IMRT

Biological efficiency loss

Different “Times”:

➔ Treatment slots: time from the patient entering the bunker, until leaving the bunker

➔ Total treatment time: time from the first MV photon hitting the patient until the last photon, includes gantry rotation without beam

➔ Beam-on time: time the beam is actually on

➔ Dose accumulation pattern: the way a tissue volume is accumulating dose from primary beam during treatment