Method and device for registering 2D projection images relative to a 3D image data record
AssigneeSiemens Aktiengesellschaft
InventorsJan Boese, Norbert Rahn
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Abstract
The invention relates to a method and a device for registering 2D projection images of an object relative to a 3D image data record of the same object, in which, from just a few 2D projection images, a 3D feature contained in an object, which is also identifiable in the 3D images, is symbolically reconstructed. The 3D feature obtained in this way is then registered by 3D-3D registration with the 3D image data record.
Claims20
A method for registering a plurality of 2D projection images of an object relative to 3D image data record of the object, comprising:
- recording the plurality of 2D projection images of the object from a plurality of projection angles;
- spatially and symbolically reconstructing a 3D model of a target structure of the object by a computing device from the 2D projection images using a model function,
- wherein the 3D model of the target structure is identifiable both in the 3D image data record and in the 2D projection images;
- and
- registering the 3D model of the target structure relative to the 3D image data record using a 3D-3D registration in which the target structure in the 3D image data record is harmonized with the 3D model of the target structure,
- wherein a relationship is established by the registration between the coordinate system of the 3D image data record and the coordinate system of the 2D projection images.
A device for registering a plurality of 2D projection images of an object relative to a 3D image data record of the object, comprising:
- an x-ray device for recording a plurality of 2D projection images of the object from a plurality of projection angles;
- a data memory for storing the 2D projection images of the object and the 3D image data record of the object;
- and
- a computing device for:
- spatially and symbolically reconstructing a 3D model of a target structure of the object from the 2D projection images using a model function that the 3D model of the target structure is identifiable both in the 3D image data record and in the 2D projection images, and
- registering the 3D model of the target structure relative to the 3D image data record using a 3D-3D registration in which the target structure in the 3D image data record is harmonized with the 3D model.
Dependencies are inferred from the claim text.