Basic Treatment Planning

Dose in ICRU83 Quality assurance for IMRT treatment plans Previous

5% point dose accuracy specification

Replaced by volumetric dose accuracy specification for IMRT Not limited to single point High gradient (≥20%/cm):85% of points within 5 mm (1 SD of 3.5 mm) Low gradient (<20%/cm): 85% of points within 5% of predicted dose normalized to the prescribed dose