Dosimetric consequence of three setup correction schemes for external-beam radiotherapy of prostate cancer

Abstract

Purpose/Objective: Conventionally, electronic portal imaging (or port film) is performed weekly on prostate cancer patients to remove setup errors based on pelvic bone registration. With the advent of image-guided therapy, more aggressive offline and online correction strategies have been proposed. This study aims to investigate whether these correction strategies significantly outperform weekly portal imaging and to what extent.