Barracuda & QABrowser User`s Manual - English - 4.3A
Contents
1. QABrowser icon to be visible 4 The handheld will now search for available Bluetooth devices and show them to you select Current Discovery to limit the list to only show devices in range 5 Select your meter and press OK 6 If prompted enter the passkey for the meter which is 0000 Cable or Holder 1 Connect the cable to the Barracuda and to your handheld or connect the holder to the Barracuda and position the handheld in the holder 2 Turn on the Barracuda 3 If the QABrowser does not automatically launch launch it manually tapping on the QABrowser icon see Bluetooth below If you experience any problems connecting through Bluetooth please see the troubleshooting chapter in the reference manual or visit the RTI website for more information 2012 10 4 3A Barracuda amp QABrowser User s Manual 2 Description of the QABrowser Real time Display and Waveforms 2 2 Real time Display and Waveforms 2 2 1 Using the Real Time Display Fw 1 A list with different type of measurements is Select Type of Measurement shown Note that the number of items in the list is depending on the configuration of your Barracuda system Your list may have other choices than the An list shown here To view items not visible tap the ulsed Fluoroscopy Cine Pulsed exposure arrow or use the scroll button on the handheld Mammography computer For this example select Radiography Select PAA J 2A list with all different2. Change Beam Quality by tapping here Tap here to reset detectors Fara When you tap a unit a list to select unit from is shown Tap the desired unit or tap Cancel to keep the present one The first thing to do before starting to measure is to verify that the Multi Purpose Detector is placed correctly in the X ray field A special function is available to do this Position the MPD under the tube as described in the topic Setting Up the Barracuda 8 The Position Check is usually not necessary for Radiography but often essential for the other modalities in order to get more accurate measurements To skip go to 8 ft Rad All RTO 0 000 fa kV Calibration 0 EF moys ia Ta i a HYL Cancel E AiE iid A 3mm Al Back Reset Wave Appl 5 Tap the kV range selector and a list will appear as shown left Tap Check C to select the MPD position check R1 5 90 155 kV Barracuda amp QABrowser User s Manual 2012 10 4 3A 2 Description of the QABrowser Real time Display and Waveforms Position Check Make an exposure Sensitivity Low Position Check Make an exposure 0 998 OK Sensitivity Low 6 The Position Check screen is now shown Set up the X ray generator Recommended kV is e Radiography use 70 kV e Mammography use 28 kV e CT use 120 kV or any other available kV setting 7 Make an exposure A message will be shown If the detector is incorr
3. Dose TF kV Sensitivity v Low High Delay v 5ms Window Infinite w Normalize to distance SDD 750 mm SDD Norm 500 mm TT IML s n mpp 04030047 2012 10 4 3A Barracuda amp QABrowser User s Manual 2 Description of the QABrowser Real time Display and Waveforms Sensitivity Dose TF Sensitivity kV Delay Window Normalize to distance This is used to set the dose and TF sensitivity for the MPD The sensitivity can be set to Low High and Very High Default value is set according to type of measurement This is used to set the kV sensitivity for the MPD The sensitivity can be set to Low and High Default value is set according to type of measurement selected The delay time defines how long time the Barracuda shall wait before starting to measure kVp after that radiation has been detected The delay can be set to Off 5 ms 25 ms 100 ms 500 ms 1s 2s or Other 0 9999 ms The default value is set according to selected type of measurement This gives the possibility to define a fixed time that Barracuda measures kVp after that the delay time has expired The window can be set to Infinite 5 ms 10 ms 25 ms 100 ms 200 ms or Other 0 9999 ms Default value is always Infinite If Normalize to distance is checked you have the option to normalize the dose reading to any given distance Here you can enter your Source to Detector Distance SDD and a normalizing distance SDD Norm th
4. INGICAtOrS ANG SYMBONS xcs nesses bastageseenceencte enc oaa 27 3 Problems and Solutions cccccscceseeceeeceeeeeeeeeeeeeesneseneceeseeeeseeees 28 3 1 TFOUDISSMOOUNG eneen eA ebatestc 28 NAEK sucretsa case a ieee edema E E E E E 30 Note For a full description of the Barracuda and the QABrowser see the Barracuda Reference Manual The Reference Manual can be found on the Product CD or be downloaded from RTI s website www rti se The manual is available both as PDF and Browser format The Browser HTML format is recommended for easy searching Barracuda amp QABrowser User s Manual 2012 10 4 3A 1 Description of the Barracuda Overview of the Barracuda 1 Description of the Barracuda 1 1 Overview of the Barracuda The main parts of a typical Barracuda system are e The cabinet containing one or more modules e The Multi Purpose Detector called MPD measuring tube voltage exposure time dose and dose rate e A handheld computer with the QABrowser software and or a PC with the oRTlgo software CY o LOJ Multi Purpose Detector Cabinet Handheld computer MPD with modules RTI Handheld Display shown Many different probes and detectors can be used with the Barracuda These probes require at least one EMM electrometer module R100 solid state dose detector for low dose rate measurements R100B solid state dose detector for low or very low dose rate measurements L100B light detector for test of view
5. SDD and a normalizing distance SDD Norm that you want the dose normalized to When this is activated an N symbol will show on the RTD screen 2 3 QABrowser Setup The Barracuda Setup is used to define different parameters that control the function of the QABrowser and Barracuda Open the QABrowser main menu and select Setup All settings are described in the reference manual Select Category Requlations Detector Information System Info System Test Select 2 3 1 Units Setup Units Setup is used to change the preferred unit of measure for dose and dose rate as well as units for temperature and air pressure These are then the default units for all new tests mia Tap the unit you want to change and tap the desired Dose Gy unit in the list that pops up When measuring in the RTD you can temporarily change a unit by tapping the unit text with the stylus Temperature w C Pressure kPa 2012 10 4 3A Barracuda amp QABrowser User s Manual 2 Description of the QABrowser QABrowser Setup 2 3 2 Preferences Setup fied Sleep time defines how for how long time the handheld Sleep time w 15 min computer stays on when it is not used and charging is BY Stay on in Cradle off EY Autoprompt wis Stay on in Cradle defines that it should stay on as soon O Lock unit prefixes ar as it is connected to and powered from the Barracuda BY Analyse waveform Indicate trig w So
