IMRT

The Beaumont offline adaptive RT approach: Eliminate systematic errors of the organ geometry!

CTV_hull = hull of 3-5 prostate contours (planning CTV and first days of treatment) PTV = CTV_hull + patient-individual margin, adapted according to setup errors measured during first 5 fractions (~5mm) corresponding rectum contours of the first 3-5 treatment days; Beaumont approach: dose constraint to rectal-wall structure as in planning CT alternative approach: constraints to Rectum_hull = hull of 3-5 rectum contours, no PRV margin

ESTRO IMRT course 2015 Adaptive Radiotherapy Brussels October 8th, 2015

-25-