied with the label printer.
2
2.2 Initial Calibration Group
2.2.1 Diode connection and calibration
Since the VeriDose V system displays the results of a dose measurement, the system must be calibrated
to a diode set or multiple sets prior to use. In order to calibrate the system, select the appropriate diode(s)
for the target energy. The sensitivity of each diode is unique and the calibration process will associate a
calibration factor for each diode to a specific channel. Therefore, it is necessary to assure that the correct
diode is connected to the appropriate channel for all subsequent measurements. If five or fewer diodes
are used, they may be left permanently attached to the VeriDose V. However, if multiple diode sets are
routinely used, a reliable method of assuring proper connection must be established.
Prior to beginning the calibration process it is necessary to become familiar with the operation of the
menus and data entry. Refer to Section 2.1.2, Menu Operation.
2.2.2 Calibration Process
1. Connect the diode(s), starting at channel 1 to the input connectors on the rear panel of the
VeriDose V.
2. Apply power to the unit by placing the ON/OFF switch, located on the right side of the unit, in the
ON position.
2.2.3 Adding a Diode Group
1. Scroll to the CAL menu item using the MODE key located below the first column. The second
column allows the entry of a password. Since a new password has not been entered, the default
password AAAA allows immediate access to the calibration functions. Press the ENTER key
located to the right of the display.
2. The first step in the calibration process is to add a calibration group. A group represents a particular
set of diodes that will be stored in the calibration database. Select a name for the new group such
as "6X" or "6E". Select ADD in the OPTION column. Press the NAME soft-key to select the first
character of the name. Repressing the NAME soft-key will move the cursor to the next character
position. Enter the group name by pressing the UP or DOWN keypads to the right of the display to
scroll though the character set and press the column 3 soft-key to move the cursor to the next
character position. After the name has been entered press the ENTER key.
2.2.4 Entering the Database Information
1. Each channel that has a diode connected must be activated by scrolling to each individual channel
number in the second column and selecting YES in the third column. The fourth column displays
the database items and fifth column allows the user to enter the identifiers for each of these items.
The database items are printed on each report for record keeping purposes.
2. Select channel 1 and enter the Serial number of the diode connected to channel 1. Press the softkey below column 5 to scroll the cursor to the right and use the UP and DOWN keys to the right of
the display to enter the appropriate serial number. A blank space can be entered by scrolling down
from "A".
3. Press the OPTION soft-key (column 4) to select the Modality item. Press the soft-key below column
5 and use the UP and DOWN keys to the right of the display to enter the appropriate modality label.
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4. Press the OPTION soft-key (column 4) to select the Energy item. Press the soft-key below column
5 to scroll the cursor to the right and use the UP and DOWN keys to the right of the display to enter
the appropriate energy.
5. Press the OPTION soft-key (column 4) to select the Machine item. Press the soft-key below column
5 to scroll the cursor to the right and use the UP and DOWN keys to the right of the display to enter
the appropriate machine label. A blank space can be entered by scrolling down from "A".
6. Press the OPTION soft-key (column 4) to select the Comment item. Press the soft-key below
column 5 to scroll the cursor to the right and use the UP and DOWN keys to the right of the display
to enter the appropriate comment. A blank space can be entered by scrolling down from "A".
7. Repeat this process for each channel that has a diode connected by pressing the column 2 soft-key
to access the related database items.
8. After completing the entry of all the database information press the ENTER key. Press the YES key
(column 4) to save the database information.
2.2.5 Performing the Calibration
1. The next step is to perform the calibration. Verify that the diodes are clustered near isocenter on the
treatment table. Scroll to the EXPOSE menu item by pressing the soft-key below the second
column. Select the GROUP of diodes you wish to expose by pressing the GROUP soft-key. Press
ENTER.
2. The display indicates the channel status for each of the 5 input channels. All channels that will be
calibrated at this time must indicate YES in the EXPOSE column. Press the column 2 soft-key to
select the channel and the column 3 soft-key to set the appropriate channels to YES. Upon
completion press the ENTER key.
3. The VeriDose V is ready for a calibration exposure. Make a minimum exposure of 100 cGy. After
the exposure, press the DONE soft-key (column 5).
4. The results of the measurement are displayed. Enter the actual exposure in cGy by pressing the
UP or DOWN keys to increment the value at the cursor position. Press the ENTER key to move the
cursor to the next digit. After entering the actual exposure the sensitivity for each channel is
calculated and displayed as nC/cGy. Press the YES soft-key (column 4) to save the calibration
factors in the group database.
5. The new group is now calibrated and the system may be used for additional measurements.
This process may be repeated for each diode group that will be used with the VeriDose V.
6. To make a routine measurement, scroll to the MEASURE menu item by pressing the mode softkey. Select the dose option by pressing the OPTION soft-key and scrolling to the DOSE menu item.
Press the ENTER key.
2.3 Measure Modes
Dose
Dose Screen #1
MEASURE DOSE group name
SELECT RATE
SETUP ALARMS
CAL REPORT
MODE OPTION
2-4
1 ON
2 ON
3 OFF
4 OFF
5 OFF
CHANNEL Status
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Operation
Measure Modes
Dose screen #1 shows the display format prior to a dose measurement. The group name displayed is the
name of the previously selected group. The
are activated (ON). To make a dose measurement, a group must be selected and at least one channel of
that group must be calibrated and activated (see SELECT - GROUP).
To begin a dose measurement, press the ENTER key. The message “PLEASE WAIT” will be
displayed while the unit zeroes the channel signals. After the channels are zeroed, the VeriDose
V beeps and dose screen #2 will be displayed. If a channel is not zeroed correctly, "ZERO ERR"
will be displayed to the right of the appropriate channel.
Dose Screen #2
ON/OFF status column indicates which diodes for that group
2
104.3
Ch 1
cGy
99.8
Ch 2
cGy
0.0
Ch 3
OFF
cGy
ABORT
Dose screen #2 shows the display format during a dose measurement. When the signal from the active
diode(s) indicates the beginning of an exposure, the VeriDose V will start the exposure timer and continue
to acquire data.
