Vatech A9 PHT-30CSS - default chapter; Table of Contents

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Table of Contents
Before you begin .............................................................................................................................. 4
Chapter 1. Hardware Part Service Guide ...................................................................................... 9
1.1. vatech A9(PHT-30CSS) System Block Diagram ............................................................................. 9
1.2. vatech A9 (PHT-30CSS) Board Configuration .............................................................................. 10
1.3. vatech A9(PHT-30CSS) Connection Diagram ............................................................................... 24
1.4. Disassembly of vatech A9(PHT-30CSS) Covers .......................................................................... 32
Chapter 2. CT Image Optimization .............................................................................................. 54
2.1. Geometry information..................................................................................................................... 54
2.2. Equipment default values .............................................................................................................. 55
2.3. CT Sensor Calibration .................................................................................................................... 58
2.4. CT Bad Pixel Verification ................................................................................................................ 71
2.5. CT Geometry Calibration ................................................................................................................ 73
2.6. CT Collimator Alignment ................................................................................................................ 98
2.7. DAP Calibration ............................................................................................................................. 103
2.8. CT Number Calibration ................................................................................................................. 107
Chapter 3. CT Image Evaluation ............................................................................................... 116
3.1. Spatial Resolution(MTF) evaluation ............................................................................................. 116
3.2. Contrast evaluation ........................................................................................................................ 118
3.3. Noise evaluation ............................................................................................................................ 120
3.4. Homogeneity evaluation............................................................................................................... 121
3.5. CT Number Accuracy evaluation ................................................................................................. 122
3.6. High Contrast Resolution evaluation .......................................................................................... 124
3.7. Low Contrast Resolution evaluation ........................................................................................... 126
3.8. Slice Thickness Evaluation .......................................................................................................... 127
3.9. Collimator Alignment Evaluation ................................................................................................. 128
Chapter 4. PANO Image Optimization ...................................................................................... 130
4.1. Geometry information................................................................................................................... 130
4.2. Equipment default values ............................................................................................................ 131
4.3. PANO Sensor Calibration ............................................................................................................. 131
4.4. PANO Collimator Alignment ......................................................................................................... 139
4.5. PANO Collimator Speed Alignment ............................................................................................. 142
4.6. PANO Geometry Calibration ........................................................................................................ 148
4.7. Vertical Laser Beam Alignment ................................................................................................... 153
Chapter 5. PANO Image Evaluation .......................................................................................... 154
5.1. Line Pair Resolution evaluation .................................................................................................. 154
5.2. Low Contrast Resolution evaluation ........................................................................................... 155
5.3. Noise evaluation ............................................................................................................................ 156
5.4. Homogeneity evaluation............................................................................................................... 157
5.5. Collimator Alignment Evaluation ................................................................................................. 158
Chapter 6. CEPH Image Optimization ....................................................................................... 160
6.1. CEPH Sensor Calibration ............................................................................................................. 160
6.2. CEPH Geometry Calibration ........................................................................................................ 173
6.3. CEPH Collimator Alignment ......................................................................................................... 181
6.4. How to use V.I.P.S .......................................................................................................................... 185