Method for processing tomosynthesis acquisitions in order to obtain a representation of the contents of an organ
First Claim
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1. A method of processing tomosynthesis images of an object of interest, using an imaging system, the imaging system comprising an X-ray source positioned facing a detector on which the object of interest is positioned, the processing comprising the following steps:
- acquiring a plurality of 2D projection images of the object of interest according to a plurality of orientations located with respect to a perpendicular to the detector, a zero orientation being the closest to the perpendicular;
applying a filter on the acquired 2D projection images so as to obtain filtered projection images of the object of interest;
reconstructing slices of the object of interest from at least two of the filtered projection images, the reconstructed slices being a filtered reconstructed volume of the object of interest;
reprojecting the reconstructed slices according to a determined orientation direction to obtain an intermediate 2D image of the object of interest; and
using a pixel-to-pixel linear combination of the intermediate 2D image obtained by the reprojection and at least one of the acquired plurality of 2D projection images corresponding to the determined orientation to obtain a final 2D image of the object of interest.
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Abstract
A method for processing tomosynthesis images of an object of interest, using an imaging system, the imaging system comprising an X-ray source positioned facing a detector on which the object of interest is positioned. With the method of an embodiment of the invention, it is possible to display a three-dimensional (3D) reconstruction slice, as well as a two-dimensional (2D) image of the object of interest.
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Citations
17 Claims
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1. A method of processing tomosynthesis images of an object of interest, using an imaging system, the imaging system comprising an X-ray source positioned facing a detector on which the object of interest is positioned, the processing comprising the following steps:
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acquiring a plurality of 2D projection images of the object of interest according to a plurality of orientations located with respect to a perpendicular to the detector, a zero orientation being the closest to the perpendicular; applying a filter on the acquired 2D projection images so as to obtain filtered projection images of the object of interest; reconstructing slices of the object of interest from at least two of the filtered projection images, the reconstructed slices being a filtered reconstructed volume of the object of interest; reprojecting the reconstructed slices according to a determined orientation direction to obtain an intermediate 2D image of the object of interest; and using a pixel-to-pixel linear combination of the intermediate 2D image obtained by the reprojection and at least one of the acquired plurality of 2D projection images corresponding to the determined orientation to obtain a final 2D image of the object of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of displaying radiography images of an object of interest using a display unit and a processing unit comprising:
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displaying a final 2D image; selecting a pixel from the final 2D image, wherein the final 2D image is obtained from the combination of a 2D projection acquired in a determined orientation and a reprojection of reconstructed slices in the corresponding determined orientation; searching among a depth information for an identifier of a reconstructed slice associated with the selected pixel; adjusting the size of the identified reconstructed slice to be the same size as the displayed final 2D image; and displaying the adjusted reconstructed slice. - View Dependent Claims (17)
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Specification