The cumulative dose for each channel is displayed as the exposure is occurring. Channels that have
been disabled will indicate “OFF” to the right of the appropriate channel. Any channels that exceed the
dose set-point of an active alarm will flash (see MEASURE - ALARMS).
Pressing the DONE soft-key will conclude the measurement and stop the exposure timer. The
accumulated dose and "PRESS ANY KEY TO CONTINUE MESSAGE" will be displayed. Pressing the
ABORT soft-key will display a message box that allows the user to continue the exposure by pressing NO
or return to the MENU display by pressing YES.
If VeriDose V is in A-PRINT (auto-print) mode the message "PREPARING REPORT...PLEASE WAIT” will
appear as the selected report is printed after each exposure (see SETUP - PRINTER).
Rate
Rate screen # 1
0.0
0.0
Ch 4
cGy
Ch 5
OFF
OFF
cGy
DONE
MEASURE
SELECT
DOSE
RATE
1 ON
group Name
SETUP ALARMS 2 ON
CAL REPORT 3 OFF
4 OFF
5 OFF
MODE OPTION CHANNEL STATUS
Rate screen #1 shows the display format prior to a rate measurement. The group name displayed is the
name of the previously selected group. The ON/OFF status column indicates which diodes for that group
are activated (ON). To make a rate measurement, a group must be selected and at least one channel of
that group must be calibrated and activated (see SELECT - GROUP).
To begin a rate measurement, press the ENTER key. The message “PLEASE WAIT” will be displayed
while the unit zeroes the channel signals. After the channels are zeroed, the VeriDose V beeps and dose
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Rate screen #2 will be displayed. If a channel is not zeroed correctly, “ZERO ERR” will be displayed to
the right of the appropriate channel.
Rate Screen #2
104.3
Ch 1
cGy
99.8
Ch 2
cGy
0.0
Ch 3
OFF
cGy
ABORT
Rate screen #2 shows the display format during a rate measurement. When the signal from the active
diode(s) indicates the beginning of an exposure, the VeriDose V will start the exposure timer and continue
to acquire data.
The instantaneous rate for each channel is displayed as the exposure is occurring. The cumulative dose
for each channel is measured in the background and although not displayed can be printed on reports.
Any channels that exceed the dose set-point of an active alarm will flash (see MEASURE - ALARMS).
Pressing the DONE soft-key will conclude the measurement and stop the exposure timer. The accumulated dose and "PRESS ANY KEY TO CONTINUE MESSAGE" will be displayed. Pressing the ABORT
soft-key will display a message box that allows the user to continue the exposure by pressing NO or to
return to the MENU display by pressing YES.
If VeriDose V is in A-PRINT (auto-print) mode the message “PREPARING REPORT...PLEASE WAIT” will
appear as the selected report is printed after each exposure (see SETUP - PRINTER). The reports
printed following a rate mode measurement will include the dose values only.
0.0
0.0
DONE
Ch 4
cGy
Ch 5
OFF
OFF
cGy
Alarms
Alarms Screen
MEASURE
DOSE
1 000.0 cGy OFF
SELECT RATE 2 000.0 cGy OFF
SETUP
ALARMS
3 000.0 cGy OFF
CAL REPORT 4 000.0 cGy OFF
5 000.0 cGy ON
MODE OPTION CHANNEL LEVEL STATUS
The Alarm screen permits alarm levels to be set and enabled or disabled for any given exposure by
individual channel. Alarm levels and status settings apply to all groups. Pressing the soft-key under the
CHANNEL column will move the highlight to the next channel. Pressing the soft-key under the LEVEL
column will cause the cursor to appear under the most significant digit of the highlighted alarm level. The
UP and DOWN keys changes the number. Pressing the STATUS column will toggle the highlighted
STATUS ON/OFF. Pressing the MODE soft-key or OPTION soft-key will exit this screen with the
highlighted items selected. All menu selections are maintained in non-volatile memory and will be
maintained when the power to the instrument is turned off. The default from the factory is alarm channel
STATUS OFF.
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Page 17
Reports
Report Screen
Operation
Measure Modes
2
MEASURE
SELECT RATE
SETUP ALARMS
CAL
DOSE TRTFULL
REPORT
FLT/SYM
E-
CONST
TRTLABL
MODE OPTION TYPE
The report screen is used to select the type of report to be printed. The selected report can be manually
or automatically printed following an exposure. Automatic printing is activated by turning the A-PRINT
function ON (ref. SETUP - PRINTER). To manually print a report based on the last exposure, select
report type and press the ENTER key.
There are four types of reports that can be printed directly from the VeriDose V. The default is the
previously selected report type.
• TRTFULL Full treatment report
• TRTLABL Treatment report for label printer only
• FLT/SYM Flatness and symmetry report
• E-CONST Energy constancy report
See the Appendices for sample reports.
2.4 Select Mode
Calibration Groups
Select Screen
MEASURE
SELECT
group name
2 ON
SETUP
CAL 4 OFF
5 OFF
MODE GROUP CHANNEL STATUS MORE
In the SELECT - GROUP mode the operator can select a group of previously calibrated diodes. The UP
and DOWN keys may be used to scroll through the previously entered group names. The MORE soft-key
allows the operator to review the calibration data for each individual diode in the group. The operator
entries for MACHINE, MODALITY, ENERGY, COMMENT, STATUS, SER/NUM, CAL FAC, and DATE
(calibration date) are displayed via the MORE soft-key. When the channel STATUS is being displayed,
the highlighted channel can be toggled ON or OFF by pressing the STATUS soft-key. The highlighted
channel can be changed by pressing the CHANNEL soft-key.
1 ON
3 OFF
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Operators Manual
2.5 Setup Modes
Printer
Printer Setup Screen
MEASURE
SELECT DAT/TIM
SETUP
CAL PASSWRD
NAME
DATA
MODE OPTION TYPE OPTION
The PRINTER setup screen permits selection of the printer type. The LASRJET refers to the Hewlett
Packard LaserJet III and later series printers, and LABEL refers to a Seiko label printer. The ASCII selection provides a text only output compatible with most printers. The A-PRINT feature, toggled ON or OFF
by pressing the A-PRINT soft-key, allows automatic printing of a report upon completion of an exposure
by pressing the DONE soft-key. The GRID option allows the grid in the report to be turned on or off. This
option applies to ASCII type printer only. The TEST option causes a test report to be sent to the printer to
verify correct printer operation. The test report formats are shown in Appendix A.
