Fig. 2
From: Optimization of SPECT/CT imaging protocols for quantitative and qualitative 99mTc SPECT
Effect of the reconstruction setup on the signal-to-noise ratio (SNR) of the examined spheres. a SNR of the clinical acquisition protocol (60 projections, 20 s/projection) for different reconstruction setups (SCF1.10 in combination with four different iteration sets). b SNR for a fixed set of iterations (2i/10s) demonstrating effects by the acquisition protocol (clinical or NEMA) and SCF (1.10 or 0.41). HSRC was plotted against sphere diameter normalized to FWHM at 100 mm with LEHR collimator (FWHM = 7.4 mm) and sphere volume