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. Author manuscript; available in PMC: 2024 Jun 8.
Published in final edited form as: Biomed Phys Eng Express. 2023 Dec 5;10(1):10.1088/2057-1976/ad0f40. doi: 10.1088/2057-1976/ad0f40

Table 2.

Comparison between MLEM with analytic modelling, spatial invariant PSF and SV-PSF, 400 iterations.

2 × 105 counts, Mean ± SD MLEM invariant PSF SV-PSF
CNR 4.5 mm 2.8 ± 0.4 2.8 ± 0.8 3.7 ± 1.2
5.5 mm 2.2 ±0.3 2.7 ± 0.6 3.2 ± 0.6
CRC 4.5 mm 31.2 ± 5.1 34.0 ± 10.8 47.6 ± 15.0
5.5 mm 16.8 ± 2.7 23 ±5.1 27.5 ± 6.5
2 × 106 counts, Mean ± SD MLEM invariant PSF SV-PSF
CNR 4.5 mm 2.8 ± 0.5 2.9 ± 1.0 3.7 ± 1.3
5.5 mm 2.2 ± 0.3 2.8 ± 0.5 3.2 ± 0.6
CRC 4.5 mm 31.5 ± 5.7 35.5 ± 12.7 47.6 ± 17.3
5.5 mm 17.5 ± 2.7 24.3 ± 5.0 28.4 ±6.4