PRINTER
QAPHANT LABEL TEST
LASRJET
ASCII
A-PRINT ON
GRID
APRINT
When the label printer is selected, the RS-232 port
computer communications (via the RS-232 port)
are automatically disabled. To re-enable computer
communication select the ASCII or LASERJET
printer.
Date/Time
Setup Date/Time Screen
Measure Printer
Select
Setup
DAT/TIM
QAPHANT
US 02/25/97 10:15
EURO
CAL PASSWRD
Name
Data
Mode Option Style Date Time
This screen permits the date and time to be entered. The time is entered in 24 hour format. The U.S. style
permits the date to be entered in month/day/year format while the EURO style allows for the day/month/
year format. Press the appropriate column soft-key to move the cursor within the column and the UP and
DOWN keys to increment or decrement the digit at the cursor position. Press the ENTER key to apply the
changes. The time and date setting is used to time/date stamp the measurements and printed on the
reports
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Page 19
2.6 QA Phantom
Setup QA Phantom Screen # 1
Operation
QA Phantom
2
MEASURE PRINTER
SELECT DAT/TIM
SETUP QAPHANT
FLT/SYM 10 cm sq
E-
CONST
CAL PASSWRD
NAME
DATA
MODE OPTION TYPE FIELD
This screen permits data regarding flatness/symmetry reports to be selected. The field size associated
with the measurement can be selected by the operator. The field size selections are 10, 15, 20, 25, and
30 cm sq. When using the VeriDose QC phantom the field size must be set to 20 cm sq. The field size is
printed on the flatness/symmetry report.
Setup QA Phantom Screen # 2
MEASURE PRINTER FLT/SYM 1 xx.x cm
SELECT DAT/TIM
SETUP QAPHANT
E-
CONST
2 xx.x cm
3 xx.x cm
CAL PASSWRD 4 xx.x cm
NAME 5 xx.x cm
DATA
MODE OPTION TYPE Channel Depth
This screen permits data regarding energy constancy reports to be entered. The depth associated with
each detector (channel) can be entered by the operator. Select the channel with the CHANNEL soft-key.
Press the DEPTH soft-key to select the first digit of the depth. Repressing the DEPTH soft-key will move
the cursor to the next position. The depth selections can be entered in cm by pressing the UP and DOWN
keypads to the right of the display to scroll through the number set. The depth entry can range from 00.0
cm to 99.9 cm.
The depth entries are printed on the depth dose report. When using the VeriDose QC Phantom enter the
depth for each channel as indicated:
Channel 1 12.5 cm
2 12.5 cm
3 12.5 cm
4 20.5 cm
5 4.5 cm
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Password
Setup Password screen
MEASURE PRINTER
AAAA AAAA
SELECT DAT/TIM
SETUP
CAL
QAPHANT
PASSWRD
NAME
DATA
MODE OPTION OLD NEW
This screen permits the operator to change the security password. The operator must enter the existing
password and a new password. The password is a 4 character, alpha-numeric entry. Press the OLD or
NEW soft-key to activate the column, and use the UP and DOWN keys to advance to the appropriate
character. Press the OLD or NEW soft-key to move the cursor to the next character position. Pressing the
ENTER key will save the password entry. The factory default password is AAAA.
Institution Name
Setup Name Screen
MEASURE PRINTER
AAAAAAAAAAAAAAAAAAAAAAA
SELECT DAT/TIM
SETUP
QAPHANT
CAL PASSWRD
NAME
DATA
MODE OPTION ENTER INSTITUTION NAME
This screen permits the operator to enter an institution name of up to 23, alpha-numeric characters.
Select the ENTER INSTITUTION NAME soft-key and use the UP and DOWN keys to advance to the
appropriate character. Press the ENTER INSTITUTION NAME soft-key to move the cursor to the next
character position. The institution name is printed on the reports.
Data Format
Setup Data screen
MEASURE PRINTER
US
SELECT DAT/TIM EURO
SETUP
QAPHANT
CAL PASSWRD
NAME
DATA
MODE OPTION STYLE
This screen permits the operator to select the data format as US or European. The US format provides
decimal points for the data while the EURO format provides commas in place of the decimal points. Press
the STYLE soft-key scroll to the appropriate format.
2-10
Page 21
Operation
Calibrate Modes
2
2.7 Calibrate Modes
Calibrate Screen #1
MEASURE
AAAA
SELECT
SETUP
CAL
MODE PASSWRD
The operator must enter the security password in order to access the calibration features of VeriDose.
Enter the correct, 4 digit, alpha-numeric password and press the ENTER key (see SETUP PASSWORD).
Add A Group
Calibrate Screen # 2
MEASURE
ADD AAAAAAA
SELECT EDIT
SETUP DELETE
CAL
EXPOSE
REPORT
MODE OPTION NAME
The ADD option allows the operator to add new groups to the calibration data base. Up to 25 groups of
detectors, each with unique calibration factors, may be entered into the data base. The group name is
used as a unique identifier for a set of diodes that are to be calibrated and later recalled for subsequent
measurements. The operator may enter up to 7 alpha-numeric characters as indicated by the AAAAAAA
field. Select ADD in the OPTION column. Press the NAME soft-key to select the first character of the
name. Repressing the NAME soft-key will move the cursor to the next character position. Enter the group
name by pressing the UP and DOWN key pads to the right of the display to scroll through the character
set. After the name has been entered press the ENTER key.
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Calibrate Screen #3
group
name
1
2
NO
Yes
SER NUM AAAAAAA
MODALITY ELECTRON
3 ENERGY 000
4 MACHINE AAAAAAA
5 COMMENT AAAAAAA
GROUP CHANNEL DIODE OPTION
After entering a new group name the items in the database are displayed. Each group may include from
one to five diodes. The operator must activate each channel individually, assign a diode to that channel
by selecting YES in the diode column, or de-activate the channel by selecting NO. The database
information regarding each diode in the set is displayed along the right side of the selected channel. The
information is only displayed for active diodes (indicated by YES in the diode column).
