Volume-averaged CT dose metric (units milligrays)
Expansion
CT Dose Index Volume
Purpose
Key parameter for dose monitoring and protocol optimisation
Clinical Context
CTDIvol is average dose over scanned volume. Typical abdominal CT: 8 to 12 milligrays. Used to calculate DLP and effective dose.
Related Terms
- DLP
- Effective dose
Key Points
- CTDIvol allows dose comparison between scanners and protocols; lower is better (ALARA)