Patent ID: 8794832

Claim:
An X-ray diagnostic imaging apparatus, comprising: a first arm; an X-ray generation unit held by the first arm, the X-ray generation unit irradiating X-ray to an object to be examined on a top panel; an X-ray detection unit held by the first arm, the X-ray detection unit opposing to the X-ray generation unit to detect X-ray emitted from the X-ray generation unit and penetrated through the object, the X-ray detection unit generating X-ray projection data; an image data generation unit to generate image data based on the X-ray projection data which is obtained from the X-ray detection unit; and a mechanism unit to move the first arm, wherein the mechanism unit is provided with a first support member to support the first arm, the first support member rotating the first arm around a rotation center and in a first rotation direction, a second support member to hold the first support member, the second support member rotating the first support member around the rotation center and in a second rotation direction perpendicular to the first rotation direction, and a second arm having two end portions, one of the end portions supporting the second support member, the second arm rotating the second support member in the same direction as the first rotation direction and moving the second support member in an up and down direction, and a third support member arranged to support the other of the end portions of the second arm, the third support member tilting the second arm in an up and down direction such that the second arm is not positioned to project beyond the second support member in a direction where the one of the end portions is seen from the other of the end portions, and wherein the mechanism unit is configured to move the first support member and the second support member in an up and down direction at the same time when the top panel is moved in an up and down direction, and is configured to receive a receding instruction in receding operation, so that the first arm is rotated and is stopped at an angle where the first arm becomes approximately horizontal by a receding operation of the first arm and further that the second arm is moved in an upward direction and is stopped at a position where the second arm reaches a receding position.