Gain calibrations reduce the variations in a clinical setting produced by the variety of x-ray machines, tables, and other components of the install.
NOTE: USE THE KVP/MA SETTINGS OBTAINED FROM VIVA WHEN SHOOTING IN SMART DR
Gain calibrations reduce the variations in a clinical setting produced by the variety of x-ray machines, tables, and other components of the install.
NOTE: USE THE KVP/MA SETTINGS OBTAINED FROM VIVA WHEN SHOOTING IN SMART DR
Depending on the type of panel you have, your Viva gain calibration will be different. Please choose whether you have an Auto Exposure Detection (AED) panel or if you have a generator integrated panel that uses a UIO Box.
2. Ensure the following
1. Launch the ViVA application
2. Set the mode dropdown to VTRIG_1000ms_2pF
3. Set the X-Ray Generator Technique:
4. Click “Acquire Image”
5. Check the “Hardware-Handshaking” box
6. Click “Start Acquisition”
7. Acquire a flat image to check technique
ALWAYS CENTER and ALIGN the panel prior to calibrating, then put the table top BACK ON before getting “Img Stats” ROI numbers in step 8!
8. Click “Img Stats”
9. Average of Pixel Values in ROI should be between 10000 – 15000:
10. Close the “Img Stats” window
11. Click Acquisition > Gain Calibration
12. Click OK under Calibration Settings for 8 images
13. The detector will begin acquiring a series of offset images (8 total). The progress window
14. Once the offset images have been acquired and stored to the panel, the progress
window will display flat-field 0, started, press hand-switch… and then scroll “waiting”
repeatedly. Acquire gain image 1 of 8
15. Once the progress window displays received gain image 1 of 8, flat-field 1, press handswitch
– acquire gain image 2.
16. Repeat step 15 until all 8 gain images have been acquired. Once the files have been
updated on the detector, the progress window will display “successfully finished
calibration”. Close the Gain Calibration window.
17. There is no need to perform an additional gain calibration in the SmartDR software.
Gain calibrations reduce the variations in a clinical setting produced by the variety of x-ray machines, tables, and other components of the install.
Smart DR utilizes 2 programs to complete the gain calibration. The first is Viva, which allows us to adjust to the technique to obtain the correct settings. Viva also gives us the opportunity to check our plate for any inconsistencies. After a 3-shot calibration has been performed in Viva, continue to the Smart DR software to complete another 8-shot gain calibration.
NOTE: USE THE KVP/MA SETTINGS OBTAINED FROM VIVA WHEN SHOOTING IN SMART DR
3. Set the X-ray collimation to wide open and use the appropriate technique to start your calibration (techniques will vary based on x-ray machine)
6. With your technique set appropriately, fire an x-ray.
8. Click the Image Stats button to estimate your final gain calibration number. Box 11, Average of Pixel Values in ROI should fall between the following numbers for your install:
Older versions of the Varian 1700 panel may calibrate different. Please contact tech support if you have a different panel/computer than listed above.
800-819-5538
If your average value is off, please adjust appropriately and repeat steps 5 & 6.
10. The gain calibration will do a quick offset.Take an X-ray when the status box displays “X-ray exposure in progress… Frame count:1.”
NOTE: This message indicates that the plate is ready for exposure. You will you will activate the x-ray machine by pressing the Sound foot switch.
11. After the shot, the status box will read “Click the ‘Finish’ button or initiate next exposure(#2). Wait until the Finish button grays out and fire again. Repeat this until you have reached 4 shots.
Before calibrating your plate in SmartDR, please ensure that the following has been completed:
2. IGNORE THE INSTRUCTIONS on the screen. Follow the steps below
4. Your panel will take several moments to prepare. The Instructions section will provide updates
5. Take your first shot when the Instructions show you the kvp, mas, and SID to fire. IGNORE the kVp, mAs, and SID settings. Use the previous settings from your Viva calibration (i.e. for a 4343, kVp start around 54 kVp and 2.5 mAs)
6. Your Instructions status will change after your shot to “Performing Calculations, please stand by…” When your system is ready for the next shot, the insructions will read “1. Set kVp to: 70, etc….” and your Current Status will read what shot number you are on. Take your next shot.
7. After 8 shots, the SmartDR status will read Calibration Successful
10. RESTART SYSTEM AFTER CALIBRATION. If you do not restart your system, you will not be able to take an x-ray in the acquisition screen.
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