The SER/NUM entry allows the operator to record the serial number of the diode for the selected channel.
The MODALITY (modality) entries, selected by the scroll UP and scroll DOWN key, include ELECTRON,
PHOTON and CO60. The energy entry allows the operator to enter the target energy for the selected
diode (the energy at which the diode is calibrated). The machine entry may contain the name of the
machine used with the selected diode. The comments field may be used to enter a 7-character alphanumeric comment regarding the selected diode. The entries in the database are printed in various reports
for record keeping purposes.
Entering the Database Information:
1. Each channel that has a diode connected must be activated by scrolling to each individual channel
number in the second column and selecting YES in the third column. The fourth column displays
the database items and fifth column allows the user to enter the identifiers for each of these items.
The database items are printed on each report for record keeping purposes.
2. Select channel 1 and enter the Serial number of the diode connected to channel 1. Press the softkey below column 5 to scroll the cursor to the right and use the UP and DOWN keys to the right of
the display to enter the appropriate serial number. A blank space can be entered by scrolling down
from "A".
3. Press the OPTION soft-key (column 4) to select the Modality item. Press the soft-key below column
5 and use the UP and DOWN keys to the right of the display to enter the appropriate modality label.
4. Press the OPTION soft-key (column 4) to select the Energy item. Press the soft-key below column
5 to scroll the cursor to the right and use the UP and DOWN keys to the right of the display to enter
the appropriate energy.
5. Press the OPTION soft-key (column 4) to select the Machine item. Press the soft-key below column
5 to scroll the cursor to the right and use the UP and DOWN keys to the right of the display to enter
the appropriate machine label. A blank space can be entered by scrolling down from "A".
6. Press the OPTION soft-key (column 4) to select the Comment item. Press the soft-key below
column 5 to scroll the cursor to the right and use the UP and DOWN keys to the right of the display
to enter the appropriate comment. A blank space can be entered by scrolling down from "A".
7. Repeat this process for each channel that has a diode connected by pressing the column 2 soft-key
to access the related database items.
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Page 23
Calibrate Screen # 4
Operation
Calibrate Modes
2
group
name
1
2
3
NO SER NUM AAAAAAA
Yes
MODALITY ELECTRON
ENERGY 000
4 MACHINE AAAAAAA
5
GROUP CHANNEL DIODE
After completing the entry of all the database information press the ENTER key. Press the YES key
(column 4) to save the database information.
Edit an Existing Group
Calibrate Screen # 5
MEASURE ADD
SELECT
EDIT
group
name
SAVE CHANGES
TO group name?
YES NO
SETUP DELETE
CAL
EXPOSE
REPORT
MODE OPTION GROUP
The EDIT option may be used to edit the database for the selected group. After selecting the EDIT option,
the operator may scroll through the existing groups by pressing the GROUP soft-key and pressing the UP
or DOWN key pads to the right of the display to scroll through the group names. After the group has been
selected press the ENTER key.
Calibrate Screen #6
group
name
2
NO
Yes
SER NUM AAAAAAA
MODALITY ELECTRON
3 ENERGY 000
4 MACHINE AAAAAAA
5 COMMENT AAAAAAA
GROUP CHANNEL DIODE OPTION
After selecting the group to be edited, the items in the database are displayed. The operator may activate
each channel individually, assign a diode to that channel by selecting YES in the diode column, or deactivate the channel by selecting NO. The database information regarding each diode in the set is displayed along the right side of the selected channel. The information is only displayed for active diodes
(indicated by YES in the diode column).
The SER/NUM entry allows the operator to record the serial number of the diode for the selected channel.
The MODALITY (modality) entries, selected by the scroll up and scroll down key, include ELECTRON,
PHOTON and CO60. The ENERGY entry allows the operator to enter the target energy for the selected
diode (the energy at which the diode is calibrated). The MACHINE entry may contain the name of the
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machine used with the selected diode. The COMMENTS field may be used to enter a 7-character alphanumeric comment regarding the selected diode. The entries in the database are printed in various reports
for record keeping purposes.
Entering the Database Information:
1. Each channel that has a diode connected must be activated by scrolling to each individual channel
number in the second column and selecting YES in the third column. The fourth column displays
the database items and fifth column allows the user to enter the identifiers for each of these items.
The database items are printed on each report for record keeping purposes.
2. Select channel 1 and enter the Serial number of the diode connected to channel 1. Press the softkey below column 5 to scroll the cursor to the right and use the UP and DOWN keys to the right of
the display to enter the appropriate serial number. A blank space can be entered by scrolling down
from "A".
3. Press the OPTION soft-key (column 4) to select the Modality item. Press the soft-key below column
5 and use the UP and DOWN keys to the right of the display to enter the appropriate modality label.
4. Press the OPTION soft-key (column 4) to select the Energy item. Press the soft-key below column
5 to scroll the cursor to the right and use the UP and DOWN keys to the right of the display to enter
the appropriate energy.
5. Press the OPTION soft-key (column 4) to select the Machine item. Press the soft-key below column
5 to scroll the cursor to the right and use the UP and DOWN keys to the right of the display to enter
the appropriate machine label. A blank space can be entered by scrolling down from "A".
6. Press the OPTION soft-key (column 4) to select the Comment item. Press the soft-key below
column 5 to scroll the cursor to the right and use the UP and DOWN keys to the right of the display
to enter the appropriate comment. A blank space can be entered by scrolling down from "A".
7. Repeat this process for each channel that has a diode connected by pressing the column 2 soft-key
to access the related database items.
Calibrate Screen # 7
group
name
2
3
NO SER NUM AAAAAAA
YES
MODALITY ELECTRON
ENERGY 000
4 MACHINE AAAAAAA
5
GROUP CHANNEL DIODE
After completing the entry of all the data base information press the ENTER key. Press the YES key
(column 4) to save the database information.
SAVE CHANGES
TO group name?
