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Table 4 Scan time reduction factor and CR gain for different numbers of iterations (Vision with 440 × 440 matrix size) when compared to the reference values of mCT

From: From a PMT-based to a SiPM-based PET system: a study to define matched acquisition/reconstruction parameters and NEMA performance of the Biograph Vision 450

   Contrast recovery gain (%)
Number of iterations Mean reduction factor 10-mm sphere 13-mm sphere 17-mm sphere 22-mm sphere 28-mm sphere 37-mm sphere
3 1.79 + 41% + 72% + 71% + 40% + 14% + 9%
4 1.34 + 53% + 81% + 76% + 43% + 20% + 14%
5 0.95 + 61% + 85% + 79% + 44% + 25% + 17%