Table 3.
Recovery coefficients (RCs) for the whole-parenchyma kidney phantoms, three different target-to-background ratios, and two different SPECT reconstruction iteration numbers
| Whole-parenchyma phantom name | Recovery coefficients [%] 36 iterations |
Recovery coefficients [%] 72 iterations |
||||
|---|---|---|---|---|---|---|
| Target-to-background ratio | Target-to-background ratio | |||||
| Infinity | 10:1 | 5:1 | Infinity | 10:1 | 5:1 | |
| Pat7L | 75.3 | 74.5 | 78.5 | 75.2 | 75.5 | 80.3 |
| Pat7R | 76.0 | 75.3 | 80.5 | 76.9 | 76.6 | 82.3 |
| Pat8L | 77.3 | 75.9 | 78.3 | 77.5 | 77.6 | 80.4 |
| Pat8R | 76.8 | 76.6 | 80.0 | 76.9 | 78.1 | 80.1 |
| Pat9L | 77.9 | 74.8 | 79.4 | 78.9 | 76.0 | 80.8 |
| Pat9R | 74.8 | 75.4 | 78.7 | 74.5 | 76.4 | 79.8 |
| Pat10L | 78.5 | 78.5 | 82.3 | 78.3 | 79.4 | 83.9 |
| Pat10R | 77.1 | 76.0 | 79.5 | 77.8 | 76.9 | 81.0 |
| Pat11L | 77.1 | 78.3 | 80.0 | 77.5 | 79.2 | 81.5 |
| Pat11R | 77.7 | 77.9 | 79.8 | 78.1 | 78.9 | 80.9 |
| AVG ± SD | 76.9 ± 1.2 | 76.3 ± 1.5 | 79.7 ± 1.2 | 77.1 ± 1.4 | 77.5 ± 1.4 | 81.1 ± 1.2 |
| Ellipsoid | 85.4 | 82.8 | 89.0 | 85.4 | 83.3 | 89.6 |
The AVG ± SD row denotes the average plus/minus one standard deviation of all whole-parenchyma phantoms RCs. The last line contains the RCs of the ellipsoidal phantom for comparison. Values were obtained for LEHR collimation and the radionuclide 99mTc