YES NO
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Page 25
Delete a Group
Calibrate Screen # 8
Operation
Calibrate Modes
2
MEASURE ADD
group
name
SELECT EDIT
SETUP
CAL
DELETE
EXPOSE
REPORT
MODE OPTION GROUP
The DELETE option allows the operator to delete an existing group. To delete a group from the group
database select the GROUP soft-key and press the scroll up or scroll down key to review the groups.
Once the appropriate group has been selected press the ENTER key.
Calibrate Screen # 9
MEASURE ADD
group
name
SELECT EDIT
SETUP
CAL
DELETE
EXPOSE
REPORT
MODE OPTION GROUP
To delete the selected group, press the YES soft-key, to abort the delete process press the NO soft-key.
DELETE group
ARE YOU SURE?
YES
name
No
Making a Calibration Exposure – Calibrate Screen # 10
MEASURE ADD
group
name
SELECT EDIT
SETUP DELETE
CAL EXPOSE
REPORT
MODE OPTION GROUP
The EXPOSE option allows the operator to select an existing group and perform a calibration. Select the
GROUP soft-key, scroll to the desired group and press the ENTER key.
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Calibrate Screen # 11
group
name
1 YES
2 YES
3 YES
4 NO
5 N/A
GROUP CHANNEL EXPOSE
Prior to initiating a calibration sequence, the operator may select the diodes within a group that will be
calibrated. The expose column shows the diode(s) that are to be calibrated by YES and the diode(s) that
are not to be calibrated by NO. Any channel(s) that have not been activated by the operator in either the
CALIBRATE - ADD or the CALIBRATE - EDIT options are indicated by N/A (not available). After the
appropriate selections have been made press the ENTER key.
The message "PLEASE WAIT' will be displayed while the unit zeroes the channel signals. After the channels are zeroed, the VeriDose V beeps and Calibrate Screen #12 will be displayed. If a channel is not
zeroed correctly, "ZERO ERR" will be displayed to the right of the appropriate channel. The cumulative
dose for each channel is displayed as the exposure is occurring.
Calibrate Screen # 12
104.3
cGy
Ch 2
Ch 1
99.8
cGy
Ch 3
55.1
ABORT
Several successive exposures may be averaged (up to 1000 cGy) by simply exposing the detectors to
repetitive exposures while the VeriDose V remains in the measurement mode. Upon completion of the
exposure(s) the operator may press the DONE soft-key to proceed to the next calibration screen or press
the ABORT soft-key to terminate the calibration process. Calibration factors are calculated based on a
normalized sensitivity of 1.000 nC/cGy. If the calibration process is interrupted by a machine malfunction
it is necessary to re-start the calibration process from the beginning.
0.0
Ch 4 OFF
cGy
0.0 Ch 5 OFF
cGy
DONE
Calibrate Screen # 14
1 102.0
100.3 cGy
2 102.1
3 102.3
4
5
GROUP CHANNEL CGY
The result of each channel is displayed in cGy. Press the ACTUAL EXPOSURE soft-key to select the first
digit of the exposure. Repressing the ACTUAL EXPOSURE soft-key will move the cursor to the next digit
2-16
ACTUAL
EXPOSURE
Page 27
Operation
Calibrate Modes
position. Enter the actual exposure or the sum of multiple exposures (up to 1000 cGy) by pressing the UP
or DOWN keypads to the right of the display to scroll through the number set. After the exposure has
been entered, press the ENTER KEY.
Calibrate Screen # 15
2
group
name
1 1.157
2 1043
3 1.266
4
5
GROUP CHANNEL nC/cGy
The calibration factor for each channel (diode) is calculated and displayed. "Save calibrations factors?"
appears in the message box. To save the calibration factors, press the YES soft-key, to abort the calibration process without saving the new calibration factors press the NO soft-key.
Calibrate Screen # 16
MEASURE ADD
SELECT EDIT
SETUP DELETE
CAL
EXPOSE
REPORT
SAVE CAL
FACTORS?
YES No
MODE OPTION
The Calibration report is used to print the report. Press the OPTION soft-key and select REPORT. Press
the ENTER key to print the report. Calibration reports for all groups will be printed.
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Page 29
VeriDose QC Phantom
General Description
3
Section 3
VeriDose QC Phantom
3.1 General Description
The VeriDose QC Phantom is a device that, in conjunction with the VeriDose V and the VeriDose Excel
Add-In, may be used for daily QC checks performed on radiation therapy machines (linear accelerators).
The VeriDose QC utilizes five VeriDose diodes positioned in an acrylic phantom to measure beam constancy, flatness, symmetry and provide a depth dose check.
The VeriDose QC Phantom is configured for use in a standard 20 x 20 cm field. One detector is
positioned at the central axis and four detectors are positioned at 8 cm off the central axis in both the X
and Y axis (80% of field size).
The phantom may be positioned on its edge with detector +Y closest to the gantry for depth dose measurements. In this mode detector +Y is located at a depth of 4.5 cm, detectors -X, central axis and +X are
located at a depth of 12.5 cm, and detector -Y is located at a depth of 20.5 cm.
The VeriDose QC Phantom is connected to the VeriDose V with a 15 m cable. The VeriDose V provides a
Flatness and Symmetry Report and an Energy Constancy (depth dose) Report based on the measurement results using the QC Phantom. For further description of these features refer to the Setup Modes
QA Phantom section of the manual.
In addition, the measurement results may be accessed by a PC operating under the VeriDose Excel AddIn. Graphs of beam constancy, flatness, symmetry and depth dose check are automatically generated.
For further description of these features refer to the VeriDose Excel Add-In manual (P/N VERIDOSEXL--
1).
3.2 VeriDose QC Phantom Specifications
Detector 5 diode detectors
Energy Range Photon: 4 to 25 MV
Electron: 5 to 25 Mev
3
Sensitive Volume 0.25 mm
Sensitivity 1.5 nC/cGy
Diode Polarity Negative
Rad damage @ 10 kGy < 15%
Operating Temperature 10°C to 40°C (50°F to 104°F)
Relative Humidity 5 to 95%, non-condensing
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Detector configuration
Flatness/Symmetry One central axis
(Horizontal orientation) Four - orthogonally positioned at 8 cm off central axis in the transverse
and radial planes.
