Table 3.
Survey results and DRLs: hybrid CT of SPECT/CT
| Target site, purpose of use | CTDIvol, mGy | DLP, mGy cm | ||||
|---|---|---|---|---|---|---|
| 50th percentile | 75th percentile | 2020 DRLs | 50th percentile | 75th percentile | 2020 DRLs | |
| Whole body, AC + Dx | 2.9 | 5.03 | 5.0 | 180 | 384.1 | 380 |
| Brain, AC + Dx | 10.6 | 22.60 | 23.0 | 262 | 419.2 | 410 |
| Head and neck, AC + Dx | 3.3 | 5.73 | 5.8 | 133 | 205.1 | 210 |
| Chest, AC + Dx | 2.6 | 4.06 | 4.1 | 90 | 164.8 | 170 |
| Heart, AC + Dx | 3.2 | 4.50 | 4.5 | 89 | 180.0 | 180 |
| Abdomen, AC + Dx | 3.0 | 5.02 | 5.0 | 89 | 206.8 | 210 |
| Extremities, AC + Dx | 3.2 | 4.69 | 4.6 | 159 | 237.2 | 230 |
| Brain, AC only | 7.3 | 12.86 | 13.0 | 140 | 350.9 | 330 |
| Heart, AC only | 1.6 | 4.04 | 4.1 | 45 | 84.1 | 85 |