Spectral grating-based differential phase contrast system for medical radiographic imaging
AssigneeCarestream Health, Inc.
InventorsPavlo Baturin, Mark E. Shafer
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Abstract
Embodiments of methods and apparatus are disclosed for obtaining a phase-contrast digital radiographic imaging system and methods for same that can include an x-ray source for radiographic imaging; a beam shaping assembly including a collimator and a source grating, an x-ray grating interferometer including a phase grating, and an analyzer grating; and an x-ray detector, where a single arrangement of the beam shaping assembly, the x-ray grating interferometer and a position of the detector is configured to provide spectral information (e.g. at least two images obtained at different relative beam energies).
Claims18
A digital radiographic (DR) phase-contrast imaging (PCI) system comprising:
- an x-ray source for radiographic imaging;
- a beam shaping assembly comprising a source grating G0;
- and
- an x-ray grating interferometer comprising, a phase grating G1, and
- an analyzer grating G2;
- where a single arrangement of the beam shaping assembly, the x-ray grating interferometer and a position of the detector is configured to provide at least two images obtained at different relative beam energies.
A method, comprising:
- providing an x-ray generator for radiographic imaging;
- providing a beam shaping assembly comprising a beam limiting apparatus and a source grating G0;
- providing an x-ray grating interferometer comprising a phase grating G1, and an analyzer grating G2;
- offsetting a pitch of the analyzer grating G2 relative to a pitch of an interference pattern produced by the phase grating G1 at a prescribed distance from the phase grating G1;
- and
- generating at least two images obtained at different relative beam energies by scanning the x-ray grating interferometer and an energy resolving detector once where an arrangement of the beam shaping assembly, the x-ray grating interferometer and a position of the detector is unchanged during the scan.
Dependencies are inferred from the claim text.