Patent ID: 7062009
Filing Date: 2006-06-13
Classification: A61B,G01N,G21K,Y10S

Abstract:
1. A CT system for reconstructing at least one image of an object, said system comprising: a. an x-ray source for generating x-rays, said x-ray source being mounted on a gantry for rotation about an axis; b. an x-ray detector system mounted opposite said x-ray source for providing a set of projection data with respect to said object as the object is translated along said axis, said x-ray detector system including a plurality of rows of detector elements; wherein for each detector element, a corresponding detector ray is defined by x-ray photons traveling from said x-ray source to said detector element; and wherein said detector rays define an x-ray beam that is asymmetric in a plane perpendicular to said axis, said x-ray beam including a symmetric region in which one or more complementary rays can be found for each detector ray, and an asymmetric region in which no complementary ray can be found for any detector ray; c. an interpolator for interpolating said projection data from each detector element onto a slice plane by multiplying said data with helical interpolation weights; d. an image reconstructor for reconstructing a tomographic image of said object using said helically interpolated projection data.