Patent ID: 8130906

Claim:
A radiation imaging and therapy apparatus comprising: a table formed with an opening for allowing a breast of an examinee to pass through when the examinee lies down on the table; an imaging unit rotatable around a rotational axis, which is substantially orthogonal to said table and passes through said opening, and including a first radiation generating unit for applying an imaging radiation beam, which has a conical shape, toward the breast passing through the opening of said table and a radiation detecting unit for two-dimensionally detecting the radiation beam applied by said first radiation generating unit and transmitted through the breast to output detection signals; a therapy unit rotatable around the rotational axis, and including a second radiation generating unit for applying a therapeutic radiation beam, which is thinner than the imaging radiation beam, toward the breast passing through the opening of said table, said second radiation generating unit being movable in a tangential direction of a rotational track around the rotational axis and movable in a direction substantially orthogonal to said table; at least one rotational driving device for rotating said imaging unit and said therapy unit around the rotational axis; a driving device for moving said second radiation generating unit within a plane at a predetermined distance from the rotational axis; an image signal generating unit for generating an image signal representing one of radiation images and a radiation tomographic image based on the detection signals outputted from said radiation detecting unit; and an operation condition control unit for obtaining coordinates representing a location of a lesion within the breast based on one of the radiation images and the radiation tomographic image represented by the image signal generated by said image signal generating unit, and controlling said at least one rotational driving device and said driving device such that the therapeutic radiation beam is applied from said second radiation generating unit toward the lesion.