6. parameters are shown You can select to measure a single parameter or all at the same time In this example select All Tube voltage Note that the parameters shown here are the pes ones that are available with the current configuration of your system Select A graphical picture of the cabinet s back side showing the modules is displayed on the Select Detector screen You can tap the different modules to view and select the detector you want to use for that module For the MPM only the MPD detector is available You can also select beam quality when applicable and serial number if you have several detectors of the same type Barracuda amp QABrowser User s Manual 2012 10 4 3A 2 Description of the QABrowser Real time Display and Waveforms Shows available Shows available detectors for serial numbers for the selected module selected detector type i Rade All RTD Ae Fod AAT Select etector Select Detector Type Serial number w MPD 02030014 Selected module MPM Selected module EMM and input to use is indicated Pee 3A The next step is to select what you want to Select Detector measure and what detector you want to use The Type actual configuration for your Barracuda is now 7 MPO shown If your Barracuda has a MAS probe you Serial number can now decide if you want to measure mAs or not er eveuute The MPD detector is selected to measure kVp time dose and dose rate If you want to measure mAs tap also
7. state detector like the R100 is however fast enough to detect the frequency even for very low level signals Conditions Compression paddle Settings v Conditions O Compression paddle v Conditions X Compression paddle Scatter factor 1 000 Equiv thickness 0 10 Ba OO For mammography it is sometimes easier to do measurements with the compression paddle in the field The compression paddle will however normally affect the Barracuda kV and dose reading With this check box all the measured values kV dose and HVL will be corrected according to what the user has selected The default setting the first time you start the software is without the compression paddle in the field When selected you will see the settings for Scatter factor and Equivalent thickness The thickness is given in mm Al if you do not know ask the manufacturer or make a comparison with Aluminium filters When this option is active an indicator on the RTD screen indicates that this feature is on Scatter factor If an ion chamber is positioned just below the compression paddle the measured dose will rise because of side scattering from the compression paddle material The effect of this is depending on the ion chambers angular dependence Since the MPD is almost insensitive to this you can put a number here to compare readings from the MPD with readings from an ion chamber See also section Average Glandular Dose AGD MGD When this
8. the EMM electrometer module If you do not want to measure mAs or if you do not have a mAs probe tap Select and continue to step 7 ree 3B When you tap the EMM a list with available mAs Select Detector probes is shown Select the mAs probe you want to Type use w MAS 1 Serial number 3C Tap Select to continue The Barracuda is now set up according to your choices 4 The Real Time Display RTD is now shown and you are ready to measure see figure below The Barracuda is set to the most suitable settings for the selected type of measurement in this case radiography The selected kV range is 45 125 and the beam quality BQ is W 3mmAIl reference beam quality Depending on type of measurement you may have several kV ranges and beam qualities to choose from 2012 10 4 3A Barracuda amp QABrowser User s Manual 12 Description of the QABrowser Real time Display and Waveforms For radiography you have three different kV ranges 35 75 45 125 and 90 155 to select between You will have four displays on this screen if you do not have use a mAs probe and six if you selected to measure mAs The manual for the mAs probe explains how to connect it fe Rad Al RTD WL ie Here measurement indicators are shown 0 000 IS 0 000 Eig 0 000 QHA 3 3 The unit for this parameter 0 Change 0 000 Tit kV range by 0 000 Qi tapping here gt R1 4 45 125 YW 3mm Al 4 7 Back Reset Wave Appl
9. 3A 2 Description of the QABrowser Real time Display and Waveforms parameter displays complementary values may be shown in the figure above exposure time and total filtration Which complementary values that are shown depends on the selected parameter Up to three complementary values can be shown If any of the displayed values is not possible to compensate or cannot be measured with full accuracy the symbol As is displayed at the top of screen If the symbol is displayed you can tap it with the pen to display more information 2 2 2 Waveforms Acquiring and Viewing To view waveforms after the exposure Pe 1 Tap Wave or press the corresponding 7B 74 BR button The waveform screen appears and waveforms are displayed The kV waveform um takes a few seconds to calculate before it is moy displayed 3 13 mAs 9 30 Ri 4 45 125 T 3mm Al i aie a Migve Cite 2 The waveforms are displayed and you can use the pen to move the cursor Corresponding cursor values are shown under the waveforms 3 Tap kVp Dose or mA once to hide show the corresponding waveform 4 You can now make new exposures without returning to the real time display The old waveforms are then erased and the new ones are shown If the waveform recording time is much longer than the exposure time you may only get a part of the waveform since the Barracuda is still capturing the waveform Then you can go back to the R
10. A Barracuda amp QABrowser User s Manual 1 Description of the Barracuda Setting Up the Barracuda 1 4 Setting Up the Barracuda The Barracuda system comes in a customized case Two different cases are available one smaller carrying case CAS 6 with space for a basic Barracuda system The larger case CAS 7 is a transportation case with space for a complete Barracuda system with all its accessories The cases are designed to store typical accessories to the Barracuda like Palmtop probes chargers and cables The figure above shows the smaller case the CAS 6 To set up the Barracuda 1 Pick up the cabinet the MPD and the handheld computer from the case 2 Connect the MPD cable to the connector on the rear on the cabinet see figure below The connector has the text TOP on one side This text should be pointing up when connecting the MPD cable If there is no text use the two marks on one side These marks should be to the right when you are looking at the cabinet from the rear Do not use unnecessary force To disconnect the MPD cable press the two buttons on each side of the connector house and gently remove it MPD Cable with connector 3 Connect the other connector to the MPD The connector has the text TOP on one side The text should be at the same side as the MPD detector area If there is no text let the marks from 2 above be on the side towards the bottom of the MPD Do not use unnecessary force To discon
