Table 2.
% difference between OSEM2D (iteration 1, gold standard in this study) and individual reconstruction algorithms.
| FBP | 3DRP | OSEM2D | OSEM3D-MAP | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % Difference | Ramp | ButterWorth | Hamm | Hann | Parzen | 3DRP | Iter.1 * | Iter.2 | Iter.3 | Iter.4 | Iter.5 | Iter.6 | Iter.7 | Iter.8 | Iter.9 | Iter.10 | β = 0.1 | β = 1.0 | β = 1.5 |
| Tumor | −9.5 | −35.4 | −25.6 | −21.8 | −25.6 | −5.4 | - | 1.5 | 8.7 | 11.4 | 16.7 | 20.4 | 22.8 | 25.7 | 28.6 | 32.4 | 4.4 | 12.8 | −11.2 |
| Organ | |||||||||||||||||||
| Adrenals | 0.0 | −25.9 | −14.0 | −15.9 | 35.7 | −0.8 | - | 13.7 | 26.3 | 35.7 | 43.6 | 51.2 | 56.9 | 60.2 | 71.9 | 152.8 | 4.0 | 14.4 | −7.7 |
| Brain | 21.7 | −19.6 | −16.9 | −20.1 | 71.6 | −10.8 | - | 33.0 | 55.7 | 71.6 | 83.8 | 96.8 | 98.7 | 103.1 | 109.5 | 169.6 | −12.1 | 7.3 | −23.8 |
| Breasts | −2.7 | −31.3 | −17.6 | −20.9 | 35.6 | −5.6 | - | 12.7 | 25.9 | 35.6 | 42.6 | 53.5 | 56.3 | 57.7 | 70.2 | 152.1 | −2.7 | 7.8 | −11.4 |
| Gallbladder wall | 1.9 | −22.2 | −12.1 | −13.2 | 33.3 | 3.7 | - | 14.2 | 25.0 | 33.3 | 40.3 | 49.5 | 52.6 | 57.1 | 67.1 | 150.5 | 4.7 | 16.6 | −9.0 |
| Lower large intestine wall | −3.2 | −32.7 | −20.7 | −20.7 | 31.6 | −3.2 | - | 11.8 | 22.2 | 31.6 | 40.0 | 49.4 | 52.9 | 57.8 | 69.4 | 151.3 | 6.1 | 17.1 | −6.5 |
| Small intestine | 0.0 | −24.7 | −13.0 | −15.8 | 32.7 | 0.0 | - | 13.6 | 23.7 | 32.7 | 40.8 | 48.1 | 53.6 | 58.6 | 68.8 | 151.3 | 4.8 | 15.7 | −7.6 |
| Stomach wall | 4.8 | −10.9 | −6.4 | −7.5 | 19.6 | 9.4 | - | 7.6 | 13.8 | 19.6 | 25.1 | 33.7 | 35.1 | 42.8 | 57.2 | 144.5 | −1.7 | -1.0 | −8.8 |
| Upper lower intestine wall | 0.0 | −24.4 | −14.0 | −14.0 | 31.2 | 2.2 | - | 12.2 | 23.1 | 31.2 | 40.0 | 47.9 | 51.6 | 57.4 | 67.6 | 150.7 | 4.3 | 14.1 | −6.7 |
| Heart wall | −2.4 | −29.3 | −17.7 | −19.1 | 35.4 | −2.4 | - | 12.0 | 26.3 | 35.4 | 42.9 | 53.0 | 55.5 | 57.3 | 70.2 | 151.9 | 0.0 | 8.9 | −11.0 |
| Kidneys | 4.9 | −20.9 | −8.7 | −13.6 | 39.3 | 3.8 | - | 16.8 | 29.4 | 39.3 | 47.8 | 45.2 | 61.3 | 66.7 | 76.7 | 154.7 | 1.7 | 12.0 | −4.5 |
