Patent ID: 6269140
Filing Date: 2001-07-31
Classification: A61B

Abstract:
An x-ray computerized tomography apparatus comprising:a cyclic movement detector detecting a cyclic movement of a living body to be examined and producing an output signal representing the cyclic movement of a part of said living body;an x-ray source irradiating said living body with x-rays;an x-ray detector detecting ones of said x-rays transmitted through said living body to obtain scan data with respect to multiple slices of said living body;a rotational member supporting said x-ray source and said x-ray detector on said rotational member on opposite sides of said living body and rotating around said living body;a driving mechanism driving a rotation of said rotational member;a slice position changing unit for changing a scanning position on said living body; anda control unit controlling a rotational speed of said rotational member in accordance with said output signal of said cyclic movement detector so that said x-ray detector collects the scan data necessary for complete reconstruction of a CT image for each slice of said living body within a single cycle of said cyclic movement of the part of said living body, and controlling said slice position changing unit and said driving mechanism to start scanning on different slices of said living body at substantially a same phase within different cycles of said cyclic movement of said part of said living body.