11. GETTING STARTED with Barracuda amp QABrowser User s Manual English Version 4 3A RTI Electronics AB reserves all rights to make changes in the Barracuda the QABrowser and the information in this document without prior notice RTI Electronics AB assumes no responsibility for any errors or consequential damages that may result from the use or misinterpretation of any information contained in this document Copyright 2006 2012 by RTI Electronics AB All rights reserved Content of this document may not be reproduced for any other purpose than supporting the use of the product without prior permission from RTI Electronics AB Contact Information World Wide RTI Electronics AB Flojelbergsgatan 8 C SE 431 37 MOLNDAL Sweden Phone Int 46 31 7463600 Fax Int 46 31 270573 E mail Sales sales rti se Support support rti se Service service rti se Web site http www rti se Contact Information United States RTI Electronics Inc 33 Jacksonville Road Bldg 1 Towaco NJ 07082 USA Phone 800 222 7537 Toll free Int 1 973 439 0242 Fax Int 1 973 439 0248 E mail Sales sales rtielectronics com Support support rtielectronics com Service service rtielectronics com Web site http www rti se RTI article number 9620503 00 2 Contents Table of Contents 1 Description of the Barracuda cccccsccceeeeeeeeeeeeeeseeesenesenseenesenesenes 3 1 1 Overview Of the Barracuda sno
12. MM In this case it is a MAS 2 probe You can find information about the different parameters in Settings Other Detectors 24 gt Default values for the settings are depending on the selected type of measurement and detector Tap Back to return to the real time display 2012 10 4 3A Barracuda amp QABrowser User s Manual 2 Description of the QABrowser Real time Display and Waveforms 2 2 3 1 Settings Conditions Here general conditions for the measurements are shown Different values can be shown depending on selected measured parameter Conditions TF and Waveform v Conditions These are parameters of the X ray generator which TotalFiltr v Set 30mmal influence the measurements The Barracuda can uaan Z measure these or you can set them yourself Waveform Determine Total Filtr Shows actual total filtration value Estimate means that a new estimation will be performed at next exposure and the values will be displayed on screen Waveform Shows the actual waveform type Determine means that a new analyse of the waveform will be performed for the next exposure The result will be displayed on screen The waveform types supported are DC HF Single Phase 3 Phase 6 Pulse 3 Phase 12 Pulse AMX 4 Pulsed The first four can be automatically determined when Estimate is chosen The selected or set waveform is also shown with a symbol on the Real Time Display see Indicators and
13. Standards and Compliances 9 Start afterdelay 21 Starting the QABrowser 9 Stay on in Cradle 26 Support 28 Symbols 27 Se Temperature 19 TF Sensitivity 23 Threshold 23 24 Timed update mode 21 Total Filtration 18 TP factor 19 Trig Visual indication 26 Trig level time 21 Trig source 21 Troubleshooting 28 U Unit Default 28 Gray 28 Prefixes 28 Rontgen 28 Unit of measure Change 10 Units 25 28 Unknown device 28 Update mode 21 W Warning indicator 27 Waveform Activating 26 Waveform delay 21 Waveform indicator 10 27 Waveform recording time 21 Waveform type 18 Waveforms 15 White screen 28 Window 23 24 Barracuda amp QABrowser User s Manual 32 Notice Notes Barracuda amp QABrowser User s Manual 2012 10 4 3A
14. Symbols 27 AMX 4 The difficulties when measuring tube voltage on a GE AMX 4 is a well known problem Due to high kV ripple at a frequency of 2 kHz it is hard for most non invasive kVp meters to follow the kV waveform correctly DC HF Therefore it is important to select the AMX 4 waveform Single Ph under Settings Conditions 3 Ph 6 Pulse 3 Ph 12 Pulse More about the AMX 4 correction can be found in the Application Note 1 AN 52020 1 from RTI Electronics AB Barracuda amp QABrowser User s Manual 2012 10 4 3A 2 Description of the QABrowser Real time Display and Waveforms Pulsed This waveform type should be used for pulsed fluoroscopy especially when the pulses do not have a good square waveform shape The exposure time must be longer than the selected recording time when using this waveform type Pulsed waveform type is selected under Settings Conditions in the same way as the AMX 4 waveform type Conditions TP factor v Conditions If an ion chamber is used temperature and pressure can be specified to get correct dose measurements The MPD and other semiconductor detectors are virtually not affected by temperature and pressure Temperature 20 0 a Pressure 101 3 kPa TP Factor 1 000 it Tapping Reset will set the T and P back to its default values 101 3 kPa and 20 C resulting in a TP Factor of 1 000 The TP Factor is calculated as follows TP P P x TIT where Pand T
15. TD and tap Wave again when the waveform recording time has passed to get the full waveform 2 2 3 Measurement Settings As mentioned before all settings of the Barracuda are done automatically when you select type of measurement For example when you choose fluoroscopy the detector sensitivity is set to high However there might be situations where the default settings cannot be used and settings must be adjusted Use Settings to adjust the Barracuda when necessary The figure below shows how to access this function 2012 10 4 3A Barracuda amp QABrowser User s Manual 16 Description of the QABrowser Real time Display and Waveforms AA RadAII RTD 0000 IF 0000 00008 O O A 0 0000 0 000 YR1 4 45 125 YW 3mmAl 0 Back Reset Wave Appl Tap this symbol to open the screen with Settings for the Barracuda and the various detectors When you tap the o symbol the Settings screen is shown This can also be accomplished by tapping the J icon on the graffiti area or the Tungsten T3 T5 TX status bar What is shown here is dependent on selected parameter s and used detectors Conditions Shows general conditions for the measurement Different values can be shown depending on selected measured parameter Details about the Condition screens can be seen in Settings Conditions 18 v Conditions Conditions v Conditions TotalFiltr v Estimate 0 0 mml Compression paddle W
