Descriptions for MSAD and CTDI variants
| Dose Index | Description |
|---|---|
| MSAD | Average dose over 1 scan interval in the center region of multiple scans |
| CTDI | Integrated dose profile for a single section, normalized to the beam width; equivalent to MSAD and measured by using multiple TLDs or 1 ionization chamber |
| CTDI100 | Radiation dose index for 100 mm along the length of an entire pencil ionization chamber |
| CTDIw | Weighted average of the CTDI100 measured at the periphery and at the center of phantoms |
| CTDIvol | CTDIw divided by pitch |
| DLP | CTDIvol multiplied by the length of the scan |
Note:—TLD indicates thermoluminescent dosimeter; MSAD, multiple scan average dose.