Off-axis detectors are positioned at 80% of field size for flatness and
symmetry measurements.
Energy constancy Detector depth positions: 4.5, 12.5, 20.5 cm
(Vertical orientation)
Interface Cable 50 ft (15 m) P/N 37-705-7300
2
Build-up 1.9 cm acrylic (2.3 g/cm
Size 9.85 (w) x 9.85 (d) x 1.5 in (h) (25 x 25 x 3.8 cm)
Weight 5.25 lbs (11.6 kg)
)
3.3 Connection to the VeriDose V
Connect the VeriDose QC Phantom cable to the phantom and the VeriDose V as indicated:
Channel 1 Central axis Yellow
Channel 2 -X Red
Channel 3 +X Green
Channel 4 -Y Blue
Channel 5 +Y White
3.4 Setup
Refer to the Setup Mode - QA Phantom section of the manual for detailed instructions regarding setup
parameters for the VeriDose QC Phantom.
3.5 Calibration
It is the responsibility of the user to calibrate the VeriDose system. It is recommended that the VeriDose
QC Phantom be calibrated under the conditions that represent normal daily use. Since the calibration
process will associate a particular detector to a specific channel on the VeriDose V, it is necessary to
connect the device properly (as indicated in the Connecting to the VeriDose V section) for the calibration
process as well as for subsequent measurements.
Reference the VeriDose Calibrate Modes section of the manual for a complete description of the calibration functions. Two methods of calibrating the VeriDose QC Phantom are described below:
Method 1
Calibrate all 5 detectors (channels) individually, centering each detector on the central axis at 100 cm
SSD. Place build-up material equal to or greater than Dmax depth over the detector. Use a small field
size of 5 x 5 cm and irradiate to a known calibration dose. Repeated exposures are recommended for
dose averaging, with a maximum cumulative dose of less than 1000 cGy.
Verify the calibration process by setting the recommended 20 x 20 cm field size and aligning the QC
Phantom's central diode with the central ray. Place calibration build-up over the entire phantom. Beam
3-2
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VeriDose QC Phantom
General Description
flatness and symmetry should be within the approximate tolerances as specified by AAPM guidelines
(TG-40).
3
Method 2
Calibrate all the detectors at the same time by aligning the QC Phantom's central diode with the central
ray. Set the 20 x 20 cm field size and align to the field outline on the QC Phantom. Set the distance to
100 cm SSD to the phantom surface and place build-up material equal to or greater than Dmax depth
over the entire phantom. Irradiate the phantom to a known calibration dose. Repeated exposures are
recommended for dose averaging, with a maximum cumulative dose of less than 1000 cGy. Note that this
method will yield a reference value of 0.0%, for flatness and symmetry, to be used only as QA baseline
values. These baseline reference values for flatness and symmetry will be relative to the actual values at
the time of calibration, therefore, special attention must be paid to setting correct tolerance levels. Initial
values for flatness and symmetry must be factored into the pass/fail criteria of the beam to conform to
AAPM guidelines (TG-40).
Calibrate each detector (channel), one at a time, positioned at isocenter. A typical exposure of 100 - 200
cGy at a dose rate of 100 to 300 cGy/min is adequate for calibration. Upon completion of the calibration
process, several additional exposures should be made in the normal measurement mode in order to verify
the calibration. To print the results, select the Flatness/Symmetry report on the VeriDose V.
3.6 Flatness and Symmetry Measurements
Position the VeriDose QC Phantom flat on the treatment table. Position the central axis chamber at
isocenter and align the X and Y crosshairs with the laser positioning system. Collimate the field size to 20
x 20 cm using the borders on the QC Phantom as a guide. To make measurements, follow the procedure
outlined in the VeriDose V Measure Modes - Dose section of the manual. A Flatness and Symmetry
Report may be printed by selecting the appropriate report in the Measure Reports menu and pressing the
ENTER key.
3.7 Depth Dose check
Position the VeriDose QC Phantom on its edge with Y + positioned closest to the gantry. Additional buildup may be placed against the sides of the phantom. Position the central axis chamber at isocenter and
align the X and Y crosshairs with the laser positioning system. Collimate the field size to 20 x 20 cm. To
make measurements, follow the procedure outlined in the VeriDose V Measure Modes - Dose section of
the manual. A Depth Dose Report may be printed by selecting the appropriate report in the Measure
Reports menu and pressing the ENTER key.
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Page 33
See the following pages.
Appendix
Reports
A
Appendix A
Reports
A-1
Page 34
FLATNESS/SYMMETRY REPORT
VeriDose V, Model number
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
Date: 03/30/1998
Time: 17:36:34
Detector Group: GROUP 2
Calibration Date(s): 03/30/1998 03/30/1998 03/30/1998 03/30/1998 03/30/1998
Diode Serial
Numbers:
Machine: LINAC LINAC LINAC LINAC LINAC
Modality: electron electron electron electron electron
Energy: 006 MeV 006 MeV 006 MeV 006 MeV 006 MeV
Field Size: 10.0 cm x 10.0 cm
Channel 1 Channel 2 Channel 3 Channel 4 Channel 5
MEASURED
DOSE (cGy)
POSITION
ASSIGNMENT
RATIO 1.000 1.003 1.006 1.002 1.008
1932 1933 1934 1935 1936
109.6 109.9 110.2 109.8 110.5
Center -X +X -Y +Y
37-705
X-Axis Flatness: 0.274%
Y-Axis Flatness: 0.418%
X-Axis Symmetry: 0.242
Y-Axis
Symmetry: 0.618
Average Measured Dose: 110.0 cGy
Signature:
Page 35
FLATNESS/SYMMETRY REPORT
VeriDose V, Model number
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
Date: 03/30/1998
Time: 17:36:34
Detector Group: GROUP 2
Cal Date (s): 03/30/1998 03/30/1998 03/30/1998 03/30/1998 03/30/1998
Diode S. N. (s): 1932 1933 1934 1935 1936
Machine: LINAC LINAC LINAC LINAC LINAC
Modality: electron electron electron electron electron
Energy: 006 MeV 006 MeV 006 MeV 006 MeV 006 MeV
Field Size: 10.0 cm x 10.0 cm
MEASURED
DOSE (cGy)
POSITION
ASSIGNMENT
RATIO 1.000 1.003 1.006 1.002 1.008
Channel
1
109.6 109.9 110.2 109.8 110.5
Center -X +X -Y +Y
Channel
2
37-705
Channel
3
Channel
4
Channel
5
X-Axis Flatness: 0.274%
Y-Axis Flatness: 0.418%
X-Axis Symmetry: 0.242
Y-Axis
Symmetry: 0.618
Avg. Measured Dose: 110.0 cGy
Signature:
Page 36
FLATNESS/SYMMETRY REPORT
VeriDose V, Model number
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
Date: 03/30/1998
Time: 17:36:34
Detector Group: GROUP 2
Cal Date (s): 03/30/1998 03/30/1998 03/30/1998 03/30/1998 03/30/1998
Diode S. N. (s): 1932 1933 1934 1935 1936
Machine: LINAC LINAC LINAC LINAC LINAC
Modality: electron electron electron electron electron
Energy: 006 MeV 006 MeV 006 MeV 006 MeV 006 MeV
Field Size: 10.0 cm x 10.0 cm
MEASURED
DOSE (cGy) 109.6 109.9 110.2 109.8 110.5
POSITION
ASSIGNMENT Center -X +X -Y +Y
RATIO
Channel 1 Channel 2 Channel 3 Channel 4 Channel
1.000
1.003
37-705
1.006
5
1.002
1.008
X-Axis Flatness: 0.274%
Y-Axis Flatness: 0.418%
X-Axis Symmetry: 0.242
Y-Axis
Symmetry: 0.618
Avg. Measured Dose: 110.0 cGy
Signature:
Page 37
ENERGY CONSTANCY REPORT
VeriDose V, Model number
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
Date: 03/30/1998
Time: 17:15:33
Detector Group: GROUP 2
Calibration Date(s): 03/30/1998 03/30/1998 03/30/1998 03/30/1998 03/30/1998
Diode Serial
Numbers:
Machine: LINAC LINAC LINAC LINAC LINAC
Modality: electron electron electron electron electron
Energy: 006 MeV 006 MeV 006 MeV 006 MeV 006 MeV
Normalization/Reference Depth: 1.5 cm
Channel 1 Channel 2 Channel 3 Channel 4 Channel 5
DEPTH
(cm)
READING
(cGy)
NORMALIZED
(percent)
1932 1933 1934 1935 1936
1.5 4.3 8.7 11.2 17.4
96.7 112.6 93.9 76.8 38.5
100.0 116.5 97.1 79.4 39.8
37-705
Signature:
Page 38
ENERGY CONSTANCY REPORT
VeriDose V, Model number
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
Date: 03/30/1998
Time: 17:15:33
Detector Group: GROUP 2
Cal Date (s): 03/30/1998 03/30/1998 03/30/1998 03/30/1998 03/30/1998
Diode S.N. (s): 1932 1933 1934 1935 1936
Machine: LINAC LINAC LINAC LINAC LINAC
Modality: electron electron electron electron electron
Energy: 006 MeV 006 MeV 006 MeV 006 MeV 006 MeV
Normalization/Reference Depth: 1.5 cm
DEPTH
(cm)
READING
(cGy)
NORMALIZED
(percent)
Channel
1
1.5 4.3 8.7 11.2 17.4
96.7 112.6 93.9 76.8 38.5
100.0 116.5 97.1 79.4 39.8
Channel
2
37-705
Channel
3
Channel
4
Channel
5
Signature:
Page 39
ENERGY CONSTANCY REPORT
VeriDose V, Model number
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
Date: 03/30/1998
Time: 17:15:33
Detector Group: GROUP 2
Cal Date (s): 03/30/1998 03/30/1998 03/30/1998 03/30/1998 03/30/1998
Diode S.N. (s): 1932 1933 1934 1935 1936
Machine: LINAC LINAC LINAC LINAC LINAC
Modality: electron electron electron electron electron
Energy: 006 MeV 006 MeV 006 MeV 006 MeV 006 MeV
Normalization/Reference Depth: 1.5 cm
DEPTH
(cm)
READING
(cGy)
NORMALIZE
D
(percent)
Channel 1 Channel 2 Channel 3 Channel
1.5
96.7
100.0
4.3
112.6
116.5
37-705
Channel
4
8.7 11.2 17.4
93.9
97.1 79.4 39.8
76.8
38.5
5
Signature:
Page 40
TREATMENT REPORT
VeriDose V, Model number
37-705
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
Patient
Name:
Patient
ID:
Date: 03/30/1998
Time: 17:05:36
Detector Group: GROUP 2
Calibration Date (s): 03/30/1998 03/30/1998 03/30/1998 03/30/1998 03/30/1998
Diode Serial
Numbers:
1932 1933 1934 1935 1936
Machine: LINAC LINAC LINAC LINAC LINAC
Modality: electron electron electron electron electron
Energy: 006 MeV 006 MeV 006 MeV 006 MeV 006 MeV
Elapsed Time: 59.2 sec
Channel 1 Channel 2 Channel 3 Channel 4 Channel 5
MEASURED
DOSE (cGy)
CORRECTION
FACTOR
CORRECTED
DOSE (cGy)
EXPECTED
DOSE (cGy)
PERCENT
DIFFERENCE
ALARM
LEVEL
ALARM LEVEL
EXCEEDED (Y/N)
103.1 93.8 88.8 4.8 3.1
100.0 100.0 100.0
YES NO NO DISABLED DISABLED
Signature:
Page 41
