Fig. 1
From: Quantitative SPECT (QSPECT) at high count rates with contemporary SPECT/CT systems
The NEMA phantom (a) containing a 500-mL (#1) and a 250-mL (#2) bags, large sphere (#3), small sphere (#4) and the cold-water-filled cylinder (#5). Maximum intensity projection (b) and selected transaxial fusion slices from System A with both detectors (c; 4.93 GBq total activity) and only detector 1 activated (d; 5.12 GBq total activity), respectively. The scale is expressed in terms of counts per pixel