Patent ID: 8693620

Claim:
An X-ray computed tomography apparatus comprising: an X-ray tube configured to generate X-rays; an X-ray detector configured to detect X-rays generated from the X-ray tube and transmitted through a subject and generate an electrical signal corresponding to the detected X-rays; an acquisition unit configured to acquire the projection data corresponding to the electrical signal via the X-ray detector; a rotating mechanism configured to rotatably support the X-ray tube and the X-ray detector around the subject; an input unit configured to repeatedly input trigger signals originating from a specific phase of a periodic motion of a body of the subject or a periodic motion of an organ of the subject, the trigger signals being supplied from a measuring device which measures the periodic motion; a control unit configured to cause the X-ray tube to start generating X-rays on the basis of an input of a first trigger signal of the repeatedly input trigger signals, and to cause the X-ray tube to stop generating X-rays on the basis of an input of a second trigger signal next to the first trigger signal in order to repeatedly scan the subject over substantially one period of the movement while a scan position is fixed; and a reconstruction unit configured to reconstruct data of an image associated with the subject based on the projection data.