Patent ID: 9048002
Filing Date: 2015-06-02
Classification: G01N,G21K,Y10T

Abstract:
1. In a focused anti-scatter grid comprising an open rectangular frame containing two brackets on two opposing sides of the grid, each bracket incorporating a plurality of narrow slits where the planes of the slits are orthogonal to the long axis of the brackets and are each inclined in the direction along the slit, to converge to a single focus line in a plane parallel to the surface of the frame that contains the locus of the x-ray source; the planes of the slits are not parallel but are arrayed along the brackets so that the plane bisecting each slit describes a fixed angle from the focus line, with respect to the planes bisecting adjacent slits; the planes of the slits on one bracket are precisely aligned with the planes of the slits on the opposing bracket; thin, heavy metal ribbons extend through the slits in each bracket to the opposing bracket, and have a height corresponding to the depth of the slits; the width of the slits is formed to exceed the thickness of the ribbons by 50-100%; and and the two brackets extend substantially parallel to each other so that all ribbons in the grid are of equal length, sufficient to exceed the spacing between corresponding brackets across the open frame so as to extend beyond each bracket, the improvement comprising: