Konica Minolta CS-7 - AEC Performance Checks (Stability and Reproducibility

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4.2 MP-Tables
Chapter 4
3.13 AEC Performance Checks
Table MP-10 (CNR)
Date: Inspectors Name:
Mammography X-ray unit S/N:
Stability and Reproducibility
28kVp, 4 cm acrylic
Exp Count
mAs mR
Exp #1
Exp #2
Exp #3
Exp #4
Mean
Standard Deviation (SD) Pass/Fail
Coeff of variation (%)
*1
Criteria
≤5% ≤5%
P Pass
*1Coeff of variation(%)=(SD/mean)×100 F Fail
Thickness Tracking
Thickness
(cm)
kVp Target Filter
mAs
CNR
Measured
CNR
(relative to
4cm PMMA)
Acceptable
level
Pass/Fail
2 >100%
4 100%
6 >75%
P Pass
F Fail
Comments: