Table 2.
Mean, min, and max of the ratio of adult organ doses calculated from the NCI and ImPACT methods for major organs in three examinations.
| Exam type | Total cases (n) | Organs | Organ dose ratio (NCI/ImPACT)
|
Extreme cases
|
|||||
|---|---|---|---|---|---|---|---|---|---|
| Median | Min | Max | > 2-fold | % | > 5-fold | % | |||
|
|
|
|
|||||||
| Head | 1123 | Brain | 0.84 | 0.52 | 2.31 | 5 | 0.4 | 0 | 0.0 |
| Thyroid | 0.47 | 0.18 | 13.84 | 7 | 0.6 | 3 | 0.3 | ||
|
|
|
|
|||||||
| Chest | 404 | Lung | 0.94 | 0.73 | 7.27 | 56 | 13.9 | 4 | 1.0 |
| Heart | 1.06 | 0.78 | 13.14 | 113 | 28.0 | 57 | 14.1 | ||
| Breast | 0.86 | 0.69 | 4.01 | 21 | 5.2 | 1 | 0.2 | ||
|
|
|
|
|||||||
| Abdomen | 516 | Kidney | 1.03 | 0.68 | 7.95 | 31 | 6.0 | 9 | 1.7 |
| Liver | 0.61 | 0.44 | 9.55 | 5 | 1.0 | 3 | 0.6 | ||