Siemens MAMMOMAT Balance Troubleshooting Manual Download Page 45 | Manualshive

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Siemens MAMMOMAT Balance Troubleshooting Manual Download Page 45

Dose calculator

MAMMOMAT Balance

SPB7-115.840.01 Page 45 of 62

Siemens AG

Troubleshooting Guide

Rev.02 10.04

Medical Solutions

Dosemeter configuration

With this option you can set some operational parameters. Press the
"Edit"-"Dosemeter configuration" menu.

A window opens showing the current setting for this
parameters. Input desired values and press "OK" to
retain changes or "Cancel" otherwise.

Remeber to

"File"-"Save" modifications for permanently store
them.

DOSE FUNCTIONS

Dose shown on the LCD Display as well stored in the
memory for statistic purposes and print to the ID printer
can be enabled/disabled in the specific boxes.

PADDLE POSITION OFFSET

Measurement of x-ray Source to Skin distance is
extremely important for a correct Skin Dose
measurement.

After the above configuration of Focal Spot Position:

•

set Paddle Position Offset to zero

•

store configuration values into the Mammo unit

•

install a shifted compression paddle

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Summary of Contents for MAMMOMAT Balance

Page 1: ...1 01 02 X Siemens AG 2004 The reproduction transmission or use of this document or its contents is not permitted without express written authority Offenders will be liable for damages All rights including rights created by patent grant or registration of a utility model or_ design _are_ reserved English Doc Gen Date 10 04 ...

Page 2: ... office to order current revision levels Disclaimer The installation and service of equipment described herein is to be performed by qualified personnel who are employed by Siemens or one of its affiliates or who are otherwise authorized by Siemens or one of its affiliates to provide such services Assemblers and other persons who are not employed by or otherwise directly affiliated with or autho r...

Page 3: ...ROTATING ANODE STARTER 23 CALIBRATION OF PROTECTION CIRCUIT 23 FUNCTION CONFIGURATION 25 DEFAULT JUMPER SETTING 25 BRAKE DISABLE FOR HEAVY USE 25 FILAMENT 26 FILAMENT POWER SUPPLY 26 ANODE CURRENT CALIBRATION 28 CALIBRATION OF FILAMENT CURRENT PROTECTION 31 CALIBRATION OF FILAMENT VOLTAGE PROTECTION 31 ANODE CURRENT CHECK BY EXTERNAL DEVICE 32 HIGH VOLTAGE GENERATOR 33 DESCRIPTION 33 NON INVASIVE ...

Page 4: ...CE 52 CALIBRATION OF MAXIMUM COMPRESSION FORCE 52 MOTOR CURRENT DETECTOR 52 MOTOR OR CLUTCH REPLACEMENT 52 C ARM ROTATION BRAKE 53 BRAKE FORCE ADJUSTMENT 53 X RAY LIGHT FIELD ALIGNMENT PROCEDURE 54 ASSEMBLY DISASSEMBLY OF ORIGINAL TUBE 54 X RAY BEAM COLLIMATION 54 LIGHT BEAM ALIGNMENT 56 GAS SPRING REPLACEMENT 58 MAMMOMAT BALANCE EASY LABEL COMMUNICATION PROTOCOL 60 CHANGES TO PREVIOUS VERSION 62 ...

Page 5: ... x 38 gG 10A F7 5 x 20 CT 40mA F8 6 x 30 CT 100mA F9 10 x 38 gG 10A F10 6 x 30 CT 10A F11 6 x 30 CT 4A F12 6 x 30 CT 100mA PCB 03 186 F1 5 x 20 CT 500mA F2 5 x 20 CT 500mA PCB 03 188 F1 5 x 20 ET 1 6A F2 5 x 20 ET 1A F3 5 x 20 CT 0 5A F4 6 3x 32 GT 2A F11 5 x 20 ET 3 15A PCB 92 073 F1 6 3x 32 GT 1 6A F2 6 3x 32 GT 1 6A PCB 92 074 F1 6 x 30 CT 10A F2 6 x 30 CT 4A F3 5 x 20 CT 40mA INVERTER PCB 94 1...