16. age of the section it is mentioned not the exact page A Active messages 26 Additional filtration mammo 20 After exposure update mode 21 AMX 4 18 Analyse waveform 26 Atmospheric pressure 19 Auto prompt 26 Auto power off 28 Autoscaling 28 B Barracuda settings 15 21 Battery charging 26 indicator 26 level 26 status 26 warning 26 Beam Correction 27 Beam correction factor 21 Beam quality 10 Blank screen 28 Block diagram 3 Bluetooth 9 28 BNC Banana connector 4 oy pae Cabinet Connectors 4 Indicators 4 CAS 6 8 CAS 7 8 Change Unit of measure 10 Charging Batteries 26 Checking battery status 26 Compliances 9 Compression paddle 20 Equivalent thickness 15 Compression paddle indicator 27 Conditions 15 18 Continuous update mode 21 Current waveform 15 D Default Unit 28 Delay 23 24 Start efter 21 Waveform 21 Demo 9 Detector 10 Detector settings 24 Dose Sensitivity 23 Barracuda amp QABrowser User s Manual N Electrometer module 3 Electrometer waveform 15 EMM 3 EMM 1Ch 2Ch 4 EMM Bias BiasB 4 EMM BiasW 4 Equivalent thickness Compression paddle 15 Error 28 Exclamation indicator 27 me Filtration Additional mammo 20 Free run update mode 21 H Handheld computer 3 Handheld Reset 28 Heel effect 8 Holder MPD 8 HotSync 28 HVL Stand 8 Indicate trig 26 Indicators Battery level 26 Beam Correction 27 Compression paddle 27 Exclamation indicator 27 M
17. are the reference air pressure and absolute air temperature normally P gt 101 3 kPa and T 293 K 20 C T and P are the actual absolute air temperature and pressure in the same units kPa and K Temperature This value is used to calculate the TP factor when ion chambers are used Temperature can be specified in Kelvin degrees Celsius or degrees Fahrenheit Unit is chosen in the QABrowser Setup under Units Pressure This value is used to calculate the TP factor when ion chambers are used Air pressure can be specified in several different units Unit is chosen in the QABrowser Setup under Units Please note that the pressure easily changes by 10 For the same effect from temperature it must change 30 C or 54 F If you have an EMM BiasW module the atmospheric pressure is automatically measured when changing Type of Measurement or starting a Favourite 2012 10 4 3A Barracuda amp QABrowser User s Manual 2 Description of the QABrowser Real time Display and Waveforms Conditions Pulse rate Settings Total Filtr Set 23 mmAl Waveform ow Determine Pulse rate w Set 5 pps Conditions Pulse rate If a pulsed mode is used like pulsed fluoroscopy or pulsed radiography cine the pulse rate can be specified in pulses per second same as Hz This allows you to get a dose pulse reading even if the detector used e g ion chamber is too slow for the Barracuda electrometer to detect the pulses A solid
18. at you want the dose normalized to When this is activated a blue N will show in the top right corner of the RTD screen 2 2 3 4 Settings Other Detectors isis MAS 2 Here general measurement settings for other detectors Sensitivity Low or probes are shown You can also see which module Threshold Hormal the detector is connected to and the detector s serial number Note that different detectors have different options MAS 2 S7 010 Sensitivity Threshold This is used to set the sensitivity for the electrometer module The sensitivity can be set to Low High and Very High The Very High option is only available for the Barracuda EMM BiasW Default value is set according to selected type of measurement and used detector This is used to set the trig level It can be set to Low x Normal 2x 4x and 8x The default value is Normal The setting Low can be used if low signals are measured and a lower trig level is required Barracuda amp QABrowser User s Manual 2012 10 4 3A 2 Description of the QABrowser Real time Display and Waveforms However the risk for false triggering increases when Low is used To avoid false triggering in a noisy environment use one of the higher threshold levels Normalize to Note Only for dose detectors distance lf Normalize to distance is checked you have the option to normalize the dose reading to any given distance Here you can enter your Source to Detector Distance
19. ating when the bias is activated Note that turning on and off the polarizing voltage bias takes approximately 15 seconds Warning Always make sure that the bias is off before connecting detectors EMM BiasB One channel electrometer with built in polarizing voltage supply bias It is the same as EMM Bias but the bias voltage can be output either as a floating input on the LEMO triaxial connector or on the 3 mm banana connector This means that this module supports both ion chambers with triaxial connectors LEMO BNT or TNT connectors as well as BNC Banana connectors EMM BiasW One channel electrometer with built in polarizing voltage supply bias It is the same as EMM BiasB but it can only be used with unipolar positive current detectors like R100B MAS 2B and ion chambers This module supports both ion chambers with triaxial connectors LEMO BNT or TNT connectors as well as BNC Banana connectors Modules can easily be uninstalled or installed by the user at any time allowing easy upgrade or solve technical problems without sending away the complete Barracuda system for service Read more in the topic Exchange of modules in the Reference Manual 1 3 Setting Up the Barracuda for the First Time Before you use your Barracuda for the first time please do the following e Mount the batteries e Attach the external power supply e Charge the system for 16 hours Then continue according to the following section 2012 10 4 3
20. aveform Determine Scatter factor 1 000 Equiv thickness 0 10 Pulses wv Determine Temperature 20 0 2 Pressure 101 3 kPa TP Factor 1 000 Tap Conditions to show the drop down list with other Total Filtr w settings Waveform Barracuda General settings for the Barracuda MPD Specific settings for the MPD detector MAS 2 Specific settings for the external probe As seen all detectors in use will show up in this list Barracuda amp QABrowser User s Manual 2012 10 4 3A 2 Description of the QABrowser Real time Display and Waveforms Barracuda Post delay v 250ms Trig source v Individually Trig level time 50 Update v After exp W f bparis w 2 s 250 Sa s O Start after delay Dose TF Sensitivity v Low kV High Delay v 5ms Window Infinite O Normalize to distance CLL IST s N mep 04030047 Back a ia OV MAS 2 oOo O Sensitivity w Low Threshold Hormal MAS 2 Sh 010 Barracuda 21 Barracuda Shows general settings for the Barracuda You can find information about the different parameters in Settings MPD Shows specific settings for the MPD detector as well as the serial number You can find information about the different parameters in Settings MPD 23 gt MAS 2 Shows specific settings and the serial number for the detector that is connected to the electrometer module E
