Patent ID: 6318892
Filing Date: 2001-11-20
Classification: A61B,H05G

Abstract:
A radiography apparatus comprising an image pickup unit including an X ray source for irradiating cone shaped X ray beam to a patient under examination and an image receptor disposed opposite said X ray source for receiving X ray image data of the patient by the irradiated cone shaped X ray beam;a cylindrical ring which carries said image pickup unit, defines a sufficient space to receive the patient therein so as to permit relative positional change of the patient with respect to said image pickup unit and is supported so as to permit rotation around its center axis;a first arm which extends from said cylindrical ring along its center axis and supports said X ray source in said image pickup unit;a second arm which extends from said cylindrical ring along its center axis so as to oppose said first arm and supports said image receptor in said image pickup unit;an image pickup unit rotating mechanism which causes to rotate said cylindrical ring at least one rotation so as to permit rotation of said image pickup unit one time around the patient;a first video image processing unit which produces a radioscopic video image based on the X ray image data obtained from said image pickup unit;a second video image processing unit which reconstructs a three dimensional video image based on the X ray image data obtained from said image pickup unit; anda change-over device which changes-over the X ray image data obtained from said image pickup unit either to said first video image processing unit or to said second video image processing unit.