9600 Service Manual - gmecorp-usa.com

2 Image System Calibration
BEAM ALIGNMENT
OVERVIEW
The beam alignment procedure has been designed to align imaging chain components
with the image intensifier. The following stages have been determined to be the best
procedure for performing beam alignment in the field.
1. Equipment Setup - optimizes equipment setup and positioning to minimize C-Arm
flexure and the effects of the earth’s magnetic field on the image intensifier.
2. CCD Camera Cooler Operation - Verify the operation of this circuit.
3. Calibrate Rotation Indicator - calibrates the camera rotation before starting
alignment.
4. Monitor/camera Alignment Pattern - acquires the Monitor/Camera Alignment
Pattern.
5. Adjust Monitors - Describes how to reset size, centering and linearity of the
Workstation monitors using the Monitor/Camera Alignment Pattern.
6. Adjust Camera Focus - optimizes the camera focus before alignment.
7. Adjust Camera Decentration -adjusts the camera’s mechanical position with respect
to the output port of the image intensifier.
8. Adjust Camera Electronic Centering - adjusts the camera’s electronic center with
respect to the output port of the image intensifier (SW1 & SW2).
9. Collimator Mechanical Center - the secondary collimator is aligned with respect to
the variable collimator.
10. Image Intensifier Electronic Centering - the image intensifier electronic center is
located.
11. Variable Collimator Centering - the entire collimator assembly is aligned with the
electronic center of the image intensifier.
12. Collimator Iris Calibration - the collimator iris field sizes are calibrated.
13. Beam Alignment Verification - films are taken in the NORM, MAG1, MAG2 and
5cm 2 positions to verify the beam alignment has been successful.