Table 3 Noise magnitude and average noise power spectrum (NPS) spatial frequency obtained for images reconstructed with FBP, HIR, MBIR, and DLR
Parameter | Anatomical structure | DLR | MBIR | HIR | FBP |
|---|---|---|---|---|---|
Noise magnitude (HU) | Aorta | 9.70 (1.14) | 27.78 (4.61) | 17.06 (2.64) | 53.36 (8.13) |
Liver | 10.32 (0.74) | 27.11 (3.32) | 18.12 (1.54) | 49.02 (9.39) | |
Psoas muscle | 10.25 (1.16) | 23.86 (2.86) | 16.80 (2.06) | 42.71 (6.32) | |
Average NPS spatial frequency (mm−1) | Aorta | 0.27 (0.03) | 0.29 (0.03) | 0.24 (0.02) | 0.33 (0.02) |
Liver | 0.19 (0.02) | 0.22 (0.02) | 0.18 (0.01) | 0.29 (0.01) | |
Psoas muscle | 0.25 (0.04) | 0.28 (0.04) | 0.24 (0.03) | 0.33 (0.03) |