Patent ID: 7436928
Filing Date: 2008-10-14
Classification: A61N

Abstract:
1. A radiotherapy device control apparatus for controlling a radiotherapy device, wherein the radiotherapy device includes: a therapeutic radiation irradiation device which radiates therapeutic radiation; and an imager which generates an imager image of a subject by using radiation transmitted through the subject, said radiotherapy device control apparatus comprising: a characteristic place extracting section for creating a plurality of projective templates, each of which indicates a change in projection brightness obtained by projecting each of a plurality of image templates in one direction, wherein positional relations between an object area and a non-object area of the subject are different from each other in said plurality of image templates, and for creating characteristic place templates indicating portions common to said plurality of projective templates; and an affected area position calculating section for calculating a position of said object area by executing pattern matching on said characteristic place templates with a pattern indicating change in projection brightness obtained by projecting the imager image in one direction.