DIFFERENTIAL PHASE CONTRAST IMAGING DEVICE WITH MOVABLE GRATING(S) Russian patent published in 2018 - IPC A61B6/03 A61B6/06 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medical equipment, particularly to X-ray differential phase contrast imaging means. Device comprises an X-ray source for generating an X-ray beam, source grating (G0) for generating a coherent X-ray beam from a noncoherent X-ray source, a collimator comprising slits for splitting the coherent X-ray beam into a plurality of fan-shaped X-ray beams for passing through an object, phase grating (G1) for generating an interference pattern and absorber grating (G2) for generating a Moire pattern from the interference pattern arranged after the object, a line detector comprising detector lines for detecting the Moire pattern generated by phase grating (G1) and absorber grating (G2) from the fan-shaped X-ray beams passing through the object, wherein the X-ray source, source grating (G0), collimator, phase grating (G1), absorber grating (G2) and line detector are fixed to a common gantry and are movable with respect to the object, such that a number of interference patterns from different positions of the gantry are detectable for reconstructing a differential phase image of the object, wherein the groups of grating lines and the transparent areas alternate with respect to each other in a direction perpendicular to the direction of the detector lines, wherein at least one grating (G0, G1, G2) of the source grating, the phase grating and the absorber grating comprises groups of grating lines and transparent areas between the groups of grating lines, and is movable with respect to the gantry, such that in a first position of source grating (G0) the X-ray beams pass through the grating lines and subsequently pass through the slits of the collimator and in a second position of source grating (G0) the X-ray beams pass through the transparent areas and subsequently pass through the slits of the collimator, or in a first position at least one of phase grating (G1) or absorber grating (G2) the fan-shaped X-ray beams pass through the grating lines and in a second position at least one of phase grating (G1) or absorber grating (G2) the fan-shaped X-ray beams pass through the transparent areas. Method for acquiring differential phase image data and the absorption image data is performed by said device.

EFFECT: use of inventions widens the range of X-ray differential phase contrast imaging means.

15 cl, 6 dwg