Patent ID: 6219403
Filing Date: 2001-04-17
Classification: A61N

Abstract:
A radiation therapy system using a center projection image synthesizing method for creating an image for determining the range of irradiation of radiation beams, in an arrangement wherein irradiation of radiation beams is aimed at a specific portion within the body of a subject, said system comprising:a means for establishing a marker at said specific portion including the surface of said subject, and for specifying as an area of interest an area corresponding with said specific portion in 3-D data regarding inside of the body of said subject which has been obtained with a CT apparatus; anda means for calculating a projection image for said area of interest according to a center-of-projection point at geometric conditions set for the area of interest and said marker, and/or said 3-D data;wherein said geometric conditions are the same as the geometric conditions for the point of origin for irradiation of radiation beams to the portion corresponding with the area of interest in the body of the subject.