Novel feature based image registration for automated patient positioning

Abstract

In radiotherapy, current feature based image registration techniques (point or curve based) lack robustness and automation: curve based registrations require user input and can be affected by edge selection and noise, while point based techniques require equivalent and/or ordered point sets in the target and reference images. This limits their use for patient positioning using EPID imaging, and in optical based camera systems (bite-block intra-cranial positioning, external marker based body positioning and patient surface imaging).