21. easurement 10 Normalize 27 RTD 10 Warning 27 Waveform indicator 27 K kV Sensitivity 23 kVp waveform 15 S Lock unit prefixes 26 Low battery warning 26 Module 10 MPD 3 Cable 8 Holder 8 MPD position check 10 MPD settings 15 23 MP SEM 4 Multi Purpose Detector 3 N Normalization distance 15 Normalize indicator 27 2012 10 4 3A Index 34 P Palm holder 4 Position check of MPD 10 Post delay 21 Power Management 26 Power supply 26 PPV 10 PPV waveform 15 Practical Peak Voltage 10 Preferences 26 Prefixes Lock 26 Prefixes Unit 28 Pressure Atmospheric 19 Problem report 28 Pulse rate 20 mee QABrowser Setup 25 R Radiation quality 10 Real Time Display 10 Reset Barracuda 10 Bluetooth 28 Handheld 28 Retry 9 R ntgen Unit 28 RTD 10 Indicators 10 S Scatter factor 15 SDD Normalization 15 Select Beam quality 10 Detector 10 Module 10 Unit of measure 10 Sensitivity 24 Dose TF 23 kV 23 Serial number 10 Settings Barracuda 15 21 Beam correction factor 21 Compression paddle 20 Conditions 15 18 Delay 23 24 Detector 24 MPD 15 23 Post delay 21 Pulse rate 20 Sensitivity 23 24 Threshold 23 24 Total Filtration 18 Trig level time 21 Trig source 21 2012 10 4 3A Update mode 21 Waveform recording time 21 Waveform type 18 Window 23 24 Setup Power Management 26 Preferences 26 QABrowser 25 Units 25 Signal Extension Module 4 Sleep time 26 Stand 8
22. ectly aligned the QABrowser will tell you to re position the detector For a small misalignment a correction factor is applied and you are allowed to continue without re positioning the detector This message disappears automatically if the position is OK lf the displayed number is between 0 950 and 1 050 the position is acceptable and a correction factor will be applied to correct the position to 1 000 The correction factor is valid until you perform this check again or until you quit the QABrowser It is recommended to perform the position check after any repositioning of the detector or after change of target filter combination when measuring on a mammography unit You are now ready to make the first exposure Set the generator to 80 kV Make sure that the correct kV range is used in this case R1 4 45 125 When you make the first exposure the Barracuda will evaluate what kind of waveform it is DC HF 3 phase 12p 3 phase 6p or 1 phase and the total filtration This is done for all measurement types but mammography Default values are DC HF and 3 0 mm Al 0 000 G GC 008 Ri 4 45 125 Sram al i Back Reset Woes Ap pl 2012 10 4 3A 8 Make an exposure Every time the Barracuda recognizes an exposure the RTI logo is Superimposed on screen for a short while Barracuda amp QABrowser User s Manual 14 Description of the QABrowser Real time Display and Waveforms ire The Barracuda analyses the waveform and s
23. he last time the signal goes below TLXS ax See example below S 100 Rel signal reat a brrso 20 S trrso 4 25 S IRR10 7 29 S This setting defines when Barracuda shall send measured values to the QABrowser Four different alternatives are available e After exp the QABrowser receives a new value when the exposure terminates e Continuous the Barracuda is continuously sending data as long as radiation is detected Displays in the QABrowser are updated about every four seconds Typically used for Fluoroscopy e Timed the user sets a measurement time The user then starts the measurement and the Barracuda will measure all radiation received during the measurement time without any trig levels When the time has passed a reading will be presented e Free run the Barracuda will continuously measure the radiation without any trig levels Default value is set according to selected type of measurement and this parameter normally never needs to be manually changed unless really low level measurements are to be accomplished See the sections Barracuda amp QABrowser User s Manual 2012 10 4 3A 2 Description of the QABrowser Real time Display and Waveforms Measurement Type Settings and Update Modes in the Reference Manual for more information Waveform The QABrowser is able to show a total of 640 samples rec time The sampling interval is normally 0 5 ms giving a total measurement window of 320 ms B
24. hows the result automatically after the first exposure If the result is incorrect the actual waveform type needs to be set manually see topic Settings 15 for more Determined waveform information DC DC or HF e Rod AI RTD The Barracuda measures the total filtration for each oooi exposure for all measurement types except mammography It is shown automatically after the first exposure Estimated Total Filtr If you want the QABrowser to lock this value and not estimate it again for the following exposures tap Keep You can also enter the total filtration manually under the settings see topic Settings 15 for more information eA 78 740 Up to six values can be shown simultaneously 90 3 M 00 g Measured kVp dose and dose rate values are compensated depending on actual total filtration moy between 1 5 38 mm Al and waveform type 3 13 mAs 9 30 Ri 4 45 125 Tin 3mm Al it wg Move The display looks different depending on the type of parameter you selected in step 3 and if you are using a mAs probe or not In the pictures below you can see how the screen looks if you do not measure mAs and if you select just Tube voltage f Rod Tuber RTD poe Exposure time 50 1 Est Tot Filtr 3 3 Ri 4 45 125 TW 3mm Al l a The single parameter displays are large to allow reading from distance In the single Barracuda amp QABrowser User s Manual 2012 10 4
25. ing boxes and monitor screens MAS 1B MAS 2B or MAS 3 mAs probes for tube current and charge measurements DCT10 or DCT16 CT ionization chambers e Other ionization chambers with BNT TNT or BNC Banana connectors Later in this manual the different probes and detectors are described Below a block diagram of a typical Barracuda system is shown 2012 10 4 3A Barracuda amp QABrowser User s Manual 1 Description of the Barracuda Overview of the Barracuda a Palm Computer E QABrowser i Barracuda vg 1 Oo External probe R100B MAS 2B Personal Computer Ocean aon en ee eee ee a a a ae ON ee ee O o External module Wireless 26 MPD CF Bluetooth Oa or cable connection 1 2 Cabinet and Modules The cabinet is the main part of the Barracuda to which all detectors are connected The cabinet can be configured in different ways depending on the requirements of the user Connectors switches and indicators are located both on the cabinet and on the contained modules This section gives a brief description of the cabinet and the modules A more detailed description of each module is found in Hardware and Specifications in the Reference Manual Charging of batteries External power supply Power switch Indicates when the Indicates when the external Turns the Barracuda on and internal batteries are power supply is connected off charging The Power switch is used t
