Clinical evaluation of interfractional variations for whole breast radiotherapy using 3-dimensional surface imaging.

Purpose: To evaluate the impact of 3-dimensional (3D) surface imaging on daily patient setup for breast radiotherapy.

Materials And Methods: Fifty patients undergoing treatment for whole breast radiotherapy were setup daily using an AlignRT system (VisionRT, London, UK) for 3D surface-based alignment. Daily alignments were performed against a reference surface topogram and shifts from skin marks were recorded daily.