Patent ID: 7263158
Filing Date: 2007-08-28
Classification: A61B,G01N,G01T

Abstract:
1. An X-ray CT apparatus comprising: an X-ray tube which applies a cone X-ray beam spread in a thickness direction thereof; an X-ray detector which is two-dimensionally arranged in a plane approximately orthogonal to the direction of application of the X-ray beam and which detects the X-ray beam and converts the same to an electric signal; and a data acquisition section having receivers each amplifying the electric signal, wherein the data acquisition section has a switching unit which turns on and off wirings for electrically connecting the X-ray detector and the receivers and selects the X-ray detector for performing said detection, and wherein the switching unit has composite detector selecting means placed within a plane of the two-dimensionally arranged X-ray detector and in which an electrical connection for allowing the two X-ray detectors adjacent in a coordinate-axis direction indicative of an X-ray detector position in the thickness direction or in a channel direction orthogonal to the thickness direction to operate as one composite detector is repeatedly performed in the coordinate-axis direction, and an electrical connection in which a position of said repetition of electrical connection is shifted in the coordinate-axis direction by one X-ray detector is performed between the X-ray detectors adjacent in an orthogonal-axis direction normal to the coordinate-axis direction.