Artifact mitigation in x-ray imaging
OwnerDavid Uribe Gallo, Tobias Neubrandinventors
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Abstract
A first data set, characterizing multiple primary projections, and a second data set, characterizing multiple secondary projections, are received. Each primary projection includes both primary radiation and secondary radiation. Each secondary projection includes only the secondary radiation. An associated secondary projection is subtracted from each primary projection. A set of corrected images with the secondary radiation removed based on the primary projections is then provided.
Claims20
A method comprising:
- receiving a first data set characterizing a plurality of primary projections, wherein each one of the plurality of primary projections includes both primary radiation and secondary radiation;
- receiving a second data set characterizing a plurality of secondary projections, wherein each one of the plurality of secondary projections includes only secondary radiation;
- subtracting an associated secondary projection from each primary projection of the plurality of primary projections;
- and
- providing a plurality of corrected images with the secondary radiation removed in each one of the plurality of corrected images based on the plurality of primary projections.
The method of claim 1, wherein the plurality of primary projections is captured using an X-ray tube in a first operational mode, wherein the plurality of secondary projections is captured using the X-ray tube in a second operational mode.
The method of claim 3, wherein the angular interval is determined to range from 0 to 180 degrees.
The method of claim 5, wherein creating the mask comprises:
- normalizing the created secondary projection;
- and
- applying a predetermined threshold to the normalized secondary projection to determine a binary image.
The method of claim 7, wherein applying the mask to each secondary projection of the plurality of secondary projections comprises:
- applying the shifted mask to each interpolated secondary projection of the plurality of secondary projections to align the isolated ROI with the secondary radiation in the corresponding primary projection.
A system comprising:
- at least one data processor;
- and
- non-transitory memory storing instructions, which, when executed by the at least one data processor causes the at least one data processor to perform operations comprising:
- receiving a first data set characterizing a plurality of primary projections, wherein each one of the plurality of primary projections includes both primary radiation and secondary radiation;
- receiving a second data set characterizing a plurality of secondary projections, wherein each one of the plurality of secondary projections includes only secondary radiation;
- subtracting an associated secondary projection from each primary projection of the plurality of primary projections;
- and
- providing a plurality of corrected images with the secondary radiation removed in each one of the plurality of corrected images based on the plurality of primary projections.
The system of claim 11, wherein the plurality of primary projections is captured using an X-ray tube in a first operational mode, wherein the plurality of secondary projections is captured using the X-ray tube in a second operational mode.
The system of claim 13, wherein the angular interval is determined to range from 0 to 180 degrees.
The system of claim 15, wherein creating the mask comprises:
- normalizing the created secondary projection;
- and
- applying a predetermined threshold to the normalized secondary projection to determine a binary image.
The system of claim 17, wherein applying the mask to each secondary projection of the plurality of secondary projections comprises:
- applying the shifted mask to each interpolated secondary projection of the plurality of secondary projections to align the isolated ROI with the secondary radiation in the corresponding primary projection.
A non-transitory computer readable memory storing instructions which, when executed by at least one data processor forming part of at least one computing system, causes the at least one data processor to perform operations comprising:
- receiving a first data set characterizing a plurality of primary projections, wherein each one of the plurality of primary projections includes both primary radiation and secondary radiation;
- receiving a second data set characterizing a plurality of secondary projections, wherein each one of the plurality of secondary projections includes only secondary radiation;
- subtracting an associated secondary projection from each primary projection of the plurality of primary projections;
- and
- providing a plurality of corrected images with the secondary radiation removed in each one of the plurality of corrected images based on the plurality of primary projections.
Dependencies are inferred from the claim text.