| Liver | 2.1 | −21.3 | −11.0 | −11.8 | 33.8 | 5.8 | - | 14.6 | 25.2 | 33.8 | 40.3 | 50.6 | 52.4 | 57.0 | 64.8 | 149.8 | 6.9 | 20.1 | −9.5 |
| Lungs | −6.4 | −35.2 | −22.6 | −24.1 | 37.6 | −8.2 | - | 11.2 | 28.6 | 37.6 | 45.1 | 55.8 | 57.5 | 58.1 | 71.7 | 152.7 | −7.0 | 1.1 | −14.5 |
| Muscle | 0.0 | −25.8 | −15.4 | −15.4 | 37.2 | 0.0 | - | 15.8 | 27.2 | 37.2 | 44.4 | 54.2 | 57.1 | 61.4 | 72.7 | 153.2 | 5.6 | 13.3 | −5.9 |
| Ovaries | −3.2 | −32.7 | −16.9 | −20.7 | 33.8 | 0.0 | - | 14.5 | 24.7 | 33.8 | 42.0 | 51.2 | 56.2 | 60.9 | 70.7 | 152.2 | 9.0 | 19.7 | −3.2 |
| Pancreas | 0.6 | −24.8 | −13.1 | −14.5 | 33.2 | −0.6 | - | 13.7 | 24.3 | 33.2 | 41.4 | 51.5 | 55.1 | 58.3 | 71.9 | 152.5 | 6.5 | 15.3 | −5.7 |
| Red. Marrow | 0.0 | −26.9 | −14.1 | −17.1 | 38.3 | −2.7 | - | 14.6 | 29.2 | 38.3 | 48.0 | 56.6 | 60.6 | 64.3 | 75.4 | 154.5 | 2.6 | 12.3 | −8.2 |
| Osteogenic | 0.0 | −29.6 | −17.5 | −17.5 | 41.0 | −3.3 | - | 14.9 | 30.1 | 41.0 | 48.8 | 59.1 | 62.2 | 65.2 | 77.2 | 155.1 | 0.0 | 12.1 | −10.2 |
| Skin | 0.0 | −26.7 | −12.5 | −19.4 | 38.1 | 0.0 | - | 16.2 | 30.0 | 38.1 | 45.5 | 55.3 | 61.2 | 64.0 | 74.1 | 154.1 | 5.7 | 11.1 | −6.1 |
| Spleen | −3.1 | −34.5 | −18.2 | −19.0 | 37.2 | −11.4 | - | 15.2 | 26.6 | 37.2 | 47.0 | 60.4 | 63.7 | 64.2 | 80.9 | 156.6 | 15.4 | 25.3 | −0.7 |
| Thymus | −5.1 | −31.9 | −19.2 | −22.2 | 36.7 | −5.1 | - | 11.8 | 28.0 | 36.7 | 44.7 | 54.5 | 57.1 | 58.4 | 71.0 | 152.4 | −2.5 | 4.9 | −13.3 |
| Thyroid | 0.0 | −33.3 | −24.0 | −24.0 | 40.0 | −7.4 | - | 13.3 | 30.3 | 40.0 | 48.6 | 60.0 | 63.4 | 63.4 | 75.6 | 154.8 | −7.4 | 6.9 | −15.4 |
| Urinary bladder | −5.5 | −38.3 | −22.5 | −24.0 | 34.5 | −4.9 | - | 14.4 | 25.0 | 34.5 | 42.3 | 53.0 | 55.5 | 61.2 | 70.3 | 151.9 | 10.7 | 23.2 | −3.6 |
| Uterus | −3.9 | −33.7 | −21.3 | −21.3 | 33.6 | −3.9 | - | 14.3 | 25.2 | 33.6 | 42.4 | 52.5 | 55.6 | 60.4 | 70.0 | 152.0 | 9.2 | 20.7 | −3.8 |
* OSEM2D (iteration 1) reconstruction was regarded as the gold standard. All data were presented for partially corrected data, AC, and AC and SC data. 3DRP: FBP-3DRP.