Patent ID: 6445764
Filing Date: 2002-09-03
Classification: A61B,G01N

Abstract:
A multi-slice X-ray CT apparatus provided with an X-ray generator and an X-ray detector disposed facing each other with a subject placed therebetween, said X-ray detector having a plurality of detector arrays for detecting X-rays from said X-ray generator, said apparatus rotating said X-ray generator and said X-ray detector to reconstruct a plurality of X-ray tomographic images in a direction of conveying said subject, said apparatus comprising:a collimator for forming a slit defining a range of X-rays generated by said X-ray generator impinging upon said X-ray detector, and collimator regulator means for regulating the width of said slit corresponding to said direction of conveying the subject, wherein not all the widths of said X-ray detector arrays in said X-ray detector in said direction of conveying the subject are the same, and wherein the number of X-ray detector arrays in said X-ray detector is four, and the widths of the outer X-ray detector arrays in said conveying direction are larger than the widths of two center detector arrays in said conveying direction.