Diagnostic reference level
Citation, DOI & article data
Vajuhudeen, Z., Murphy, A. Diagnostic reference level. Reference article, Radiopaedia.org. (accessed on 24 May 2022) https://doi.org/10.53347/rID-80057
A diagnostic reference level (DRL) is a specified radiation dose for a given imaging study that is not expected to be exceeded.
If a radiation dose does exceed the diagnostic reference level for a particular study, this should prompt an investigation into radiographic technique or equipment performance.
Diagnostic reference level values vary based on local, regional and national data. They are typically set at the 75th percentile of a distribution of radiation doses.
Entrance skin dose (ESD) and dose area product (DAP) are typically used to measure diagnostic reference level values in radiography and fluoroscopy.
CT dose index and dose length product are typically used to measure diagnostic reference level values in CT.
- 1. E. Vañó, D.L. Miller, C.J. Martin, M.M. Rehani, K. Kang, M. Rosenstein, P. Ortiz-López, S. Mattsson, R. Padovani, A. Rogers. ICRP Publication 135: Diagnostic Reference Levels in Medical Imaging:. (2017) Annals of the ICRP. 46 (1): 1-144. doi:10.1177/0146645317717209 - Pubmed
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