26. ionality can be changed under Settings 15 JL Waveform indication This symbol indicates that the waveform was set or determined as 3 Phase 6 Pulse Tube voltage readings are affected by this The waveform functionality can be changed under Settings 15 fur Waveform indication This symbol indicates that the waveform was set or determined as 3 Phase 12 Pulse Tube voltage readings are affected by this The waveform functionality can be changed under Settings 15 Waveform indication This symbol indicates that the waveform was set as AMX 4 from General Electric See Settings Conditions 18 for more information Tube voltage readings are affected by this The set waveform can be changed under Seitings 15 f This symbol indicates that one or more measured value is not displayed with maximum accuracy This indicator is for example shown when the Barracuda is unable to apply a correction compensation to a measured value Tap the symbol to get a detailed description of the problem The indicators may appear in different situations and in different places in the QABrowser but they always have the same meaning and functionality 2012 10 4 3A Barracuda amp QABrowser User s Manual 28 Problems and Solutions 3 Problems and Solutions 3 1 Troubleshooting Before contacting your distributor or RTI Electronics please check the following tips A Check the RTI web page for updates http www rti se B Ru
27. is activated a red compression paddle indicator will show in the top right corner of the RTD screen kmal Equiv thickness The given equivalent compression paddle thickness is used to Barracuda amp QABrowser User s Manual 2012 10 4 3A 2 Description of the QABrowser Real time Display and Waveforms increase the accuracy of dose measurements when dose is measured below the compression paddle It is given in equivalent thickness of aluminium This feature can also be used if you have additional filtration in the beam Add the equivalent thickness of aluminium Conditions Beam Correction Ett v Conditions Sometimes you may want to make comparable measurements with known mechanical setup For instance if you want to emulate ion chamber measurements in a particular scattering situation Then you can set a Beam Correction factor to get that reading In this case the ion chamber measures an extra 25 from side and back scatter Using this factor makes the readings to be the same It is of course important that the mechanical setup in these cases are the same When this function is activated a red horisontal indicator will show in the top right corner of the RTD screen M Beam Correction 1 25 2 2 3 2 Settings Barracuda Here general measurement settings for the Barracuda are shown Settings Barracuda Post delay v 250ms Trig source v Individually Trig level time 50 Update v After e
28. n through the checklist below The cabinet does not start Check 1 That the right power supply is used 2 That the green LED lights up on the left side 3 When powering on the cabinet does the front logo light up 4 When powering on the cabinet without the MPD attached does the front logo light up 5 That the batteries are correctly mounted 6 Try running the RTI updater to restore the firmware The cabinet batteries does not last very long Check 1 Have you updated the Barracuda Cabinet software to version 1 4A or newer 2 Have you tried with a different set of batteries With 2600 mAh batteries a typical system with one EMM and one MPD should typically run for 6 5 hours My Barracuda cabinet flashes its logo indicator slowly and does not measure Your system is in Bootloader mode Please run RTI Updater to correct this The MPD does not work Check 1 That the cable between the MPM and MPD is fully inserted 2 If using the long MPD cable test also with the short 2 m 3 Check that the motor moves properly or can beep QABrowser Setup System Test The MPD filter seem to have stuck 1 Start the QABrowser and run the filter test QABrowser Setup System Test 2 Hold the MPD in you right hand by the cable edge 3 When the motor is trying to move tap the MPD s left long edge in the palm of your left hand until it comes free The electrometer does not give a reading Check 1 That the correc
29. nect the MPD cable press the two buttons on each side of the connector house and gently remove it Barracuda amp QABrowser User s Manual 2012 10 4 3A 1 Description of the Barracuda 9g Setting Up the Barracuda 4 Place the MPD under the tube or mount the holder and HVL stand for positioning of the MPD in the X ray field See the figure to the left The stand allows you to position the MPD or the R100 dose detector and HVL filters in any angle including upside down Use the light field or other help to position the MPD in the X ray field The MPD detector is not sensitive for different field sizes as long as the entire sensitive detector area is irradiated but try to keep the field size down to minimize scattering It is also recommended to position the MPD in such a way that the detector area is orientated perpendicular to the anode cathode axis to avoid the heel effect Recommended field size is 20x40 mm 5 Optionally you may connect the power supply to the cabinet Now everything is set up with the hardware 1 5 Standards and Compliances For standards and compliances see the reference manual 2 Description of the QABrowser 2 1 Starting the QABrowser Wireless through Bluetooth 1 If you are using the Barracuda insert the Barracuda Serial Bluetooth Module 2 Turn on the meter 3 Launch the QABrowser by tapping on the QABrowser icon Please note that All needs to be selected at the top of the screen for the
