Fig. 4From: Quantitative SPECT (QSPECT) at high count rates with contemporary SPECT/CT systemsObserved wide-spectrum count rate vs. projection number for System A (Symbia T6) with only the detector 1 (a), only the detector 2 (b), or both detectors activated (c), and System B with both detectors activated (d; Discovery 670; visually similar to NM/CT 870 DR) during SPECT acquisitions of the NEMA phantom. The dashed lines correspond to the maximum quantifiable activityBack to article page