Prostate cancer image guided radiotherapy: Why the commotion over rectal volume and motion?

ABSTRACT:

Introduction

Distended rectums on pre-radiotherapy scans are historically associated with poorer outcomes in patients treated with two-dimensional IGRT. Subsequently, strict rectal tolerances and preparation regimes were implemented. Contemporary IGRT, daily online registration to the prostate, corrects interfraction motion but intrafraction motion remains. We re-examine the need for rectal management strategies when using contemporary IGRT by quantifying rectal volume and its effect on intrafraction motion.

Materials and methods

Pre and during radiotherapy rectal volumes and intrafraction motion were retrospectively calculated for 20 patients treated in 5-fractions and 20 treated in 20-fractions. Small (rectal volume at planning-CT ≤ median), and large (volume > median) sub

SUBMITTER: Alexander SE 

PROVIDER: S-EPMC10570575 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature