Automatic interatrial septum detection from pre-operative and intra-operative 3d medical images for accurate transseptal puncture
AssigneeSiemens Aktiengesellschaft
InventorsYefeng Zheng, Matthias John
Life of this patent
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Abstract
A computer-implemented method of determining an interatrial septum ring in a cardiac image includes determining a left atrium mean shape based on a plurality of training images and determining an interatrial septum ring mean shape based on the left atrium mean shape. A left atrium mesh is identified in a new image. Then, a deformation field from the left atrium mean shape to the left atrium mesh is calculated and applied to the interatrial septum ring mean shape to determine the interatrial septum ring in the new image.
Claims21
A computer-implemented method of determining an interatrial septum ring in a cardiac image, the method comprising:
- determining, by a computer, a left atrium mean shape based on a plurality of training images;
- determining, by the computer, an interatrial septum ring mean shape based on the left atrium mean shape;
- identifying, by the computer, a left atrium mesh in a new image;
- calculating, by the computer, a deformation field from the left atrium mean shape to the left atrium mesh;
- and
- applying, by the computer, the deformation field to the interatrial septum ring mean shape to determine the interatrial septum ring in the new image.
A method of determining an interatrial septum ring in a cardiac image, the method comprising:
- receiving, by a computer, an indication of whether a boundary associated with an interatrial septum wall is visible in an image;
- if the boundary associated with an interatrial septum wall is visible in an image, performing a first procedure comprising:
- determining, by the computer, an initial estimate of the interatrial septum wall included in the image,
- applying, by the computer, a discriminative shape model to the initial estimate of the interatrial septum wall to determine the interatrial septum ring in the image;
- and
- if the boundary associated with an interatrial septum wall is not visible in an image, performing a second procedure comprising:
- determining, by the computer, a left atrium mean shape based on a plurality of training images,
- determining, by the computer, an interatrial septum ring mean shape based on the left atrium mean shape,
- identifying, by the computer, a left atrium mesh in the image,
- calculating, by the computer, a deformation field from the left atrium mean shape to the left atrium mesh, and
- applying, by the computer, the deformation field to the interatrial septum ring mean shape to determine the interatrial septum ring in the image.
A system for determining an interatrial septum ring in a cardiac image, the system comprising:
- a database configured to store a plurality of training images;
- a receiver operably coupled to an imaging device and configured to receive a new image from the imaging device;
- and
- a processor configured to:
- determine a left atrium mean shape based on the plurality of training images,
- determine an interatrial septum ring mean shape based on the left atrium mean shape,
- identify a left atrium mesh in the new image,
- calculate a deformation field from the left atrium mean shape to the left atrium mesh, and
- apply the deformation field to the interatrial septum ring mean shape to determine the location of the interatrial septum ring in the new image.
Dependencies are inferred from the claim text.