Table 6.
Means of CNRs for 7 cold spheres reconstructed using PAPA, the nested EM-TV and the conventional EM-TV.
| Diameters of Spheres | 14 | 9 | 7 | 6 | 5 | 4 | 3 |
|---|---|---|---|---|---|---|---|
| low-noise phantom | |||||||
| PAPA | 543.563 | 427.444 | 330.512 | 283.982 | 229.776 | 97.887 | 14.505 |
| nested EM-TV | 542.524 | 426.538 | 330.087 | 283.587 | 229.380 | 97.331 | 14.437 |
| EM-TV | 18.721 | 15.195 | 12.599 | 11.744 | 10.610 | 6.785 | 3.993 |
| high-noise phantom | |||||||
| PAPA | 14.378 | 10.106 | 6.577 | 8.570 | 1.543 | 0.424 | 0.764 |
| nested EM-TV | 14.373 | 10.105 | 6.576 | 8.568 | 1.542 | 0.424 | 0.762 |
| EM-TV | 4.929 | 3.544 | 2.484 | 3.128 | 1.310 | 0.724 | 0.839 |