Patent ID: 8315358
Filing Date: 2012-11-20
Classification: A61B,G21K,H01J

Abstract:
1. A diffraction enhanced imaging system comprising: an X-ray source configured to generate a first X-ray beam; a first monochromator crystal positioned to intercept the first X-ray beam for producing a second X-ray beam; a second monochromator crystal positioned to intercept the second X-ray beam to produce a third X-ray beam for transmission through an object, wherein the second monochromator crystal has a thickness selected such that a mechanical strain on a side of the first monochromator crystal is the same as a mechanical strain on a side of the second monochromator crystal; an analyzer crystal having a thickness selected such that a mechanical strain on a side of the first monochromator crystal is the same as a mechanical strain on a side of the analyzer crystal, wherein the analyzer crystal is positioned to intercept transmitted X-ray beams at angles of incidence of the analyzer crystal; and an image detector configured to detect an image of the object from one or more beams diffracted from the analyzer crystal, wherein the image detector is configured to: detect a first angle image of the object from first diffracted beams emitted from the analyzer crystal positioned at first angular positions; and detect a second angle image of the object from second diffracted beams emitted from the analyzer crystal positioned at second angular positions; and wherein the system further comprises a computer configured to: combine the first and second angle images to derive a refraction and apparent absorption image; and derive a mass density image of the object from the refraction image.