Method and apparatus for projection image generation from tomographic images
AssigneeSiemens Aktiengesellschaft
InventorsSHIRAS ABDURAHMAN, ANNA JEREBKO, MICHAEL KELM
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Abstract
A method for generating a projection image from tomographic images first captures (S101) a number of stacked two-dimensional tomographic images representing a tomographic volume. The pixels of the stacked two-dimensional tomographic images are weighted (S102) along a number of projection beams through the tomographic volume with weighting factors that are chosen under the constraint that the sum of all squared weighting factors for each individual projection beam is between a given lower limit and a given upper limit. Then the weighted pixels are summed up (S103) along the number of projection beams for generating the two-dimensional projection image.
Claims16
A method for generating a projection image from tomographic images (111), the method comprising the following steps:
- capturing (S101) a plurality of stacked two-dimensional tomographic images (111) representing a tomographic volume;
- weighting (S102) pixels of the stacked two-dimensional tomographic images (111) along a number of projection beams (109) through the tomographic volume with weighting factors chosen under a constraint that a sum of all squared weighting factors for each individual projection beam lies between a given lower limit and a given upper limit;
- and
- summing up (S103) the weighted pixels along the number of projection beams (109) for generating the two-dimensional projection image.
A tomography apparatus (100) for generating a projection image, comprising:
- an imaging device (101) for capturing a number of stacked two-dimensional tomographic images (111) representing a tomographic volume;
- a weighting device (103) for weighting pixels of the stacked two-dimensional tomographic images (111) along a number of projection beams (109) through the tomographic volume with weighting factors chosen under a constraint that a sum of all squared weighting factors for each individual projection beam lies between a given lower limit and a given upper limit;
- and
- a summing device (105) for summing up the weighted pixels along the number of projection beams (109) for generating the two-dimensional projection image.
Dependencies are inferred from the claim text.