Table 1.
Notification values recommended by the AAPM Working Group on Standardization of CT Nomenclature and Protocols [3]
| CT scan region (of each individual scan in an examination) |
CTDIvol notification value (mGy) |
|---|---|
| Adult head | 80 |
| Adult torso | 50 |
| Pediatric head | |
| < 2 years old | 50 |
| 2–5 years old | 60 |
| Pediatric Torso | |
| < 10 years old (16-cm phantom) | 25 |
| < 10 years old (32-cm phantom) | 10 |
| Brain perfusion | |
| (examination that repeatedly scans the same anatomic level to measure the flow of contrast media through the anatomy) | 600 |
| Cardiac | |
| Retrospectively gated (spiral) | 150 |
| Prospectively gated (sequential) | 50 |