Vatech Green 21 PCT-90LH, User Manual

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4. Installation Procedures
Green21 (Model: PCT-90LH) Installation Manual 47
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4.10.1 How to Modify
1. Copy the Collimator.ini file and back up to C:\VCaptureSW\SettingFiles folder.
2. Remove Carbon case and chair.
When performing the collimator correction, wait for 10 minutes
after performing one CT sequence shot and then take another
shot.
3. Collimator Speed Compensation (synchronized matching operation for movement
between sensor and collimator during shooting)
1) Run C:\VCaptureSW\Util\CollimatorAlign\CollimatorAlign.exe file.
2) Check the collimator invasion area (more than 10 pixels) at 0010.raw
Projection with the threshold value set at 80%.
3) In case of more than 10 pixels, backup the corresponding PROJ folder. (ex:
PROJ_4%cut)
4) Run C:\VCaptureSW\Exe\VCaptureSW.exe file and select FOV 21x19 then
shoot (No Reconfiguration Required).
When performing the collimator correction, wait for 10 minutes
after performing one CT sequence shot and then take another
shot.
5) After running C:\VCaptureSW\Util\EzEval_Phantom\EzEval.exe, select the
PROJ path as shown below and check the projection image.
Left side Right side
0100.raw X axis: 61 pixels X axis: 164 pixels
5300.raw X axis: 50 pixels X axis: 167 pixels
Calculation
61-50 = +11
(By: 3Pixel or less)
164-167 = -3
(By: 3Pixel or less)
Original Speed
Check setting value
Input: [SPM_CLV?]
Response: +6
Input: [SPM_CLV?]
Response: 0
Calculation of speed
correction value
Calculation (+11) + Existing
setting value (+6) = 17
As the criteria passes, the input X
Input of speed
correction value
[SPM_CLVC_0017] [SPM_CRVC_XXXX]
Acceptable figure
0100.raw-5300.raw = 3Pixel or less
(Do not need to enter the correction value if pass the criteria)