Method for coded-source phase contrast X-ray imaging
First Claim
1. A method for phase contrast imaging using an array of independently controllable x-ray sources, the steps of the method comprising:
- a) directing an array of independently controllable x-ray sources to produce x-ray radiation in a distinct spatial pattern by selectively energizing the independently controllable x-ray sources in the array;
b) detecting phase-contrast signals of the x-ray radiation after the x-ray radiation passes through a subject using an x-ray detector; and
c) reconstructing an image of the subject by performing a compressed sensing reconstruction technique on the detected phase-contrast signals, wherein the reconstructed image depicts an image contrast indicative of phase shifts in the x-ray radiation.
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Abstract
Described here is a method for performing phase contrast imaging using an array of independently controllable x-ray sources. The array of x-ray sources can be controlled to produce a distinct spatial pattern of x-ray radiation and thus can be used to encode phase contrast signals without the need for a coded aperture. The lack of coded aperture increases the flexibility of the imaging method. For instance, because a fixed, coded aperture is not required, the angular resolution of the imaging technique can be increased as compared to coded-aperture imaging. Moreover, the lack of a radioopaque coded aperture increases the photon flux that reaches the subject, thereby increasing the attainable signal-to-noise ratio.
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Citations
10 Claims
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1. A method for phase contrast imaging using an array of independently controllable x-ray sources, the steps of the method comprising:
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a) directing an array of independently controllable x-ray sources to produce x-ray radiation in a distinct spatial pattern by selectively energizing the independently controllable x-ray sources in the array; b) detecting phase-contrast signals of the x-ray radiation after the x-ray radiation passes through a subject using an x-ray detector; and c) reconstructing an image of the subject by performing a compressed sensing reconstruction technique on the detected phase-contrast signals, wherein the reconstructed image depicts an image contrast indicative of phase shifts in the x-ray radiation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification