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Diffusion MRI Tractography to Reduce Risks of Postoperative Neurologic Deficits: A Systematic Review and

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  • 1Department of Neurology and Neurosurgery, Faculty of Medicine, McGill University, Montreal, Quebec, Canada.

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Diffusion MRI tractography significantly reduces the risk of postoperative neurologic deficits in brain surgeries. This neuroimaging technique enhances surgical outcomes by improving white matter tract visualization, aiding neurosurgeons in avoiding critical areas.

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Area of Science:

  • Neurosurgery
  • Medical Imaging
  • Neurology

Background:

  • Diffusion MRI tractography visualizes white matter tracts but isn't standard in neurosurgery.
  • Its role in preventing postoperative neurologic deficits requires further evidence.

Purpose of the Study:

  • To evaluate if tractography-assisted surgeries reduce long-term postoperative neurologic deficits.
  • Focus on resective/ablative intracranial procedures.

Main Methods:

  • Systematic review and meta-analysis of EMBASE and PubMed (up to Dec 2024).
  • Included studies compared tractography-assisted vs. non-assisted intracranial surgeries.
  • Assessed new postoperative neurologic deficits using random-effects model.

Main Results:

  • 8 studies (629 patients) included; all involved resective surgeries.
  • Tractography incorporation reduced postoperative neurologic deficits by 55%.
  • Benefits observed with preoperative and intraoperative tractography use.

Conclusions:

  • Tractography addition lowers risk of postoperative neurologic deficits in resective intracranial surgeries.
  • Complements or serves as an alternative to direct electrical stimulation for brain mapping.