Table 3. Organ doses for selected regions of the body by age (KiCT-PACS data set).
| Mean organ dose in mGy (standard deviation) | |||||
| Age in years | |||||
| Body region | Organ | < 0.4 | 0.4 ≤ 2.5 | 2.6 ≤ 7.5 | 7.6 ≤ 12.5 |
|
Head (n = 16 518) |
Bone marrow | 10.8 (7.4) | 11 (7.47) | 11.43 (6.95) | 7.2 (3.98) |
| Brain | 34.72 (23.8) | 28.13 (19.21) | 32.78 (19.28) | 37.12 (19.68) | |
| Lens of eye | 36 (23.6) | 30.26 (18.86) | 36.78 (20.15) | 41.24 (20.08) | |
| Thyroid gland | 7.04 (5.45) | 3.37 (2.65) | 3.18 (2.09) | 3.32 (2.36) | |
|
Chest (n = 5032) |
Bone marrow | 1.62 (3.5) | 1.73 (2.46) | 1.53 (2.29) | 2.11 (2.69) |
| Thyroid gland | 3.77 (7.31) | 4.95 (6.76) | 7.19 (9.61) | 6.06 (7.06) | |
| Lung | 4.53 (9.33) | 5.38 (7.49) | 7.22 (11.11) | 8.4 (10.98) | |
| Breast* | 3.9 (7.38) | 4.82 (7.1) | 6.38 (11.53) | 7.1 (8.03) | |
| Heart wall | 4.7 (9.69) | 5.44 (7.6) | 7.53 (11.88) | 8.72 (11.52) | |
|
Abdomen (n = 1457) |
Bone marrow | 2.67 (3.22) | 1.87 (2.29) | 2.25 (2.36) | 3.32 (3.1) |
| Breast* | 1.28 (1.15) | 2.08 (2.21) | 8.33 (8.64) | 1.28 (1.15) | |
| Large intestine | 13.36 (20.19) | 6.06 (7.17) | 10.9 (11.42) | 13.2 (13.27) | |
| Ovaries* | 6.63 (11.82) | 5.52 (6.48) | 8.82 (9.69) | 7.61 (7.55) | |
| Testicles* | 1.46 (2.05) | 0.62 (0.86) | 0.82 (0.91) | 0.64 (0.62) | |
*Calculated only for males or females respectively
KiCT, s tudy on the r isk of cancer incidence in children after exposure to ionizing radiation from computed tomography; PACS, picture archiving and communication system