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X-ray detection of X-ray incident fringe pattern in phase-contrast and/or dark-field X-ray imaging
X-ray detection of X-ray incident fringe pattern in phase-contrast and/or dark-field X-ray imaging
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机译:在相衬和/或暗场X射线成像中对X射线入射条纹图案的X射线检测
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摘要
In a conventional phase-contrast X-ray imaging system, a source grating G0 generates an array of partially coherent line sources which illuminate an object and thereafter phase grating G1. The periodicity in the phase grating is self-imaged at certain instances further away from the X-ray source and sampled by a mechanically movable third absorptive analyzer grating G2 before the demodulated fringe intensity is detected by a conventional X-5 ray detector. This application proposes to directly demodulate the fringe intensity using a structured scintillator having a plurality of slabs in alignment with sub-pixels of an optical detector layer, in combination with electronic signal read-out approaches. Therefore, a mechanically movable third absorptive analyzer grating G2 can be omitted from a phase-contrast X-ray imaging system.
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