Patent ID: 7623619

Claim:
An X-ray CT apparatus comprising: a front-side rotation frame configured to mount at least one X-ray tube for irradiating X-rays through an object and at least one X-ray detector provided at a position facing the X-ray tube in order to detect the irradiated X-rays passing through the object; a rear-side rotation frame configured to mount rotation units other than the at least one X-ray tube and the at least one X-ray detector, the other rotation units including at least one high voltage generating unit for supplying a high voltage to the at least one X-ray tube; a main frame configured to support the front-side rotation frame and the rear-side rotation frame; a plurality of bearing units provided on a circular surface of the main frame at a position between the front-side rotation frame and the rear-side rotation frame and separated so as to form a smaller major diameter than the diameter of the respective side of the rotation frame; and a frame coupling portion configured to couple the front-side rotation frame and the rear-side rotation frame to the plurality of bearing units.