Patent ID: 8300907
Filing Date: 2012-10-30
Classification: A61N

Abstract:
1. A couch positioning system for radiotherapy, comprising: a first image file generator for setting a first calculation point to an X-ray CT image by calculating and storing 3D coordinates of the first calculation point used for couch positioning operations in the X-ray CT image and generating first image data for providing a first image which is a reference image for couch positioning based on CT image data for providing said X-ray CT image; adding the 3D coordinates of the first calculation point to the first image data; and storing the first image data to generate a first image file; and a couch positioning unit for displaying the first image using the first image file; displaying the first calculation point at a position corresponding to the first calculation point in the first image by use of 2D coordinates acquired from the 3D coordinates of the first calculation point; displaying a second image which is the present image of an irradiation target on the couch; setting a second calculation point used for the couch positioning operations at a target position corresponding to the first calculation point in the second image and performing operations for reconstructing 3D coordinates from the 2D coordinates of the second calculation point; and generating couch positioning data by use of the 3D coordinates of the first calculation point added to the first image data and the 3D coordinates of the second calculation point set to the target position in the second image.