Apparatus and methods of compensating for organ deformation,...

A - Human Necessities – 61 – B

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A61B 19/00 (2006.01) G06T 5/00 (2006.01) G06T 7/00 (2006.01) G06T 17/20 (2006.01) A61B 5/055 (2006.01) A61B 6/02 (2006.01)

Patent

CA 2670261

A method and system of compensation for intra-operative organ shift of a living subject usable in image guide surgery. In one embodiment, the method includes the steps of generating a first geometric surface of the organ of the living subject from intra- operatively acquired images of the organ of the living subject, constructing an atlas of organ deformations of the living subject from pre-operatively acquired organ images from the pre-operatively acquired organ images, generating a second geometric surface of the organ from the atlas of organ deformations, aligning the second geometric surface of the organ to the first geometric surface of the organ of the living subject to determine at least one difference between a point of the first geometric surface and a corresponding point of the second geometric surface of the organ of the living subject, which is related to organ shift, and compensating for the intra-operative organ shift.

L'invention concerne un procédé et un système de compensation de déformation peropératoire d'un organe d'un sujet vivant utilisable en chirurgie guidée par l'image. Dans un mode de réalisation, le procédé comprend les étapes consistant à générer une première surface géométrique de l'organe du sujet vivant à partir d'images acquises de façon peropératoire de l'organe du sujet vivant, à construire un atlas de déformations d'organe du sujet vivant à partir d'images acquises de façon préopératoire à partir des images d'organes acquises de façon peropératoire, à générer une seconde surface géométrique de l'organe à partir de l'atlas de déformations d'organe, à aligner la seconde surface géométrique de l'organe sur la première surface géométrique de l'organe du sujet vivant afin de déterminer au moins une différence entre un point de la première surface géométrique et un point correspondant de la seconde surface géométrique de l'organe du sujet vivant, qui est associée à une déformation d'organe, et à compenser la déformation péropératoire de l'organe.

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