PROTEUS XR/a
GE MEDICAL SYSTEMS
Operator Manual
REV 11
DIRECTION 2259724-100
14-6
TABLE 14-8
ACCURACY READINGS ON CONSOLE READOUTS
Mode : 3 point
Selectable Resultant
mA 26%
ms 26%
mAs 26% increments
Proteus XR/a 32 kW:
17steps(10,12.5,16,20,25,32,40,50,63,80,100,1
25,160,200,250,320,400mA)
1 thru 630ms
39steps
Proteus XR/a 50 kW:
19steps(10,12.5,16,20,25,32,40,50,63,80,100,1
25,160,200,250,320,400,500,630mA)
1 thru 630ms
39steps
Proteus XR/a 65 kW:
20steps(10,12.5,16,20,25,32,40,50,63,80,100,1
25,160,200,250,320,400,500,630,800mA)
1 thru 630ms
39steps
Proteus XR/a 80 kW:
21steps(10,12.5,16,20,25,32,40,50,63,80,100,1
25,160,200,250,320,400,500,630,800,1000mA)
1 thru 630ms
39steps
Non-AEC
AEC
0.5 thru 630mAs
32 steps
0.5 thru 630mAs
32 steps
Auto Exposure Control: AEC
AEC Technique Sensing Device
Sensing area Manual density
correction
Post-display:
Automatic for 5sec
AEC Cassette Ionization
Chamber:up to 2
3 rectangular
cells
5 steps, -2thru
+2, by 26%
increment
mAs, ms and mA
Mode: 2 point
User Selectable
MAs 26% increments
Non-AEC
32 steps
(0.5,0.63,0.8,1.0,1.25,1.6,2.0,2.5,3.2,4.0,5.0,6.3,8.0,10.0,
12.5,16.0,20.0,25.0,32.0,40.0,50.0,63.0,80.0,100.0,125.0,
160.0,200.0,250.0,320.0, 400.0,500.0, 630.0mAs)
AEC
31 steps
(0.5,0.63,0.8,1.0,1.25,1.6,2.0,2.5,3.2,4.0,5.0,6.3,8.0,10.0,
12.5,16.0,20.0,25.0,32.0,40.0,50.0,63.0,80.0,100.0,125.0,
160.0,200.0,250.0,320.0, 400.0,500.0mAs)
Note: Only when the AEC exposure time is more than 5ms, the density target offset can be ensured
less than +/-15%.
Constancy of AIR KERMA
Nominal Shortest Irradiation Time:
80kV, 10ms – without correction
80kV, 7ms – with correction by HV Generator.
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