Vanderbilt University

Ingrid M Meszoely

Thomas Pheiffer

Michael I Miga

Rebekah H Conley

A method for image guided surgery includes obtaining intraoperative locations including intraoperative fiducial locations for a non-rigid structure and intraoperative rigid structure locations for associated rigid structures, estimating a gravity deformation for the non-rigid structure based on a first rigid registration for preoperative fiducial locations in a computer model relative to the intraoperative fiducial locations and a second rigid registration for the preoperative rigid structure locations for a rigid structure in the computer model with respect to the intraoperative rigid structure locations, modifying the preoperative fiducial locations using first rigid registration and the gravity deformation, determining a third rigid registration for the modified fiducial locations relative to the intraoperative fiducial locations, calculating a non-rigid transformation for the computer model using the volumetric gravity field deformation and first boundary conditions from errors in the third rigid registration, and displaying image data for the non-rigid structure modified to undergo the non-rigid transformation.

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Nashville, TN, United States of America

Ingrid M Meszoely