TREATMENT REPORT
VeriDose V, Model number
37-705
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
Patient
Name:
Patient
ID:
Date: 03/30/1998
Time: 17:05:36
Detector Group: GROUP 2
Cal Date (s): 03/30/1998 03/30/1998 03/30/1998 03/30/1998 03/30/1998
Diode S. N.(s): 1932 1933 1934 1935 1936
Machine: LINAC LINAC LINAC LINAC LINAC
Modality: electron electron electron electron electron
Energy: 006 MeV 006 MeV 006 MeV 006 MeV 006 MeV
Elapsed Time: 59.2 sec
MEASURED
DOSE (cGy)
CORRECTION
FACTOR
CORRECTED
DOSE (cGy)
EXPECTED
DOSE (cGy)
PERCENT
DIFFERENCE
ALARM
LEVEL
ALARM LEVEL
EXCEEDED (Y/N)
Channel
1
103.1 93.8 88.8 4.8 3.1
100.0 100.0 100.0
YES NO NO DISABLED DISABLED
Channel
2
Channel
3
Channel
4
Channel
5
Signature:
Page 42
TREATMENT REPORT
VeriDose V, Model number
37-705
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
Patient
Name:
Patient
ID:
Date: 03/30/1998
Time: 17:05:36
Detector Group: GROUP 2
Cal Date (s): 03/30/1998 03/30/1998 03/30/1998 03/30/1998 03/30/1998
Diode S. N. (s): 1932 1933 1934 1935 1936
Machine: LINAC LINAC LINAC LINAC LINAC
Modality: electron electron electron electron electron
Energy: 006 MeV 006 MeV 006 MeV 006 MeV 006 MeV
Elapsed Time: 59.2 sec
MEASURED
DOSE (cGy)
CORRECTION
Channel 1 Channel 2 Channel 3 Channel 4 Channel
5
103.1
93.8
88.8
4.8
3.1
FACTOR
CORRECTED
DOSE (cGy)
EXPECTED
DOSE (cGy)
PERCENT
DIFFERENCE
ALARM
100.0
100.0
100.0
LEVEL
ALARM LEVEL
EXCEEDED (Y/N)
YES
NO
NO
DISABLE
D
DISABLED
Signature:
Page 43
CALIBRATION REPORT
VeriDose V, Model number
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
37-705
Detector Group: GROUP 2
Channel 1 Channel 2 Channel 3 Channel 4 Channel 5
SERIAL
NUMBER
CALIBRATION
FACTOR
MACHINE LINAC LINAC LINAC LINAC LINAC
ENERGY 006 006 006 006 006
MODALITY electron electron electron electron electron
CALIBRATION
DATE
1932 1933 1934 1935 1936
1.152 1.244 1.176 1.226 1.205
03/30/1998 03/30/1998 03/30/1998 03/30/1998 03/30/1998
Signature:
Page 44
CALIBRATION REPORT
VeriDose V, Model number
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
37-705
Detector Group: GROUP 2
SERIAL
NUMBER
CALIBRATION
FACTOR
MACHINE LINAC LINAC LINAC LINAC LINAC
ENERGY 006 006 006 006 006
MODALITY electron electron electron electron electron
CALIBRATION
DATE
Channel
1
1932 1933 1934 1935 1936
1.152 1.244 1.176 1.226 1.205
03/30/1998 03/30/1998 03/30/1998 03/30/1998 03/30/1998
Channel
2
Channel
3
Channel
4
Channel
5
Signature:
Page 45
CALIBRATION REPORT
VeriDose V, Model number
Serial number 00000
Firmware revision 1.1 d, March 30, 1998
RADIATION ONCOLOGY
Detector Group: GROUP 2
SERIAL
NUMBER
CALIBRATION
FACTOR
MACHINE
ENERGY
MODALITY
CALIBRATION
DATE
Channel 1 Channel 2 Channel 3 Channel 4 Channel
1932
1.152
LINAC
006
electron
03/30/1998
03/30/1998
1933
1.244
LINAC
006
electron
electron
03/30/1998
1934
1.176
LINAC
006
37-705
1.226
LINAC
electron
03/30/1998
1935
006
1.205
LINAC
electron
03/30/1998
5
1936
006
Signature:
Page 46
VeriDose V
Label Printer Samples
Page 47
ASCII Printer Test Page…
Complete (8-bi) character set…
Column positioning test…
Grid
Test
If the above Grid Test is comprised of single and double lines, then the GRID option should be ON.
If the above Grid Test shows special symbols or accented alphabetic characters, then the GRID option
should be OFF. Note: With some printers, you may be able to select a default character set that includes
line drawing characters.
The ACSII printer GRID is currently ON.
Page 48
VeriDose V
Label Printer Test Label
Page 49
g
p
LaserJet Printer Test Page…
Roman-8, Proportional, 12 pt, Times Typeface…
Mar
in test…
erscript/Subscript test…
Su
Page 50
(Blank page)
Page 51
1.
Appendix
Error Messages
B
Appendix B
Error Messages
Checksum error 0x06FF
If the above message appears, note the error code and call Fluke Biomedical Technical Support at
440.248.9300.
2.
The above message indicates that internal RAM error occurred during startup. Restart the unit to verify
reset.
3.
The above message indicates that the communications has timed out. Verify the serial cable is secured at
both ends. Restart the unit.
PRESS ANY KEY TO CONTINUE…
18 Calibration groups were
reset due to checksum errors
PRESS ANY KEY TO CONTINUE…
RS-232 timed out
PRESS ANY KEY TO CONTINUE…
Group with this
4.
The above message appears when the name you have entered already exists. Enter a different name
and continue.
name already exists.
Please select a different name.
PRESS ANY KEY TO CONTINUE…
B-1
Page 52
Nuclear Associates 37-705
Operators Manual
5.
104.3
Ch 1
cGy
99.8
Ch 2
cGy
55.1
Ch 3
ABORT
If a channel is not zeroed correctly, “ZERO ERR” will be displayed to the right of the appropriate channel.
This could be caused by one of the following:
a. the diode is in a radiation beam while zeroing or
b. the diode may be defective.
Correct the problem and repeat the measurement.
0.0
0.0
Ch 4
cGy
Ch 5
cGy
OFF
OFF
DONE
B-2
Page 53
(Blank page)
Page 54
Fluke Biomedical
Radiation Management Services
6045 Cochran Road
Cleveland, Ohio 44139
440.498.2564
www.flukebiomedical.com/rms
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