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. Author manuscript; available in PMC: 2020 Apr 29.
Published in final edited form as: Biomed Phys Eng Express. 2019 Mar 12;5(3):037001. doi: 10.1088/2057-1976/ab0926

Table 2.

Quantification index(TV(R2)/TV(R1)) for the higher noise level (2 × 106 counts).

Algorithm 10 iterations 100 iterations 500 iterations 1000 iterations 10 000 iterations
ML-EM 1.2274 0.8287 0.5530 0.5323 0.4738
Green (β = 0.1) 2.2609 8.1766 9.6805 9.8039 9.8522
Proposed (β = 0.01) 0.9899 0.9500 0.8508 0.8780 0.8433