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. Author manuscript; available in PMC: 2022 Apr 1.
Published in final edited form as: Med Phys. 2021 Mar 4;48(4):1846–1858. doi: 10.1002/mp.14756

Table 2.

CNR improvement factor, KCNR, in small and large Catphan phantoms.

Phantom size GSS used? 1D ASG 2D ASG
R21 R8P3 R12P2 R16P2
Small No 1.05 ± 0.09 1.09 ± 0.11 1.31 ± 0.06 1.21 ± 0.15
Yes N/A 1.10 ± 0.12 1.31 ± 0.06 1.21 ± 0.15
Large No 1.49 ± 0.42 1.87 ± 0.37 2.01 ± 0.38 1.95 ± 0.50
Yes N/A 1.86 ± 0.37 2.01 ± 0.40 2.00 ± 0.50