IGRT 2016 Madrid

kV, gantry-mounted: Isocenter calibration example of calibration tool

Jeung et al, ESTRO 2010 IsoCal, Varian Medical Systems •16 BBs, 4mm, should overlap when imaged • Collimator insert, with a pin to determine MV central axis •Automatic imager correction while the gantry is turning •About 15 min for calibration procedure