GE MEDICAL SYSTEMS CT 9800 QUICK SYSTEM
Rev. 19 Direction 18000
4-ii
TABLE OF CONTENTS (Continued)
SECTION TITLE PAGE
7 X-RAY
(Refer to Direction 18006 X-ray Chapter 4)
8 DETECTOR/DAS/RDCP
(Refer to Direction 18008 RDCS Chapter 4)
9 SYSTEM INTEGRATION ..............................................................................................4-9-1
9-1 X-ray Alignment Check (Refer to Chapter 8 of Direction 18000)..............................4-9-1
9-2 Laser Alignment Check........................................................................................4-9-1
9-3 Final Table-Gantry Alignment ...............................................................................4-9-2
9-4 Alignment Light Visualization ................................................................................4-9-4
9-5 Tomographic Plane Indication and Alignment Check..............................................4-9-4
9-6 Keyboard Layouts................................................................................................4-9-5
10 LOAD-FROM-COLD PROCEDURE (SOFTWARE LOAD) ...............................................4-10-1
11 REGEN........................................................................................................................4-11-1
12 IMAGE PERFORMANCE VERIFICATION......................................................................4-12-1
12-1 General Requirements.........................................................................................4-12-1
12-2 Required Phantoms.............................................................................................4-12-3
12-3 Air Calibration......................................................................................................4-12-3
12-4 Phantom Self Calibration......................................................................................4-12-4
12-5 Phantom Calibation..............................................................................................4-12-6
12-6 Means and Standard Deviations...........................................................................4-12-8
12-7 Beam Hardening..................................................................................................4-12-13
12-8 Data Sheets For Image Performance....................................................................4-12-13
12-9 Quality Assurance................................................................................................4-12-14
- Mean CT Number & Noise (35cm) ......................................................4-12-19
- Mean CT Number & Noise (48cm) ......................................................4-12-21
- High Contrast Resolution....................................................................4-12-23
- Beam Hardening (20 cm)....................................................................4-12-29
- Beam Hardening (35cm).....................................................................4-12-31
13 SLOPE CALIBRATION..................................................................................................4-13-1
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