Mean Evaluation Metrics for Both SPECT Datasets with RR Without PVC, After IY-PVC, and After DL-PVC over All 500 Test Activity Distributions
| SPECT reconstruction | PVC method | SSIM | NRMSE (%) | VAA (%) | AD (%) |
|---|---|---|---|---|---|
| RR_nf | None | 0.899 (0.019) | 9.98 (1.32) | 13.57 (4.14) | 0.28 (2.00) |
| IY-PVC | 0.945 (0.009) | 8.07 (2.33) | 17.05 (4.03) | 4.62 (6.16) | |
| DL-PVC | 0.971 (0.007) | 5.74 (0.89) | 43.30 (8.79) | 0.28 (2.00) | |
| RR_n | None | 0.890 (0.022) | 10.44 (1.40) | 12.10 (3.18) | 0.33 (2.06) |
| IY-PVC | 0.936 (0.013) | 8.58 (1.21) | 15.06 (3.27) | 6.36 (4.36) | |
| DL-PVC | 0.947 (0.015) | 7.75 (1.33) | 35.79 (10.06) | 0.33 (2.06) |
SSIM = structural similarity index measure; NRMSE = normalized root-mean-square error; VAA = voxel activity accuracy; AD = activity deviation.
Data in parentheses are SDs. Note that activity deviation is same without PVC and after DL-PVC because of activity conservation approach.