SU‐E‐J‐70: A Study of the Correlation of 3D Surface Matching and KV Imaging for Chestwall IMRT

Abstract

On average, 'cw' shifts correlated with kV shifts but exhibited significant inter-patient variability and larger rotations than 'all'. Differences between AlignRT and kV were ∼3mm for initial patient positioning. The lack of a one-to-one correspondence between surface and kV shifts in any single session must be further investigated before clinical implementation.