X-ray computerized tomography apparatus control method therefor and image generating method using the apparatus

摘要

An X-ray computerized tomography apparatus which includes: an X-ray generating source for irradiating an object with X-rays; a unit for detecting X-rays transmitted through the object; a scan unit for controlling direction of irradiation with X-rays so that a periphery of the object is scanned in a predetermined direction with the X-rays from the X-ray generating source; and a control unit for controlling a scan speed of the scan unit on the basis of an external signal synchronized with movement of a part or whole of the object. An X-ray computerized tomography apparatus which includes: a rotary member on which an X-ray source and an X-ray detector are disposed so as to be opposite to each other with respect to a center of rotation of the rotary member; an opening portion provided so that an object can be arranged on the center of rotation of the rotary member; a scan control section for controlling drive of the X-ray source and the rotary member so that the rotary member rotates to thereby perform scan on the periphery of the object with the X-rays in a direction of a sliced face crossing a body axis of the object; an image reconstituting section for generating a slice image signal of the object on the basis of an output signal of the X-ray detector obtained during the scan; a display unit for displaying a slice image of the object on the basis of the slice image signal; and a scan speed control section for receiving an electrocardiogram signal of the object to thereby control a rotational speed of the rotary member on the basis of the electrocardiogram signal. An image generating method by using an X-ray computerized tomography apparatus, which includes the steps of: scanning an object with X-rays along a sliced face crossing a body axis of the object while an irradiation source of the X-rays is rotated around the object; changing relative positions of the object and the irradiating source along the direction of the body axis and repeating the step of scanning the object with the X-rays every time the relative positions are changed; receiving an electrocardiogram signal of the object and controlling a scan speed of the X-rays synchronously with a period of the electrocardiogram signal; detecting the X-rays transmitted through the object every time the scan is performed to thereby collect image information with respect to a sliced face of the object; and generating three-dimensional image information of the object on the basis of image information collected by scan on a plurality of different sliced faces.