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Presurgical mapping with magnetic source imaging: comparisons with intraoperative findings

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Abstract

We compare noninvasive preoperative mapping with magnetic source imaging to intraoperative cortical stimulation mapping. These techniques were directly compared in 17 patients who underwent preoperative and postoperative somatosensory mapping of a total of 22 comparable anatomic sites (digits, face). Our findings are presented in the context of previous studies that used magnetic source imaging and functional magnetic resonance imaging as noninvasive surrogates of intraoperative mapping for the identification of sensorimotor and language-specific brain functional centers in patients with brain tumors. We found that magnetic source imaging results were reasonably concordant with intraoperative mapping findings in over 90% of cases, and that concordance could be defined as “good” in 77% of cases. Magnetic source imaging therefore provides a viable, if coarse, identification of somatosensory areas and, consequently, can guide and reduce the time taken for intraoperative mapping procedures.

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Authors and Affiliations

  1. Biomagnetic Imaging Laboratory, Department of Radiology, University of California, San Francisco, 513 Parnassus Ave, Box 0628, 94143, San Francisco, CA, USA

    Timothy P. L. Roberts, Paul Ferrari & Howard A. Rowley

  2. Department of Neurological Surgery, University of California San Franciso, 94143-0350, San Francisco, CA, USA

    David Perry & Mitchel S. Berger

Authors
  1. Timothy P. L. Roberts
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  2. Paul Ferrari
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  3. David Perry
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  4. Howard A. Rowley
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  5. Mitchel S. Berger
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Correspondence to Timothy P. L. Roberts.

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Roberts, T.P.L., Ferrari, P., Perry, D. et al. Presurgical mapping with magnetic source imaging: comparisons with intraoperative findings. Brain Tumor Pathol 17, 57–64 (2000). https://doi.org/10.1007/BF02482736

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  • DOI: https://doi.org/10.1007/BF02482736

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