Page 6: ...e Film Screen DIP6 OFF Not in use must remain OFF DIP7 ON Compression force calibration DIP8 ON Mo Rh filter enabled SW2 DIP1 ON C arm Brake disabled for service DIP2 ON Inverter Vdc input sense disabled DIP3 ON Max compression force 200N DIP4 ON Exposure start on left to right grid movement DIP5 OFF Future expansion PCB 92 083 Keyboard Language DIP1 DIP2 DIP3 DIP4 Italian OFF OFF OFF OFF French O...

Page 7: ...ing x ray LED3 YELLOW bright during x ray mAs meter pulses LED D1 RED IRQ activity monitor blinks in normal condition if bright fix CPU hanged UP LED DU1 YELLOW internal 2 5Vdc LED DU2 YELLOW internal 3 3Vdc LED DU6 RED ON at start UP during FPGA initialization LED DU8 RED ON during CPU initial reset LED DU11 YELLOW 5Vdc CPU Reset sequence At power ON LED DU6 and LED DU8 are bright LED DU8 goes OF...

Page 8: ...92 074 Color Function LED1 YELLOW Bright during tube running LED2 YELLOW Bright during brake or alarm LED3 YELLOW Bright during brake LED5 GREEN Bright in Stand by or rotation LED6 GREEN Bright during rotation Filament power supply PCB 92 073 Color Function LED1 GREEN Bright fix in normal condition LED2 RED don t care LED3 RED Bright when Small focal spot is selected LED4 GREEN Bright with filamen...

Page 9: ...O NO 08883436 KTFLA0206 INVERTER module Note 1 NO 08883444 KTFLI0009 H V Transformer Note 1 NO 08883451 PCB 01 170 X CPU Board NO YES 08883469 PCB 02 171 0 TUBE Temperature sensor NO NO 08883477 PCB 02 179 X C ARM Service board NO YES 08883485 PCB 03 181 X CPU Keyboard NO YES 08883493 PCB 03 186 X Service board NO YES 08883501 PCB 03 187 X Serial port connectors board NO NO 08883519 PCB 03 188 X C...

Page 10: ...shooting Guide Rev 02 10 04 Medical Solutions Collimator lamp replacement 1 Remove attachment of Face shield protection by means of four fixing screws 2 Open collimator assembly by removing the four fixing screws 3 replace lamp only with original spare part having the same filament orientation ...

Page 11: ...ation Keyboard PCB 92 083 03 181 has its own dedicated CPU At power ON empty frame is drawn by keyboard CPU on the display When main CPU of PCB 01 170 starts display frame is filled with icons Grid position initialization At power ON grid is moved to search home position and noise from the table is normal Grid home position is at left side from patient position Emergency shutdown Emergency push bu...

Page 12: ...en LED is blinking for all other conditions If cassette notch sensing switch is enabled Table internal jumper removed and cassette has no notch green Led is blinking even if cassette is properly inserted Grid tables If grid table is recognized x ray beam is pulsed Both large and small focus can be selected from the control panel Gridless tables If gridless table any kind is recognized x ray beam i...

Page 13: ...e is correct check keyboard 92 083 KEYBOARD CPU 03 181 cable CV0155 and supply voltages onboard of KEYBOARD 92 083 If the unit is operative fault finding and troubleshooting is based on the followings 1 Operating or technical errors on display 2 Technical menu 3 Technical errors in Log file 1 Operating errors on Display Operating errors on Display are described in the Operator s manual SPB7 115 62...

Page 14: ...investigation Note Alarm goes OFF by itself if normal condition is restored releasing pushbutton or foot pedal switch ALARM CHECK CASSETTE Code Ci When At power ON Why Cassette was inside the table and could be exposed Action Remove cassette check it and reinsert If alarm comes out without cassette inside check cassette sensing microswitches Note Alarm goes OFF by itself if normal condition is res...

Page 15: ...n Insert or replace cassette or check cassette sensing switches Note Alarm goes OFF by itself if cassette is inserted or removed ALARM MIRROR POSITION ERROR Code Me When Starting exposure Why Mirror is not out of field Action Check if mirror doesn t move totally or partially for mechanical or electrical problems Mirror drive motor has position sensing switch inside that must switch audible click w...

Page 16: ...lue and during exposure force cable connector and pushbutton to locate possible false contact Replace pushbutton Note Display shows exposure mAs and kV ALARM LOW ANODE CURRENT Code Bt When After exposure in MANUAL mode Why Anode current was below lower limit or zero Exposure has been terminated by Back Up Timer Action Check anode current calibration according to specific section of this manual Als...

