Patent ID: 6307914
Filing Date: 2001-10-23
Classification: A61B,A61N

Abstract:
A moving body pursuit irradiating device comprising:a linac for irradiating a medical treatment beam to a tumor;a tumor marker buried in the vicinity of the tumor;a first X-ray fluoroscope for picking up an image of said tumor marker from a first direction;a second X-ray fluoroscope for picking up the image of said tumor marker from a second direction at the same time as said first X-ray fluoroscope;first and second image input sections for digitizing first and second fluoroscopic images outputted from said first and second X-ray fluoroscopes;first and second recognition processing sections which execute template matching at a real time level at a predetermined frame rate by a shading normalization mutual correlation method for applying a template image of the tumor marker registered in advance to image information digitized by said first and second image input sections, and calculate first and second two-dimensional coordinates of said tumor marker;a central arithmetic processing section for calculating three-dimensional coordinates of said tumor marker from the first and second two-dimensional coordinates calculated by said first and second recognition processing sections; andan irradiating control section for controlling the irradiation of the medical treatment beam of said linac by said calculated three-dimensional coordinates of the tumor marker.