Patent ID: 6418186
Filing Date: 2002-07-09
Classification: A61B,Y10S

Abstract:
An X-ray imaging apparatus having an X-ray generating source (1) for irradiating X-ray beams on a subject, a multilayer X-ray imaging means (2) having two or more juxtaposed detector arrays each having X-ray detector cells (11) arranged in line and being disposed to oppose said X-ray generating source so as to measure X-ray images of said subject, rotation means for rotating an imaging system comprised of said X-ray generating source and said multilayer X-ray imaging means around said subject, moving means (5) for relatively moving said imaging system and said subject in a body axis direction of said subject, reconstructing means (101) for reconstructing a tomogram of said subject at a position specified by an inspector on the basis of the X-ray images, and display means (9) for displaying said tomogram, wherein said reconstructing means comprises selecting means (105) for selecting, from X-ray images measured from the 360Â° periphery of said subject at a cross-sectional position designated by said inspector, X-ray images measured within a range of âˆ’360Â° to +360Â° distant from a rotation angle of said imaging system at said cross-sectional position, interpolation operation means (103) for interpolating projection values of X-ray images in respect of individual pixels at said cross-sectional position by using distances in the moving direction of said moving means between positions of said selected X-ray images and said cross-sectional position and said selected X-ray images, and means (104) for reconstruction of the tomogram at said cross-sectional position from interpolated projection values.