Equivalent Uniform Dose
Also written as: EUD — Equivalent Uniform Dose
Radiobiological concept representing the uniform dose that would produce the same biological effect as a non-uniform dose distribution.
Full Definition
Equivalent Uniform Dose (EUD) is a radiobiological model that reduces complex dose distributions to a single equivalent uniform dose value. This concept accounts for the volume effect in radiation response, where the same mean dose delivered uniformly versus non-uniformly can produce different biological outcomes. EUD calculations incorporate tissue-specific parameters and are used in treatment plan optimization and outcome prediction. The model helps quantify the trade-offs between dose escalation and normal tissue sparing in complex treatment geometries.
Usage
Usage note: Often abbreviated as EUD in treatment planning documentation.
In Context
- "The equivalent uniform dose calculation showed superior normal tissue sparing with the VMAT plan." — Plan comparison report
- "EUD-based optimization was used to balance target coverage with organ at risk constraints." — Treatment planning documentation