Abstract

Aims: Despite image-guided radiotherapy for prostate cancer, there remain uncertainties regarding dose delivered to intended planning target volumes [1]. To reduce intra-fraction variability, daily bowel and bladder preparation are now incorporated in most protocols [2]. However, the impact of these on prostate movements (PM) and deformation (PD) is yet not completely understood to aid anisotropic margins [3]. Our aim is to assess the impact of differential rectal filling on PM and PD.

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