Patent ID: 8155266

Claim:
A fluoroscopy, comprising: a table top, for carrying a subject; an X-ray tube, movably held in a body axis direction of the subject parallel to the table top; an X-ray image detector, arranged opposite to the X-ray tube by sandwiching the table top there-between, and being movable in the body axis direction of the subject parallel to the table top; and an X-ray diaphragm, mounted on the X-ray tube and forming a rectangular X-ray irradiation field; wherein the fluoroscopy further comprises: a control means, for performing a control in one of a first control manner and a second control manner, wherein in the first control manner, the X-ray tube and the X-ray image detector are moved parallel to the table top in such a way that a focal point of the X-ray tube is located directly above a center of the X-ray image detector, and in the second control manner, when the X-ray irradiation field is altered on ends of the X-ray tube and the X-ray image detector being moved to a foot side of the subject parallel to the table top, the X-ray tube is moved in such a way that a foot side end of the X-ray irradiation field and a foot side end of the X-ray image detector are overlapped; and a control manner assigning means, for assigning the control means to perform the control in the first control manner or in the second control manner.