Table 2 Parameters of image quality obtained for the 22-mm-diameter sphere and the background of the NEMA/IEC NU2 Body Phantom with two gamma cameras, Discovery NM/CT 670 and NM/CT 850
Parameter | |||||
|---|---|---|---|---|---|
Activity concentration in the hot sphere Ac,sphere (22 mm) [MBq/ml] (measured with a meter) | Activity concentration in the hot sphere measured with Q.Metrix ac,sphere (22 mm) [MBq/ml] (measured with Q.Metrix) | Hot contrast QH (%) 22-mm sphere (measured in the image) | Activity concentration in the background Ac,bg [MBq/ml] (measured with a meter) | Activity concentration in the background ac,bg [MBq/ml] (measured with Q.Metrix, mean for 5 ROIs) | |
Discovery NM/CT 670 Department 1 | 0.32 | 0.42 | 71 | 0.04 | 0.07 |
NM/CT 850 Department 2 | 0.32 | 0.38 | 76 | 0.04 | 0.06 |