Siemens MAMMOMAT Inspiration - Page 36

Test 4: Detector Linearity
32 Quality Control Manual
SPB7-330.640.01.01.02
Target/filter combination: W/Rh, tube voltage 28 kV
Exposure
No.
Tube load
(mAs)
Air kerma
(mGy)
Mean pixel
value
SNR
15
210
320
440
563
680
7110
8180
9280
10 360
Performance
Criteria
Passed Failed
Detector offset ________
40 - 60
ll
Linear correlation coefficient ________
0.99
ll