DLP
Also written as: DLP — Dose Length Product
Dose Length Product; a measure of total radiation exposure that accounts for both dose intensity and scan length in CT imaging.
Full Definition
Dose Length Product (DLP) represents the total radiation dose delivered during a CT examination by multiplying the CT Dose Index (CTDI) by the scan length. Expressed in mGy·cm, DLP provides a more comprehensive assessment of patient radiation exposure than CTDI alone, as it accounts for the anatomical coverage of the scan. In oncologic imaging, DLP is crucial for dose optimization and cumulative exposure tracking, particularly for patients requiring frequent surveillance imaging. DLP values are used to estimate effective dose and compare radiation burden across different imaging protocols.
Usage
Usage note: Express in mGy·cm units and include in all CT dose reports.
In Context
- "The DLP for the chest-abdomen-pelvis staging scan was 850 mGy·cm." — Radiation dose documentation
- "Optimize scan parameters to achieve DLP values below institutional reference levels." — Protocol development