Method and system for CT reconstruction with pre-correction
AssigneeGeneral Electric Company
InventorsZhye Yin, Jong Ye, Francis Little, Forrest Hopkins, Michael Gong, Yanfeng Du
Life of this patent
Estimating the term…
Abstract
A method for reconstructing image data from measured sinogram data acquired from a CT system is provided. The CT system is configured for industrial imaging. The method includes pre-processing the measured sinogram data. The pre-processing includes performing a beam hardening correction on the measured sinogram data and performing a detector point spread function (PSF) correction and a detector lag correction on the measured sinogram data. The pre-processed sinogram data is reconstructed to generate the image data.
Claims25
A method for reconstructing image data from measured sinogram data acquired from a Computed Tomography (CT) system, the method comprising:
- pre-processing the measured sinogram data, wherein the pre-processing comprises performing a beam hardening correction on the measured sinogram data and performing a detector point spread function (PSF) correction and a detector lag correction on the measured sinogram data;
- and
- reconstructing the pre-processed sinogram data to generate the image data,
- wherein the CT system is configured for industrial imaging.
A method for reconstructing image data from measured sinogram data acquired from a Computed Tomography (CT) system, the method comprising:
- pre-processing the sinogram data, wherein the pre-processing comprises performing a detector point spread function (PSF) correction and a detector lag correction on the measured sinogram data, and wherein the detector PSF correction and the detector lag correction comprises deconvolving the measured sinogram data along one or more detector rows and detector view directions;
- and
- reconstructing the pre-processed sinogram data to generate the image data, wherein the CT system is adapted for industrial imaging.
A computed tomography (CT) system for reconstructing image data from measured sinogram data, the computed tomography system comprising:
- an X-ray source configured to project a plurality of polychromatic X-ray beams through an object;
- a detector configured to produce a plurality of electrical signals in response to a plurality of X-ray beams received from the source;
- and
- a system controller configured to process the plurality of electrical signals to generate the measured sinogram data, wherein the system controller is further configured to pre-process the measured sinogram data to perform a beam hardening correction on the measured sinogram data, wherein the system controller is further configured to perform a detector point spread function (PSF) correction and a detector lag correction on the measured sinogram data and wherein the system controller is further configured to reconstruct the pre-processed sinogram data to generate the image data,
- wherein the CT system is adapted for industrial imaging.
Dependencies are inferred from the claim text.