Patent ID: 9084541
Filing Date: 2015-07-21
Classification: A61B

Abstract:
1. 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; a support mechanism configured to rotatably support the X-ray tube and the X-ray detector; an input unit configured to repeatedly input, from an electrocardiograph, a trigger signal originating from a specific cardiac phase in a cardiac cycle of the heart of the subject; an RR period determination unit configured to determine whether a period between an input time point of a latest trigger signal, of the repeatedly input trigger signals, and an input time point of a trigger signal immediately before the latest trigger signal is not less than a preset first threshold, for each input of the latest trigger signal; a condition determination unit configured to determine whether projection data which is configured to be substantially used for image reconstruction at a reconstruction target phase have been acquired, if it is determined that the period is not less than the first threshold; a control unit configured to terminate generation of X-rays from the X-ray tube, if it is determined that the projection data which is configured to be substantially used have been acquired.