Page 17: ...s too high and p value lower than limit selected during AEC calibration Breast could have silicone prosthesis Refer to AEC calibration procedure for p lower limit calibration Action Reduce breast density and check for AEC calibration with reference phantom Note Film must be replaced Delivered mAs are less than 1 mAs ALARM LOW mAs SELECTION WITH AEC Code Mi When After exposure Why Could happen with...

Page 18: ...Disable tube rotation brake ALARM TECHNICAL ERROR Code Refer to list When Any time Why Internal error having no meaning for the operator Action Check Log File to find out what it is Date and time of error fault can be helpful to locate it quickly 2 Technical menu When Any time Why Broken Fuse or defective block has been located by CPU diagnostic functions Action Check Log File to find out when it ...

Page 19: ...ey can be simulated by means of jumpers on the flat cable CV0173 Fault Rotating anode 92 074 FAIL Action 1 check LED status of PCB 92 074 2 if problem occurs when the unit is in stand by check that flat cable CV174 connecting PCB 92 074 and PCB 01 170 has been correctly seated Also check fuses F1 and F3 of PCB 92 074 3 if problem occurs in preparation error code is T1 check for line voltage protec...

Page 20: ...ed by means of DIP2 SW2 PCB 01 170 Vdc voltage sensing is connected at CN4 PCB 94 132 and CN9 PCB 03 188 connection cable is CV0164 Normal voltage across CN9 with cable CV0164 connected is about 19 5Vdc Voltage across CN4 PCB 94 132 is about 47 Vdc with CV0164 disconnected Vdc in drop is about 100Vdc during exposure and ripple in the same condition is typically 50 Vpp If Vdc drop and ripple voltag...

Page 21: ... three buttons alarm reset optical density plus and optical density minus contemporarily DEATA Plus software creates a LOG file that can be opened clicking on View Stat button Log file contains string with error code and full description in the last line Error log file can be selected between all those available identified by time and date of Upload Memory string The following string is an example...

Page 22: ...sample pulse x ray emission only CODE Fault description A0 BREAST TOO DENSE A1 AEC DETECTOR OVER EXPOSED Operating errors without x ray emission CODE Fault description D0 DOOR OPEN C0 ABSENCE OF COLLIMATOR CONE Nc CASSETTE NOT INSERTED Ci CASSETTE IN AT POWER ON Ce CASSETTE ALREADY EXPOSED T0 NOT ACTIVE System errors and or faults CODE Fault description Gs GAS SPRING DEFECTIVE Pb CHECK BRAKE PUSH ...

Page 23: ...x ray emission and tube anode loading High mAs value is selected to have stable voltage readings at Test points TP1 TP2 TP3 TP4 Use only isolated tools Anode starter PCB 92 074 has two independent protection circuits for direct and shifted phase Voltage at TP1 represents Direct phase current and voltage at TP3 represents minimum reference level normal operating conditions is with VTP1 VTP3 Voltage...

Page 24: ...ing measure Vdc between TP1 and GND ground then adjust RV1 to have Vdc at TP3 55 of Vdc at TP1 Repeat same operation with TP2 RV2 and TP4 Typical values of running voltages at TP1 and TP2 for IAE tube XM12 are IAE VTP1 1 2 V VTP2 2 5 V Factory calibration voltages at TP1 TP2 TP3 TP4 can be found in the tube calibration report V TP3 0 55xV TP1 V TP4 0 55 x V TP2 ...

Page 25: ...n not used JP3 shorted Brake time 6 JP4 open Protection enabled JP5 refer to above image Brake disable for heavy use Anode rotation brake is not essential for unit operation and functionality Brake is factory enabled to avoid significant tube temperature increase it s recommended to disable brake JP1 Open for screening or equivalent heavy duty Brake energy can be equivalent to Rotation start avera...

Page 26: ...4044 IFIL GEN ERROR AMPLI RY1 1 5 C P U SRI CLK RESET 2 4 12 3 7 DAC XR2206 SIN VCA TP8 OUTSIN T 1 R16 TP2 V F MASMETER LM331 VTP2 1V 10mA IFIL VREF 8043 FILAMENT SELECTION LD 6 16 8 PULSEK PULSEA 14 On board I f converter is connected to the CPU 01 170 digital mAs integrator for a very high resolution mAs integration 13 5 LED5 R12 92 073 92 079 VSS 1 PA0 2 PA1 3 PA2 4 PA3 5 PA4 6 PA5 7 PA6 8 PA7 ...

