Phase retrieval from differential phase contrast imaging
AssigneeCarestream Health, Inc.
InventorsPavlo Baturin, Richard A. Simon
Life of this patent
Estimating the term…
Abstract
Embodiments of methods and apparatus are disclosed for obtaining differential phase contrast imaging system and methods for same. Method and apparatus embodiments can provide regularized phase contrast retrieval that can address noise reduction and/or edge enhancement. Certain exemplary embodiments can suppress stripe artifacts occurring in the process of integration of noisy differential phase data. Further, certain exemplary embodiments can use transmission images and/or dark-field images to improve or restore phase contrast images affected by noise edges.
Claims20
A method of reconstructing an integrated image from a differential image, the method comprising:
- receiving a plurality of correlated images each containing different image information about a same scanned object, the correlated images including a differential phase image, a transmission image, and a dark field image;
- reconstructing the integrated image by combining the differential phase image with only one of either the transmission image or the dark field image;
- and
- presenting the reconstructed integrated image.
A method of reconstructing an integrated image from a differential image, the method comprising:
- receiving a plurality of correlation images, the correlation images including the differential image;
- reconstructing the integrated image using the differential image and at least another one of the correlation images;
- and
- presenting the reconstructed integrated image,
- wherein the step of reconstructing the integrated image includes determining an image that reduces an energy function, the energy function comprised of:
- i) a regularization term comprising a function of a recovered phase image and a weight matrix derived from at least one of the correlation images;
- or
- ii) a geometry matching function which aligns the geometry of the recovered phase image and at least one of the correlation images;
- or a combination thereof.
A method of retrieving a phase contrast integrated image from basis images, the method comprising:
- receiving a plurality of correlated basis images, the correlated basis images including a differential phase image, a transmission image, and a dark field image;
- reconstructing the phase contrast integrated image by combining the differential image with only the transmission image and without the dark field image;
- and
- presenting the reconstructed integrated image.
Dependencies are inferred from the claim text.