Vatech A9, Техническое руководство

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Vatech A9 (PHT-30CSS)
Technical manual
VDH-TeM-098
85 / 214
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5. CT Collimator Alignment
5.1. CT Collimator Alignment
1. Run the C:\VCaptureSW\Acquisition\CBCT\WidePANO\VACAP.exe file.
2. Send [SPM_ARCT], [SPM_CSON], [SPM_FIPM_0001], [SPM_FISS_0001], [SPM_FISM_0001],
[SPM_COLM_0001] commands to the command window to set the CT sensor and collimator.
3. Set 94 kvp, 7.0 mA in VACAP and click the CTB button to acquire the image.
4. Use the Collimator control command to find a value that satisfies the standard below.
Command Function
[SPM_CCST_03450] PANO collimator position movement control
[SPM_CAST_09200] CEPH collimator position movement control
[SPM_CFST_06350] CT collimator position movement control
5. Run EzEval.exe file
(Path : C:\VCaptureSW\Utility\EzEval_Phantom)
6. Choose EzEvaluation for the tap menu on the top left, and choose collimator viewer from the tap
menu on the top right.
7. Set the Threshold value concerning the following standard, and check if 0010.raw satisfies the
collimator alignment cut standard.
The collimator alignment standard for each FOV is as follows.
※
Collimator alignment standard value
Collimator Min pixels Max pixels
Threshold 95%
Left 1 2
Right 1 2
Threshold 75% Upper 1 10
Lower 1 10
8. When 1~2 pixels are visible on the left, subtract the collimator parameter as much as 0.35
collimator value.
Ex. [SPM_CFST_8235] → [SPM_CFST_8200]
9. When 1~2 pixels are visible on the right side, Add the collimator parameter as much as 0.35
collimator value.
Ex. [SPM_CFST_8235] → [SPM_CFST_8270]