Stereopsis-Guided Brain Shift Compensation

H. Sun, K.E. Lunn, H. Farid, Z. Wu, D.W. Roberts, A. Hartov, and K.D. Paulsen

IEEE Transactions on Medical Imaging, 24(8):1039-1052, 2005

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Brain deformation models have proven to be a powerful tool in compensating for soft tissue deformation during image-guided neurosurgery. The accuracy of these models can be improved by incorporating intraoperative measurements of brain motion. We have designed and implemented a passive intraoperative stereo vision system capable of estimating the 3-D shape of the surgical scene in near real-time. The motion of the estimated cortical surface is then tracked over time. The cortical motion is then used to guide a full brain model, which is then used to update a preoperative MR volume. We show how this system improves the accuracy of brain shift compensation at both the cortical surface and sub-surface regions.