Page 27: ...Filament MAMMOMAT Balance SPB7 115 840 01 Page 27 of 62 Siemens AG Troubleshooting Guide Rev 02 10 04 Medical Solutions SIEMENS ...

Page 28: ... of kV range or mAs range mAL and mAH calibration is based on two similar but independent procedures Calibration by internal instrument Before entering any calibration mode it s necessary to select the manual mode and a value of mAs equal to 40 for the 0 3 mm focus and 13 for the 0 1 mm focus In calibration mode the following keys are active Focal spot selection kV selection for whole values filam...

Page 29: ... less than 70 of the expected value in place of the anode current value on the display LLL L will appear It means that exposure ended by means of Back Up Timer Increase If filament current by 0 050 and repeat the exposure If the display indication is still LLL L repeat the above point till you get the indication of mA value and no more the LLL L b Anode current higher than 10 above expected value ...

Page 30: ...n anode current with an exposure Repeat the operation till you get the value of expected mA within 0 5 d Over current and Over voltage protection circuit intervention If Filament current is increased for calibration with respect to previous values Over current or Over voltage alarm could occur Over current Check if LED1 and LED4 switch OFF after pushing x ray pushbutton In such a circumstance incr...

Page 31: ...connect a voltmeter 10 Vdc f s on TP6 GND and TP5 b select SMALL FOCAL SPOT c select 20kV d measure voltage on TP5 TP6 during preparation e connect a voltmeter 10 Vdc f s on TP1 and TP6 GND f adjust RV6 till reaching a value equal to voltage measured at point d increased by 10 Calibration of filament voltage protection Step by step procedure a verify that JP3 bridge is closed b connect a voltmeter...

Page 32: ...ing an exposure of a minimum time consistent with reading time of device used In case of use of a digital voltmeter 1 and consequently 100 130 mAs per large focal spot and 32 mAs per small focal spot DO NOT USE DIGITAL VOLTMETERS IN AUTORANGING MODE AS THEY NEED READING TIMES LONGER THAN 1 In case of use of a memory oscilloscope values suggested are the same for internal mA meter 40 mAs for the 0 ...

Page 33: ...OWN KV0 KV0 KV1 KV2 TP2 C O N T R O L L E R E5 E6 E1 P W M KV FEEDBACK CONTROL VOLTAGE TP5 EXPOSURE TIME TP7 DAC KV3 KV4 KV5 KV6 KV7 KV7 INVON X RAY PB CPU TP6 50khz E High voltage is set by the CPU through an 8 bit opto coupled bus IC6 IC7 IC8 Ground return of opto couplers is directly connected to x ray pushbutton by means of dead man function for maximum continuous safety Releasing x ray pushbu...

Page 34: ... non linearity and filter thickness must be taken into consideration to correct measured values kV check at TP1 TP2 PCB 94 132 H V generator has voltage divider on which kV check can be done by means of normal DVM with 1000 Vdc full scale or oscilloscope with probe able to withstand a minimum of 500 Vdc Connect DVM or oscilloscope to TP1 TP2 GND of PCB 94 132 In the table below kV vs VTP1 are give...

Page 35: ... MANUAL mode since in Automatic mode exposure is always preceded by pre exposure pulse 6 X ray beam is pulsed to avoid grid artifact with grid table to avoid H V interruption use grid less table or remove grid table or press RESET alarm kV buttons valid for the next exposure only or set DIP4 SW1 PCB 01 170 to ON for permanent interruption disable 7 kV values are not affected by replacement of inve...

Page 36: ...High Voltage generator MAMMOMAT Balance SPB7 115 840 01 Page 36 of 62 Siemens AG Troubleshooting Guide Rev 02 10 04 Medical Solutions TP1 TP2 for kV checks on PCB 94 132 RV1 for kV correction ...

Page 37: ...e SPB7 115 840 01 Page 37 of 62 Siemens AG Troubleshooting Guide Rev 02 10 04 Medical Solutions AEC calibration Refer to Start Up manual SPB7 115 815 01 Instructions are also contained in Help Files of DEATA Plus calibration software ...

Page 38: ...istance of 55 cm from Focus for each kV value and for each combination of anode and filter The dose is calculated at the end of an exposure The obtained dose value is shown on screen It can be printed on Film by ID printer and recorded in the unit for statistical purposes The Dose is visualized in mGy with a resolution of 0 01 from 0 to 9 99 mGy and 0 1 from 10 to 99 9 mGy Beyond a 99 9 value HH H...

Page 39: ...ing the desktop for graphics and the menu for functionality of the program At the opening part of main menu is disabled This is because you must first have a configuration loaded in to view and edit data So the only action you can perform is the loading of a particular configuration or the definition of a new one Opening a configuration file To open a configuration file or to create a new one the ...

Page 40: ...tmost list all the necessary files are open and loaded in the program In the rightmost list you will find one configuration per any mammo unit that you previously created by the Deata Plus program So that you don t need to create a new skin dose file for a mammo unit and you cannot delete it The Deata Plus program does this for you with a default set of values at creation and deleting the skin dos...

Page 41: ...Rev 02 10 04 Medical Solutions Saving configuration file All modifications that have been made to configuration file are either immediately saved to file or retained in memory At any point in the program you can save all this modifications regardless partial savings occurred before Press File Save ...

Page 42: ...be placed under the compression paddle Dosimeter reference plane must be located at 550mm from focal spot Characteristics response linearization and unit of measure of reference Dosimeter must be configured before to start calibration Reference dose outside kV range of reference Dosimeter must be set at ZERO Radiation table To view and edit the radiation table for the selected mammo press the Edit...

Page 43: ...o reports the values of Dose Rate and Tube Output Data are presented in a kV versus reference dose grid Any row correspond to a point of the curve The kV steps are fixed so this column is unselectable Data are shown and accepted in µGy or mR depending on the radiobutton selected in the Radiation unit radiogroup and for 1mAs or 50mAs as selected in the corresponding radiogroup while the graph is al...

Page 44: ...nserted by user to obtain effective values to download to mammo The Dosemeters window opens showing instruments found in archive see Dosemeter Data All fields are disabled Just doubleclick the dosemeter used or press the None button The choosen instrument name fills the corresponding edit field You can specify a dosemeter for each target filter combination Once all changes are made you can discard...

Page 45: ... changes or Cancel otherwise Remeber to File Save modifications for permanently store them DOSE FUNCTIONS Dose shown on the LCD Display as well stored in the memory for statistic purposes and print to the ID printer can be enabled disabled in the specific boxes PADDLE POSITION OFFSET Measurement of x ray Source to Skin distance is extremely important for a correct Skin Dose measurement After the a...

Page 46: ...these parameters takes into account the deformations of the compression system as recommended at clause A3 2 1 of the European Protocol of Dosimetry in Mammography Correct Dosimeter operation is guaranteed only if correct configurations as described in the Operator s manual are respected FOCAL SPOT DISTANCE The focal spot distance above the upper plane of the arm can depend on the specific tube in...

Page 47: ...Edit Dosemeter data menu The Dosemeters window opens with edit fields all editable To define a new instrument press the new menu A default dosemeter is inserted in the left list Now you can select it in the list as with an existing one and type the correct informations in corresponding edit fields on the right To modify the response curve for the instruments the default is a plateau curve press th...

Page 48: ...u close it the graphic disappears too Data are presented in a kV versus Correction factor grid Any row corresponds to a point of the curve To insert a new value in the table right click the mouse over an existing one and choice Insert A New kV dialog pops up Type the desired new value and press OK A New Factor dialog pops up Type the desired new value and press OK The table and the graph below are...

Page 49: ...Delete The table and the graph below are updated To modify an existing value either select the row right click the mouse and choice Modify or doubleclick the row Follow the steps as in Insert The input dialogs show the actual value for the editing fields At the end the table and the graph below are updated Finally once all changes are made you can save modifications to file or discard them and ret...

Page 50: ...ion is completely defined you can download it to the mammo unit To download configuration data to mammo unit you must select the Transfer Download configuration to mammo menu A window pops up with edit fields reporting characters outcoming to and incoming from the serial port Press Download pushbutton to start the transfer Once completed a little dialog tells the status of the transfer either good...

