Basic Treatment Planning

Dose in ICRU83 Reporting of absorbed dose

Why not D 100%

and D 0%

(the earlier definition of min and max

absorbed dose)? E.g. PTV of 0.5 litres (radius 49.2 mm). radius changed by less than 0.2 mm => 1% change in volume D98% and D2% serve the purpose to report an absorbed dose that is not reliant on a single computation point.