Table 2.
Average effective dose and bone marrow doses for radiography exams, by age group and examination type
| Exam type | Effective dose (microSv) |
Bone marrow dose (microGy) |
||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall |
<1 y |
1-5 y |
6-10 y |
11-15 y |
16-21 y |
Overall |
<1 y |
1-5 y |
6-10 y |
11-15 y |
16-21 y |
|||||||||||||
| Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | |||||||||||||
| Abdomen | 29.5 | (27.3) | 12.2 | (7.4) | 19.6 | (11.4) | 25.7 | (15.1) | 49.7 | (32.6) | 74.4 | (43.1) | 7.4 | (7.6) | 3.1 | (1.9) | 4.5 | (2.6) | 5.8 | (3.5) | 13.2 | (8.9) | 21.1 | (12.1) |
| Ankle | 0.2 | (0.1) | 0.1 | (0.0) | 0.2 | (0.1) | 0.2 | (0.2) | 0.2 | (0.1) | 0.3 | (0.1) | 0.1 | (0.2) | 0.2 | (0.1) | 0.3 | (0.1) | 0.2 | (0.3) | 0.1 | (0.0) | 0.0 | (0.0) |
| Chest lateral, chest PA | 13.6 | (6.7) | 20.6 | (2.8) | 15.4 | (6.8) | 7.3 | (0.6) | 8.7 | (0.3) | 8.7 | (0.5) | 7.0 | (3.4) | 11.0 | (1.3) | 7.2 | (3.8) | 4.1 | (0.6) | 5.6 | (0.3) | 5.9 | (0.3) |
| Chest PA | 6.0 | (3.4) | 8.4 | (1.6) | 7.5 | (3.0) | 2.1 | (0.5) | 2.4 | (0.7) | 2.2 | (0.6) | 3.0 | (1.0) | 3.8 | (0.6) | 2.8 | (0.9) | 1.7 | (0.5) | 2.4 | (0.7) | 2.5 | (0.7) |
| Clavicle | 9.2 | (1.4) | 8.5 | (1.0) | 8.4 | (1.3) | 7.6 | (0.9) | 10.0 | (0.5) | 10.7 | (0.4) | 4.1 | (1.0) | 3.7 | (0.0) | 3.1 | (0.4) | 3.3 | (0.5) | 4.8 | (0.3) | 5.2 | (0.3) |
| C-Spine | 13.4 | (3.6) | 11.5 | (2.2) | 15.9 | (2.8) | 15.3 | (3.6) | 10.3 | (1.6) | 11.1 | (1.7) | 16.8 | (7.0) | 20.6 | (2.1) | 24.0 | (2.7) | 18.8 | (5.7) | 9.4 | (1.4) | 9.7 | (1.4) |
| Elbow | 0.3 | (0.1) | 0.2 | (0.1) | 0.2 | (0.1) | 0.3 | (0.1) | 0.4 | (0.1) | 0.5 | (0.1) | 0.2 | (0.1) | 0.1 | (0.1) | 0.2 | (0.1) | 0.3 | (0.1) | 0.2 | (0.1) | 0.1 | (0.0) |
| Femur | 7.3 | (7.8) | 1.5 | (0.7) | 2.7 | (2.3) | 8.4 | (4.0) | 16.4 | (7.4) | 21.1 | (8.0) | 2.3 | (2.4) | 0.4 | (0.1) | 0.7 | (0.6) | 2.5 | (0.7) | 5.5 | (1.7) | 7.0 | (2.0) |
| Full spine | 91.5 | (49.6) | 36.7 | (7.1) | 47.7 | (8.8) | 83.9 | (29.7) | 121.1 | (41.6) | 130.7 | (45.1) | 42.6 | (22.6) | 19.6 | (3.7) | 23.0 | (3.9) | 36.3 | (13.0) | 55.8 | (19.2) | 61.4 | (21.2) |
| Knees | 1.0 | (0.8) | 0.2 | (0.1) | 0.5 | (0.3) | 0.9 | (1.6) | 1.2 | (0.5) | 1.4 | (0.5) | 0.7 | (1.1) | 0.2 | (0.1) | 0.7 | (0.5) | 1.4 | (2.4) | 0.7 | (0.5) | 0.2 | (0.1) |
| L-Spine | 44.9 | (21.7) | 8.9 | (0.1) | 13.6 | (3.9) | 26.2 | (8.7) | 45.9 | (17.8) | 56.3 | (19.8) | 21.9 | (11.0) | 4.4 | (0.0) | 5.5 | (1.2) | 11.3 | (4.1) | 22.5 | (8.8) | 28.0 | (9.8) |
| Pelvis | 18.8 | (12.4) | 7.4 | (4.7) | 11.8 | (5.1) | 16.8 | (7.2) | 24.7 | (11.7) | 32.4 | (14.0) | 7.4 | (6.0) | 2.2 | (1.4) | 3.2 | (1.3) | 5.4 | (2.4) | 11.0 | (5.2) | 15.1 | (6.4) |
| Shoulder | 23.0 | (10.0) | 3.7 | (1.6) | 9.8 | (4.8) | 20.4 | (5.5) | 27.0 | (7.4) | 29.9 | (7.0) | 9.3 | (4.0) | 2.3 | (0.9) | 4.1 | (1.7) | 8.0 | (2.2) | 10.8 | (3.0) | 12.1 | (2.8) |
| Skull lateral | 8.0 | (3.1) | 13.4 | (2.3) | 9.1 | (2.5) | 7.7 | (1.6) | 6.3 | (1.7) | 5.1 | (1.7) | 14.9 | (8.8) | 31.3 | (5.2) | 20.1 | (6.0) | 13.1 | (3.1) | 8.6 | (2.2) | 6.5 | (1.6) |
| Skull PA | 7.0 | (2.9) | 11.6 | (2.6) | 9.3 | (2.6) | 6.6 | (1.5) | 5.1 | (1.0) | 4.6 | (0.9) | 15.7 | (8.0) | 29.4 | (5.6) | 22.4 | (6.5) | 14.5 | (3.6) | 10.0 | (2.1) | 9.0 | (2.0) |
| T-Spine | 48.4 | (13.5) | 13.2 | (1.5) | 18.3 | (3.4) | 31.7 | (5.6) | 49.8 | (7.7) | 60.5 | (9.4) | 28.8 | (9.1) | 7.9 | (0.9) | 9.3 | (1.3) | 16.7 | (3.4) | 29.7 | (5.2) | 37.4 | (5.7) |
| Whole body | 15.8 | (0.6) | 15.8 | (0.6) | . | . | . | . | . | . | . | . | 9.6 | (1.1) | 9.6 | (1.1) | . | . | . | . | . | . | . | . |
| Wrist | 0.1 | (0.0) | 0.1 | (0.0) | 0.1 | (0.0) | 0.1 | (0.0) | 0.1 | (0.0) | 0.1 | (0.0) | 0.04 | (0.0) | 0.1 | (0.1) | 0.1 | (0.0) | 0.1 | (0.0) | 0.03 | (0.0) | 0.02 | (0.0) |