Page 51: ...e 51 of 62 Siemens AG Troubleshooting Guide Rev 02 10 04 Medical Solutions Options The only option available is the visualization of the configuration file This file contains text data related to parameters and radiation values constructed by the program ...

Page 52: ...x number on the display will change accordingly to maximum force selected Calibration of Maximum compression force Maximum compression force of 150 N or 200 N is calibrated by means of SW1 DIP7 ON Compression force calibration Insert shifted compression plate 8383197 position a bathroom balance on the table and a soft cushion between plate and balance as alternate method spring balance can be used...

Page 53: ...8 Cable CV0161 connects Motor and microswitches to PCB 03 188 If sensing microswitches are defective motor turns continuously and lock unlock function doesn t work properly For easy static investigation of brake problems DIP1 of SW2 is provided to disable C arm motor SW2 DIP1 ON C arm Brake disabled for service Brake force adjustment Brake force is adjusted increasing decreasing distance between t...

Page 54: ...e care to align it with marks when reassembling it X RAY Beam collimation To verify or align x ray beam grid 8383221 or gridless 8383239 24x30 table is necessary Insert a film in a 24x30 table and insert the table in the slide guide up to align it precisely with the contact on the C arm see figure In this position the potter is 22 mm ahead than its usual position The table is aligned exactly with ...

Page 55: ...eful The two distances A must be the same excluding the clearance of the film in the cassette The two distances B must be the same within 1 mm They must be included between 17 mm and 22 mm If the two distances A are not the same it is necessary to trim the position of the RX tube shifting it to the right if the right distance is shorter than left and vice versa Consider that shifting the tube for ...

Page 56: ... is necessary only if light beam collimator is disassembled To inspect light beam field use again a 24x30 table fully inserted as for normal use with a A3 format paper and an 18x24 film on it insert an 18x24 collimation plate Position 18x24 film as in the next picture to simulate x ray field To correct front back edges of light field adjust mirror inclination by means of screw SCREW ...

Page 57: ...ld alignment MAMMOMAT Balance SPB7 115 840 01 Page 57 of 62 Siemens AG Troubleshooting Guide Rev 02 10 04 Medical Solutions To correct lateral edges of light field adjust lamp holder position by means of screws ...

Page 58: ...made of two gas springs 08896479 08896487 with a jacket 08884293 When gas spring becomes defective MW7 Sensing microswitch opens and specific alarm is generated at control panel To replace gas spring assembly 1 Switch OFF the unit and turning manually flywheel of carriage motor move carriage till to align arrows as shown in the next image 2 remove fixing ring from the shaft RING ...

Page 59: ...840 01 Page 59 of 62 Siemens AG Troubleshooting Guide Rev 02 10 04 Medical Solutions 3 unscrew gas spring from the base plate 4 replace gas spring assembly Reassembling gas spring take care of positioning sensing microswitch shaft without damaging it ...

Page 60: ... X kV tenths 8 k 9 V 10 11 X mAs hundreds 12 X mAs tents 13 X mAs units 14 15 X mAs tenths 16 m 17 A 18 s 19 20 21 X Dimension of focal spot 22 X 23 24 X type of ANODE Mo W 25 X 26 27 X type of FILTER Mo Rh 28 X 29 Y tecnique kV ZERO POINTS s Standard h HIGH CONTRAST l LOW DOSE e EXTENDED 30 31 X G with grid space without grid 32 33 X 0P ZERO POINTS 1P ONE POINT 34 X 35 36 D manual density 37 X 38...

Page 61: ...hooting Guide Rev 02 10 04 Medical Solutions 4800 baud speed 8 bits 1 stop bit no parity ASCII line of 44 characters KV min 20 0 KV max 35 0 KV mAs min 0 1 mAs max 640 0 mAs Dimension of focal spot Manual density 5 Film Screen 1 16 combination The string is transferred once at the end of the exposure ...

Page 62: ...rs in LOG file 20 Better text and images to download last 1300 events from mammo List of Error Codes 22 NOT ACTIVE Calibration of protection circuit 23 Picture changed Anode current calibration 29 To enter mAL current calibration set DIP2 of SW1 Accessing the program 39 Creation of a new Dosemeter file removed change in text and images Radiation table 43 in a kV versus reference dose grid Any row ...

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