Table 5.
Means of CNRs for 7 hot 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 | 1915.768 | 1590.557 | 1574.134 | 1451.297 | 1280.732 | 1043.835 | 611.271 |
| nested EM-TV | 1912.141 | 1587.496 | 1571.388 | 1448.454 | 1277.969 | 1041.962 | 610.677 |
| EM-TV | 65.801 | 55.159 | 56.717 | 51.872 | 47.284 | 40.451 | 28.124 |
| high-noise phantom | |||||||
| PAPA | 52.171 | 41.019 | 37.525 | 31.919 | 28.247 | 13.939 | 5.448 |
| nested EM-TV | 52.149 | 41.002 | 37.510 | 31.905 | 28.234 | 13.932 | 5.445 |
| EM-TV | 17.007 | 13.116 | 11.885 | 9.815 | 8.389 | 4.237 | 2.232 |