Motion compensated cardiac valve reconstruction
AssigneeKoninklijke Philips N.V.
InventorsTanja Elss, Michael Grass, Rolf Dieter Bippus, Axel Thran
Life of this patent
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Abstract
Motion compensated reconstruction is currently not well-suited for reconstructing the valve, the valve leaflets and the neighboring vascular anatomy of the heart. Blurring of the valve and the valve leaflets occurs. This may lead to wrong diagnosis. A new approach for motion compensated reconstruction of the valve and the related anatomy is presented in which an edge-enhancing step is performed to suppress blurring.
Claims14
A method for reconstructing an image of an object of interest from a plurality of projection data of said object corresponding to a plurality of time points, the method comprising:
- retrieving a plurality of volumetric data of the object of interest from the plurality of projection data, each one of the volumetric data corresponding to a respective time point;
- applying a gradient-based filter on the plurality of volumetric data to obtain a plurality of edge-enhanced image volumes corresponding to the respective time points;
- weighting of the plurality of edge-enhanced image volumes by weighting edges with a normalized gradient magnitude to obtain a plurality of normalized edge-enhanced image volumes;
- estimating a plurality of first motion vector fields on the basis of the normalized plurality of edge-enhanced image volumes;
- and
- reconstructing a plurality of first motion compensated image volumes of the object from the plurality of projection data using the estimated plurality of first motion vector fields, each of the plurality of first motion compensated image volumes corresponding to a respective time point.
An image processing device for reconstructing an image of an object of interest from a plurality of projection data of said object corresponding to a plurality of time points, comprising:
- a memory configured to store a plurality of volumetric data of the object of interest retrieved from the plurality of projection data, each one of the volumetric data corresponding to a respective time point;
- at least one processor configured to:
- apply a gradient-based filter on the plurality of volumetric data to obtain a plurality of edge-enhanced image volumes corresponding to the respective time points;
- estimate a plurality of first motion vector fields based on a plurality of normalized edge-enhanced image volumes obtained by weighting the plurality of edge-enhanced image volumes by weighting edges with a normalized gradient magnitude;
- and
- reconstruct a plurality of first motion compensated image volumes of the object from the plurality of projection data using the estimated plurality of first motion vector fields, each of the plurality of first motion compensated image volumes corresponding to a respective time point.
A non-transitory computer-readable medium having one or more executable instructions stored thereon which, when executed by at least one processor, cause the at least one processor to perform a method for reconstructing an image of an object of interest from a plurality of projection data of said object corresponding to a plurality of time points, the method comprising:
- retrieving a plurality of volumetric data of the object of interest from the plurality of projection data, each one of the volumetric data corresponding to a respective time point;
- applying a gradient-based filter on the plurality of volumetric data to obtain a plurality of edge-enhanced image volumes corresponding to the respective time points;
- weighting the plurality of edge-enhanced image volumes by weighting edges with a normalized gradient magnitude to obtain a plurality of normalized edge-enhanced image volumes;
- estimating a plurality of first motion vector fields on the basis of the normalized plurality of edge-enhanced image volumes;
- and
- reconstructing a plurality of first motion compensated image volumes of the object from the plurality of projection data using the estimated plurality of first motion vector fields, each of the plurality of first motion compensated image volumes corresponding to a respective time point.
Dependencies are inferred from the claim text.