30. o turn the Barracuda on and off Barracuda has several ways of saving power when it is inactive but must be powered off manually since there is no auto power off function The indicator for Charging of batteries is lit when charging is enabled and chargeable batteries are used Only use recommended batteries and never charge non chargeable batteries This may damage your Barracuda cabinet Barracuda amp QABrowser User s Manual 2012 10 4 3A 1 Description of the Barracuda Cabinet and Modules The indicator for External power supply is lit when the Barracuda is powered from an external power source Use only the power supply that comes with the Barracuda Support for Palm Holder for old Palm models Serial interface USB interface Power supply input 12 V Connects to a handheld Connects to a PC Use only approved power computer or PC supply The Serial interface is an RS 232 interface and is used to connect to the handheld computer or toa PC Here a Bluetooth adapter the RS232 PC interface serial cable between PC and Barracuda or the Palm interface serial cable between handheld and Barracuda may be connected The USB interface is used to connect the Barracuda to a PC running the QA software ORTIgo Note that the USB connector cannot be used when connecting to a handheld computer The external power supply 12 V is connected to the Power connector Use only the power supply recommended by the manufacturer Country specific pl
31. own device Normally it will show the serial number if you wait a while How do change from Gray to Rontgen units You can set this for all tests pull down menu Setup Units see Units Setup 25 It is also possible to set mixed units for a test and save as Favourites All measurements settings QABrowser settings set values and selected units will be saved with the Favourite How do I stop the units from autoscaling its prefixes There is a preference setting for this pull down menu Setup Preferences see Preferences Setup 26 Can set the time before the Handheld powers off automatically Yes there is a preference setting for this pull down menu Setup Preferences see Preferences Setup 26 How do I reset the Handheld computer There is a small reset hole on the back of the Handheld computer use the stylus pointer to reset Please see the Barracuda Reference Manual for more Troubleshooting tips C Contact your local representative or RTI Electronics AB The more information you supply will help us to get a quick solution to your problem Examples of useful information is screen dump pictures exact error message texts log files etc You may also use the auto report function described in the section How To Report a Problem in the Barracuda Reference Manual 2012 10 4 3A Barracuda amp QABrowser User s Manual 30 Index Index Note Page references in this Index points to the first p
32. ren a a 3 1 2 Cabinel and MOGUICS sic sccsscscssaacuatecsmavateeta a eiiie 4 1 3 Setting Up the Barracuda for the First Time cccccceceseeeeeeeeeeeeeeeeeeeeeeaes 7 1 4 Setting Up the Barracuda cccccscccccsssseeeceeeeeeceeeseeecseeseeeesseeeeessenseseneas 8 1 5 Standards and Compliances ccccccccccssececcseeeceseeceeeeceeseeeecsaeeesaeeeeses 9 2 Description of the QABrowsSetl cccccceccssseeseeeseeceeeeeeseeeeenesenesenesens 9 2 1 Starting the QABrowser sicd 2 c0dsch tk coacdav cus edeeebodechoealcdhencias id easel 9 2 2 Real time Display and Waveforms c cccccecseeeeeeeeeeeeeeseeeeeeeeeneeeesaaaeeees 10 2 2 1 Using the Real Time Display cccccsccccsseeceeeeceecesceecceeeceueessueessueesseeeeees 10 2 2 2 Waveforms Acquiring ANd Viewing ccccsseeecceceseeeeeeeeaeeeeeeeseseeeeeesaaaeeeeseaas 15 2 2 3 Measurement Settings ccccccccccccccesececeeeeceeeeeceeesueceeseeeeeseeeeeeseaeeeesaeeeeeaaeeeees 15 22 001 SOUINGS CONGIIONS ec sce caress steP EA a e EEE AEE 18 222 SeCWIMNGS Baracuda sei a a E A 21 223 37 SOLUS A MPD arnor N AT 23 2234 Settings Other Detectors cscri a ae eee aa 24 29 QABIOWSer SCUD naaa ea E ante snaelacebeneateae 25 2 3 1 WTS CUNO pied EE TE A EEA A eee tat A TA emma als 25 2 3 2 Prelcrences SOU r a a e aid a a eamante teoateesdaeruaeee ss 26 24 Battery amp POWer Status lt 0 cick a eee ee eee 26 25
33. se Module The Multi Purpose Detector is connected to this module via a 2 m cable or an optional 6 m cable MP SEM This module is used for special measurements The module has a signal input that can be used to acquire any kind of external signal The module also has a Trig In and a Trig Out connector This makes it possible to start a measurement from an external signal rather than from the measured signals You can also supply a trig signal from the Barracuda to other systems Five different types of EMM modules electrometer modules are available EMM 1Ch One channel electrometer without bias voltage This module is necessary for all standard measurement with solid state dose detectors light detector and mAs probes EMM 2Ch Two channel electrometer without bias voltage It is the same as Barracuda amp QABrowser User s Manual 2012 10 4 3A 1 Description of the Barracuda Cabinet and Modules EMM 1Ch but it has two channels that can be used independent of each other allowing you to measure with two external detectors simultaneously EMM Bias One channel electrometer with built in polarizing voltage supply bias and floating input This module is required when using ionization chambers with LEMO connectors BNT or TNT adapters are available The bias can be turned off allowing use of solid state dose detectors light detectors and mAs probes The bias voltage is user selectable between 300 V and 300 V A yellow LED is indic
34. t input connector is used and connected 2 That probe cables look healthy 3 If using an ion chamber check that the bias indicator is lit The electrometer gives numerous trig indications If you get the trig indicator play symbol when there is no signal Barracuda amp QABrowser User s Manual 2012 10 4 3A 3 Problems and Solutions Troubleshootin 1 Press reset 2 If it comes over and over you may need to increase the trig level by raising the threshold see topic Settings 15 The electrometer or MPD gives too low dose rate If you get to low dose rate readings or too short irradiation times for short exposures 1 Check that you are measuring with a good geometry where the incoming radiation is perpendicular to the detector surface See Specifications MPD for details The QABrowser does not show the Bluetooth Discovery Results screen Try the following 1 Exit the QABrowser 2 Do a hardware reset of your Tungsten using the reset hole on the back of the Palmtop 3 Restart the QABrowser get a blank white screen when running the QABrowser Click the Back button leftmost to get out and then re enter the test again Bluetooth unable to reconnect using Retry Tap Exit and restart the Barracuda and then re start the QABrowser again Bluetooth only shows Unknown device when trying to connect Depending on Palm model it may take a little while for the serial number to appear the Barracuda will appear as Unkn
