TABLE I.
Average differences between organ dose simulated by Monte Carlo (gold standard) and predicted by the patient matching method for chest scans. The differences are normalized by the CTDIvol of the exam.
| a = 0.25 (%) | a = 0.5 (%) | a = 0.75 (%) | a = 1 (%) | |
|---|---|---|---|---|
| Kidneys | 5.1 | 4.1 | 5.5 | 5.8 |
| Liver | 10.6 | 9.9 | 9.4 | 9.6 |
| Gall bladder | 8.2 | 7.8 | 7.9 | 8.4 |
| Spleen | 17.0 | 15.8 | 14.5 | 14.1 |
| Stomach | 14.9 | 13.8 | 12.5 | 12.4 |
| Brain | 0.4 | 0.7 | 1.0 | 1.1 |
| Bladder | 0.0 | 0.0 | 0.0 | 0.0 |
| Large intestine | 2.5 | 2.4 | 2.5 | 2.6 |
| Pancreas | 8.9 | 9.6 | 10.4 | 10.8 |
| Prostate | 0.0 | 0.0 | 0.0 | 0.0 |
| Adrenals | 10.4 | 10.1 | 10.1 | 10.3 |
| Eyes | 0.3 | 0.5 | 0.7 | 0.8 |
| Testes | 0.0 | 0.0 | 0.0 | 0.0 |
| Small intestine | 2.2 | 2.3 | 2.6 | 2.8 |
| Ovaries | 0.0 | 0.0 | 0.0 | 0.0 |
| Uterus | 0.0 | 0.0 | 0.0 | 0.0 |
| Vagina | 0.0 | 0.0 | 0.0 | 0.0 |
| Breasts | 6.7 | 10.1 | 14.4 | 16.9 |
| Heart | 8.8 | 8.5 | 9.4 | 12.3 |
| Lungs | 9.3 | 12.3 | 16.0 | 18.6 |
| Thyroid | 23.2 | 33.2 | 37.2 | 39.2 |
| Thymus | 13.5 | 14.4 | 17.1 | 21.6 |
| Esophagus | 15.7 | 21.7 | 26.0 | 27.3 |
| Bones | 4.3 | 4.3 | 5.1 | 5.9 |
| Marrow | 3.8 | 4.4 | 4.5 | 4.5 |
| Skin | 1.8 | 1.8 | 1.8 | 1.8 |