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  • Title: Stereopsis-guided brain shift compensation.
    Author: Sun H, Lunn KE, Farid H, Wu Z, Roberts DW, Hartov A, Paulsen KD.
    Journal: IEEE Trans Med Imaging; 2005 Aug; 24(8):1039-52. PubMed ID: 16092335.
    Abstract:
    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 three-dimensional shape of the surgical scene in near real-time. This intraoperative shape is compared with the cortical surface in the co-registered preoperative magnetic resonance (MR) volume for the estimation of the cortical motion resulting from the open cranial surgery. The estimated cortical motion is then used to guide a full brain model, which updates a preoperative MR volume. We have found that the stereo vision system is accurate to within approximately 1 mm. Based on data from two representative clinical cases, we show that stereopsis guidance improves the accuracy of brain shift compensation both at and below the cortical surface.
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