IMRT 2017

IMRT DELIVERY TECHNIQUES

sIMRT : static IMRT beam ON when leaves are set @ each segment position less leakage radiation and transmission over critical structures (OAR) allows max dose rate delivery (treatment time reduction) step-dose gradients are easier to obtain (hotspots inside target are common) – – – –

dIMRT : dynamic IMRT

beam ON during all the sliding segment sequence leakage radiation increases due to continuous beam delivery dose rate is limited to allow max leaf speed fluence modulation is, in general, softer