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Noise level of a large VOI (⌀, 3.0 cm) placed in the liver and the SNR with all lesion sizes averaged are presenting for TOF-OSEM (3 iterations, 16 subsets, post-filter 5.0 mm and PSF) and BSREM with β = 750 (including TOF and PSF). Reference values measured in a healthy liver
| Noise (14.137 ml) | SNR (lesion size averaged) | |||
|---|---|---|---|---|
| Time (min)a | OSEM | β750 | OSEM | β750 |
| 2.5 | 0.443 | 0.228 | 20.256 | 41.710 |
| 5.0 | 0.318 | 0.156 | 15.088 | 29.092 |
| 10 | 0.217 | 0.109 | 10.243 | 19.448 |
aTotal of nine range of times per bed position
