IMRT

The vocabulary of “Treatment Times”

Different “Times”:

➔ Treatment slots: reserved time on the machine, 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 therapeutic MV beam is actually on

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