Patent ID: 8682414
Filing Date: 2014-03-25
Classification: A61N

Abstract:
1. A radiation therapy apparatus control method of using a radiation therapy apparatus controller as part of a computer for controlling a therapeutic radiation ray irradiation device that irradiates a target subject with a therapeutic radiation ray, the radiation therapy apparatus control method comprising: calculating, via the radiation therapy apparatus controller, a plurality of degrees of similarity corresponding to a plurality of matching target areas based on a radiographic image in which the target subject is imaged; calculating, via the radiation therapy apparatus controller, a specific image position where a specific image area is positioned in the radiographic image, the specific image area (i) corresponding to a degree of similarity having a maximum value of the plurality of degrees of similarity and (ii) being an area from the plurality of matching target areas; and calculating, via the radiation therapy apparatus controller, a drive amount with which the therapeutic radiation ray irradiation device irradiates the target subject with the therapeutic radiation ray is driven, the drive amount being calculated based on the calculated specific image position, wherein, when one of the plurality of degrees similarity corresponding to one of the plurality of matching target areas is calculated by said calculating of the plurality of degrees of similarity, said calculating of the plurality of degrees of similarity: wherein the radiation therapy apparatus control method further comprises generating the template table based on all templates generated from a plurality of template generation radiographic images obtained at a plurality of different times by an imager imaging the radiographic image and a plurality of template positions where all of the generated templates are displayed in the plurality of template generation radiographic images, wherein each of the plurality of template generation radiographic images is divided into a first area and a second area with a straight line passing through one matching target position where the one matching target area is positioned in the radiographic image, wherein the set of templates includes: wherein the straight line passing through the one matching target position is perpendicular to a straight line connecting the first template position and the one matching target position.