35. ugs are available In emergencies other power supplies may be used with voltages between 4 and 20 V The cabinet is protected from negative voltages however supplying voltages outside 20 V may damage the Barracuda On the rear of the cabinet all connectors for detectors and probes are found 2012 10 4 3A Barracuda amp QABrowser User s Manual 1 Description of the Barracuda Cabinet and Modules MP SEM EMM Signal Expansion Module for MPD Electrometer Module Combined with MPM MPM Multi Purpose Module Connects to MPD EMM LED indicator Indicates if the module is selected or active MPM LED indicator Indicates if the module is selected or active EMM Input Channel 2 b EMM Input Channel 1 a MPM Connector Connects to MPD via the MPD Cable MP SEM Trig input Waveform out and Trig out MPD high speed To MPD From MPD electrometer input The figure above shows a cabinet with three modules and three free slots dummy modules The number and type of modules are depending on the configuration of your Barracuda system An orange LED indicator is located on all modules The LED indicator is used for different purposes e Indicates that the module is selected e Used to guide the user to connect a probe or detector to the right module The function of the LED is described more in detail in the topic Hardware and Specifications The following module types are presently available MPM Multi Purpo
36. und Yisualy AUto prompt is for the built in applications in Activemessages On multi parameter mode It defines how long time the result from one exposure is shown before the cursor moves on to the next position Lock unit prefixes means that the prefix of a unit is fixed and not auto ranging Analyse waveform means that the Barracuda automatically analyses and determines the type of waveform Indicate trig lets you select how a trig event will be presented to you Can be all combinations of sound and graphics Active messages lets you enable disable the use of active messages the QABrowser automatically changes range or filter when the signal or tube voltage is too low high 2 4 Battery amp Power Status The battery status for the Barracuda and handheld are displayed together on a informative display as shown below You access this screen on the menu tap the icon by selecting Info Power Status Rod Alli RTD Battery Level 0 000 fre For both the Barracuda and the Palm you Sm can monitor the charge level by the fill of the Power Status battery symbol Barracuda _ A little power supply indicator to the right a 5 tells you when the Barracuda are powered On by an external power supply Palm Enable charging at startup Please see the Reference manual for a description of the various settings Barracuda amp QABrowser User s Manual 2012 10 4 3A 2 Description of the QABro
37. wser Indicators and Symbols 2 5 Indicators and Symbols These indicators are shown in the upper rightmost corner of the real time display RTD and application screens These are either attention messages settings affecting your measurement readings or settings you have made Especially when using favourites they will give you a quicker overview A surrounding square indicates the relative position of the three first as they may be shown simultaneously This symbol indicates that the function Beam Correction is active The set beam correction factor can be changed under Settings 15 N This symbol indicates that the function normalize to distance is active The set distances can be changed under Settings 157 For mammography This symbol indicates that a compression paddle is lumen used in the beam The doses measured by the MPD detector can then be compensated to simulate the scatter effect that an ion chamber shows when a compression paddle is positioned directly above the detector The equivalent thickness and scatter factor can be changed under Settings 15 gt tel Waveform indication This symbol indicates that the waveform was set or determined as DC HF Tube voltage readings are affected by this The waveform functionality can be changed under Settings 157 Waveform indication This symbol indicates that the waveform was set or determined as single phase Tube voltage readings are affected by this The waveform funct
38. xp W f rec ime v 2 s 250 Sa s O Start after delay Post Delay The post delay time defines how long time the Barracuda shall wait and look for more after detecting what can be considered to be the end of the exposure Default value is 250 ms The post delay is necessary when measuring on units with some kind of pre pulse or for pulsed exposures The post delay can be set to Off 25 ms 250 ms 1 s or Other 0 9999 ms The default value is set according to selected type of measurement see section Measurement Type Settings in the Reference Manual Trig source This setting makes it possible to define the trig source for the electrometer module Available settings are 2012 10 4 3A Barracuda amp QABrowser User s Manual 2 Description of the QABrowser Real time Display and Waveforms Trig level time Update e Individually each detector starts to measure individually when it detects a signal e MPD the measurement of all parameters all modules start when the MPD starts to measure Default value is always MPD when it is used This is the recommended trig source Here you can set the level used for irradiation time measurements Trig level time TL is normally set to 50 of the peak waveform SPEAK but can be set between 10 and 90 The irradiation time is then calculated as the end time minus the start time e The start time is the first time the signal goes above TLxS ax e The end time is t
39. y increasing the sampling interval a sampling window up to 40 seconds or even more can however be selected This is very handy when longer exposure times are used and the waveforms need to be viewed The available range is however higher for some slower detectors typically ion chambers and also when Very high sensitivity is chosen for EMM BiasW See section Update Modes in the Reference Manual for more information The default value is set according to selected type of measurement Start after delay When this is selected the waveform recoding will start after the set delay This can be useful if you want to study a phenomenon that occurs after the normal waveform recording time When this is selected the electrometer waveform will not show simultaneously and you will get a warning that the irradiation time measurement is inaccurate The reason for this is that the Barracuda needs the waveform from start to be able to accurately calculate the irradiation time This is a temporary setting and it will be turned off when you exit the RTD 2 2 3 3 Settings MPD Here general measurement settings for the MPD are shown You can find information about the different parameters below Dose TF kV Sensitivity v Low High Delay v 5ms Window Infinite O Normalize to distance CLL IST s N mep 04030047 Back d If Normalize to distance is checked another section is shown See description below
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