GE CT-9800

GE MEDICAL SYSTEMS CT 9800 QUICK SYSTEM
Rev. 14 Direction 18000
4-12-7
Don’t forget to center each phantom to within 0.12mm of isocenter using the Calibration Program (under
Utilities).
* NOTE: One should use 140 MA for HiLight systems instead of 170 MA indicated for the XENON
systems.
** NOTE: For large cals, scans are not required at 1.5 and 3 mm. apertures. Data from the 5 mm.
scan is used to calculate the vectors for 1.5 and 3 mm. apertures.
TABLE 4-12-2
PHANTOM CALIBRATION
KV MA PHANTOM APERTURE (mm)
80
80
80
80
120
120
120
120
140
140
140
140
80
80
120
120
140
140
80
80
80
80
120
120
120
120
140
140
140
140
300
300
300
300
200
200
200
200
170
170
170
170
300
300
200
200
170
170
300
300
300
300
200
200
200
200
170*
170*
170*
170*
35 cm
35 cm
35 cm
35 cm
35 cm
35 cm
35 cm
35 cm
35 cm
35 cm
35 cm
35 cm
48 cm
48 cm
48 cm
48 cm
48 cm
48 cm
20 cm
20 cm
20 cm
20 cm
20 cm
20 cm
20 cm
20 cm
20 cm
20 cm
20 cm
20 cm
10
5
3
1.5
10
5
3
1.5
10
5
3
1.5
10
5**
10
5**
10
5**
10
5
3
1.5
10
5
3
1.5
10
5
3
1.5