User Manual

Table Of Contents
157
2900H EN 20071108 Advanced operation (Key-operator mode)
DRYSTAR 5500/5503 REFERENCE MANUAL
9 Record the respective aim (average) values as the ‘Operating levels’ on Charts
2a and 2b (‘Drystar 5500/5503 Daily Density Control Chart’). Refer to ‘Charts
for mammography QC (optional)’ on page 247.
The calculated ‘Operating levels’ should be as follows:
10 These charts will be used for the daily quality test. For more information, refer
to ‘Performing the daily QC test for mammography application (DT 2 Mammo)
(optional)’ on page 161.
Operating Level
Value (Macbeth units)
(according to NEMA standards XR 23-2006)
Base + Fog 0.22 ± 0.03
Low density 0.52 ± 0.07
Mid density 1.35 ± 0.15
High density 2.35 ± 0.15