초록 ▼

A radiation therapy system has a radiation therapy planning CT system and a radiation therapy apparatus. The CT system includes a system control unit, a CT scanner unit, and a therapy planning portion. The collected data obtained by the CT scanner unit is output to the therapy planning unit. The the

A radiation therapy system has a radiation therapy planning CT system and a radiation therapy apparatus. The CT system includes a system control unit, a CT scanner unit, and a therapy planning portion. The collected data obtained by the CT scanner unit is output to the therapy planning unit. The therapy planning portion creates therapy planning data such as center projection images for when performing therapy and center projection images for when performing X-ray photography. On the other hand, the radiation therapy planning apparatus includes a central control unit, an apparatus proper, and a driving control unit. The driving control unit controls in real-time the period of irradiation of radiation based on the therapy planning data from the CT scanner unit 34 and the opening/closing of the collimator 97, according to the position of the marker 9 on the fluoroscopy image photographed by the X-ray TV. Such an arrangement provides a radiation treatment method and system which does away with deterioration in precision owing to bodily movement during irradiation.

대표청구항 ▼

[ What is claimed is:] [1.]1. 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

[ What is claimed is:] [1.]1. 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.