Patent ID: 9597050
Date: 2017-03-21
CPC Classifications: A61B,F04C,G21K

Claim:
1. An X-ray imaging system for phase contrast imaging of an object, comprising: an X-ray source; an X-ray detector arrangement; and a grating arrangement; wherein the X-ray detector arrangement comprises at least eight line-detector units arranged parallel to each other in a first direction, wherein the at least eight line-detector units extend linearly in a direction perpendicular to the first direction, wherein the X-ray source, the X-ray detector arrangement and the grating arrangement are configured to perform an acquisition movement in relation to the object in a scanning direction, the scanning direction being parallel to the first direction, wherein the grating arrangement comprises a phase-grating structure arranged between the X-ray source and the X-ray detector arrangement, and an analyzer-grating structure arranged between the phase-grating structure and the X-ray detector arrangement, wherein the phase-grating structure comprises a number of linear phase-gratings, each of which is arranged in a first fixed association with an assigned line-detector unit of the at least eight line-detector units, wherein a first part of the number of linear phase-gratings comprises first phase-gratings with slits in the first direction, and a second part of the number of linear phase-gratings comprises second phase-gratings with slits in a second direction different than the first direction, wherein the analyzer-grating structure comprises a number of linear analyzer-gratings, each of which is arranged in a second fixed association with an assigned line-detector unit of the at least eight line-detector units, wherein a first part of the number of linear analyzer-gratings comprises first analyzer-gratings with slits in the first direction, and a second part of the number of linear analyzer-gratings comprises second analyzer-gratings with slits in the second direction, wherein at least four adjacent lines of the at least eight line-detector units are associated with the first phase-gratings and the first analyzer-gratings, and wherein at least four adjacent lines of the at least eight line-detector units are associated with the second phase-gratings and the second analyzer-gratings, and wherein for the acquisition movement, the phase-grating structure and the analyzer-grating structure remain fixed in relation to each other and in relation to the X-ray detector arrangement.