Patent ID: 8767915
Filing Date: 2014-07-01
Classification: A61B,G01N,G21K,H05G

Abstract:
1. A differential phase contrast X-ray imaging system, comprising: an X-ray illumination system; a beam splitter arranged in an optical path of said X-ray illumination system; and a detection system arranged in an optical path to detect X-rays after passing through said beam splitter, said detection system comprising an X-ray detection component, wherein said beam splitter comprises a splitter grating arranged to intercept an incident X-ray beam and provide an interference pattern of X-rays, wherein said detection system comprises an analyzer grating arranged to intercept and block at least portions of said interference pattern of X-rays prior to reaching said X-ray detection component, wherein said analyzer grating has a longitudinal dimension, a lateral dimension that is orthogonal to said longitudinal dimension and a transverse dimension that is orthogonal to said longitudinal and lateral dimensions, said analyzer grating comprising a pattern of optically dense regions each having a longest dimension along said longitudinal dimension and being spaced substantially parallel to each other in said lateral dimension such that there are optically rare regions between adjacent optically dense regions, wherein each optically dense region has a depth in said transverse dimension that is smaller than a length in said longitudinal dimension, wherein said analyzer grating is arranged with said longitudinal dimension at a shallow angle relative to incident X-rays, and wherein said shallow angle is less than 30 degrees.