Scanning system for differential phase contrast imaging
First Claim
1. An X-ray device for imaging an object, comprising:
- an X-ray emitter arrangement, andan X-ray detector arrangement,wherein the X-ray emitter arrangement is adapted to emit an X-ray beam through the object onto the X-ray detector arrangement,wherein the X-ray beam is spatially at least partially coherent,wherein the X-ray beam is fan-shaped,wherein the X-ray detector arrangement comprises a phase grating and an absorber grating,wherein the X-ray detector arrangement comprises a detector for detecting X-rays,wherein the X-ray detector is an area detector,wherein the X-ray device is adapted to generate image data from the detected X-rays and to extract phase information from the X-ray image data, the phase information relating to a phase shift of X-rays caused by the object,wherein the object has a region of interest which is larger than a detection area of the X-ray detector and the X-ray device is adapted to generate image data of the region of interest by moving the object and the X-ray detector arrangement relative to each other, wherein the X-ray emitter arrangement comprises an X-ray source with switchable emitter lines, wherein the X-ray emitter arrangement, in a direction of relative movement, of the X-ray detector arrangement with respect to the X-ray emitter arrangement, that is orthogonal to the beam, is larger than the X-ray detector arrangement, wherein the X-ray device is adapted to switch the emitter lines such that solely the emitter lines opposite to the X-ray detector arrangement are switched on.
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Accused Products
Abstract
The invention relates to the field of X-ray differential phase contrast imaging. For scanning large objects and for an improved contrast to noise ratio, an X-ray device (10) for imaging an object (18) is provided. The X-ray device (10) comprises an X-ray emitter arrangement (12) and an X-ray detector arrangement (14), wherein the X-ray emitter arrangement (14) is adapted to emit an X-ray beam (16) through the object (18) onto the X-ray detector arrangement (14). The X-ray beam (16) is at least partial spatial coherent and fan-shaped. The X-ray detector arrangement (14) comprises a phase grating (50) and an absorber grating (52). The X-ray detector arrangement (14) comprises an area detector (54) for detecting X-rays, wherein the X-ray device is adapted to generate image data from the detected X-rays and to extract phase information from the X-ray image data, the phase information relating to a phase shift of X-rays caused by the object (18). The object (18) has a region of interest (32) which is larger than a detection area of the X-ray detector (18) and the X-ray device (10) is adapted to generate image data of the region of interest (32) by moving the object (18) and the X-ray detector arrangement (14) relative to each other.
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Citations
19 Claims
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1. An X-ray device for imaging an object, comprising:
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an X-ray emitter arrangement, and an X-ray detector arrangement, wherein the X-ray emitter arrangement is adapted to emit an X-ray beam through the object onto the X-ray detector arrangement, wherein the X-ray beam is spatially at least partially coherent, wherein the X-ray beam is fan-shaped, wherein the X-ray detector arrangement comprises a phase grating and an absorber grating, wherein the X-ray detector arrangement comprises a detector for detecting X-rays, wherein the X-ray detector is an area detector, wherein the X-ray device is adapted to generate image data from the detected X-rays and to extract phase information from the X-ray image data, the phase information relating to a phase shift of X-rays caused by the object, wherein the object has a region of interest which is larger than a detection area of the X-ray detector and the X-ray device is adapted to generate image data of the region of interest by moving the object and the X-ray detector arrangement relative to each other, wherein the X-ray emitter arrangement comprises an X-ray source with switchable emitter lines, wherein the X-ray emitter arrangement, in a direction of relative movement, of the X-ray detector arrangement with respect to the X-ray emitter arrangement, that is orthogonal to the beam, is larger than the X-ray detector arrangement, wherein the X-ray device is adapted to switch the emitter lines such that solely the emitter lines opposite to the X-ray detector arrangement are switched on. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An X-ray device for imaging an object, comprising:
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an X-ray emitter arrangement, and an X-ray detector arrangement, wherein the X-ray emitter arrangement is adapted to emit an X-ray beam through the object onto the X-ray detector arrangement, wherein the X-ray beam is spatially at least partially coherent, wherein the X-ray beam is fan-shaped, wherein the X-ray detector arrangement comprises a phase grating and an absorber grating, wherein the X-ray detector arrangement comprises a detector for detecting X-rays, wherein the X-ray detector is an area detector, wherein the X-ray device is adapted to generate image data from the detected X-rays and to extract phase information from the X-ray image data, the phase information relating to a phase shift of X-rays caused by the object, wherein the object has a region of interest which is larger than a detection area of the X-ray detector and the X-ray device is adapted to generate image data of the region of interest by moving the object and the X-ray detector arrangement relative to each other, wherein said device has a focal spot, and wherein the movement-based generating entails rotating said X-ray detector arrangement around an axis that goes through said focal spot while said focal spot remains stationary. - View Dependent Claims (9, 10, 11)
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12. A non-transitory computer-readable medium embodying a computer program for controlling an X-ray device, said program having instructions executable by a processor for performing a plurality of acts, from among said plurality there being the acts of:
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generating a fan-shaped X-ray beam that is spatially at least partially coherent, transmitting the X-ray beam through an object, a phase grating and an absorber grating onto an X-ray area detector, generating image data from X-rays detected by the X-ray area detector, extracting phase information from the image data, the phase information relating to a phase shift of X-rays caused by the object; moving, relative to each other, the object and an X-ray detector arrangement comprising said X-ray area detector; and generating image data of a region of interest of the object, wherein the region of interest is larger than a detection area of the X-ray area detector, wherein said X-ray beam has a focal spot and among said plurality there further being the act of rotating said X-ray detector arrangement around an axis that goes through said focal spot while said focal spot remains stationary. - View Dependent Claims (13, 14)
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15. A non-transitory computer readable medium embodying a computer program for controlling an X-ray device, said program having instructions executable by a processor for performing a plurality of acts, from among said plurality there being the acts of:
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emitting, via an X-ray emitter arrangement, an X-ray beam through the object onto an X-ray detector arrangement, wherein the X-ray beam is spatially at least partially coherent, wherein the X-ray beam is fan-shaped, wherein the X-ray detector arrangement comprises a phase grating and an absorber grating, wherein the X-ray detector arrangement comprises a detector for detecting X-rays, wherein the X-ray detector is an area detector; generating, via said X-ray device, image data from the detected X-rays; extracting phase information from the X-ray image data, the phase information relating to a phase shift of X-rays caused by the object, wherein the object has a region of interest which is larger than a detection area of the X-ray detector; generating image data of the region of interest by moving the object and the X-ray detector arrangement relative to each other, wherein the X-ray emitter arrangement comprises an X-ray source with switchable emitter lines, wherein the X-ray emitter arrangement, in a direction of relative movement, of the X-ray detector arrangement with respect to the X-ray emitter arrangement, that is orthogonal to the beam, is larger than the X-ray detector arrangement; and switching the emitter lines such that solely the emitter lines opposite to the X-ray detector arrangement are switched on. - View Dependent Claims (16, 17, 18, 19)
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Specification