Table 1 Background calibration factor (Bg. cal), coefficient of variation (COV), total activity deviation (ΔAtot), background activity concentration (Ac,bg) measured with the activity meter and background activity concentration (ac,bg)—average of the 5 ROIs measured in the image with Q.Metrix, for two SPECT/CT acquisitions of the cylindrical uniform phantom in two nuclear medicine departments
Gamma camera, medical center | Coefficient | ||||
|---|---|---|---|---|---|
Background calibration factor Bg. cal | Coefficient of variation COV (%) | Total activity deviation ΔAtot (%) | Activity concentration in the background Ac,bg (MBq/ml) (measured with an activity meter) | Activity concentration in the background ac,bg (MBq/ml) (measured in the image with Q.Metrix, average of the 5 ROIs) | |
Discovery 670 Department 1 | 1.192 | 4 | − 1.02 | 0.052 | 0.062 |
NM/CT 850 Department 2 | 1.135 | 10 | − 0.45 | 0.052 | 0.059 |