TABLE 4.
Quantitative evaluations of the reconstructed NAC SPECT images of the 150 testing patient studies.
| Testing Groups | NMSE (×10−2) | NMAE (×10−2) | SSIM | PSNR | p-valuea |
|---|---|---|---|---|---|
| Sparse-View Baseline | 2.51 ± 1.58 | 12.73 ± 2.77 | 0.9948 ± 0.0020 | 38.81 ± 2.86 | – |
| CUSIP | 2.54 ± 1.13 | 13.31 ± 2.19 | 0.9938 ± 0.0015 | 38.51 ± 2.02 | – |
| CUSIP-DuRDN | 1.64 ± 0.77 | 10.41 ± 2.10 | 0.9958 ± 0.0014 | 40.49 ± 2.28 | < 0.001* |
| Direct Img2Img | 1.53 ± 1.05 | 9.77 ± 2.69 | 0.9965 ± 0.0014 | 41.00 ± 1.82 | 0.154 |
| Direct Sino2Sino | 1.33 ± 0.81 | 9.17 ± 2.25 | 0.9967 ± 0.0013 | 41.54 ± 2.23 | 0.003* |
| DuDoSS (proposed) | 1.07 ± 0.67 | 8.29 ± 1.84 | 0.9974 ± 0.0010 | 42.45 ± 2.55 | < 0.001* |
a
Two-tailed paired t-test of NMSE between the current and previous group in the table.
*
Refers to significant difference with a significance level of 0.05.