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Related Concept Videos

Brain Imaging01:14

Brain Imaging

Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).

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A Standardized Protocol for Functional Motor Mapping Using Navigated Transcranial Magnetic Stimulation
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Diffusion tensor imaging fiber tracking using navigated brain stimulation--a feasibility study.

Sandro M Krieg1, Niels H Buchmann, Jens Gempt

  • 1Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Ismaninger Strasse 22, Munich, Germany. Sandro.Krieg@lrz.tum.de

Acta Neurochirurgica
|January 25, 2012
PubMed
Summary
This summary is machine-generated.

Navigated brain stimulation (NBS)-based diffusion tensor imaging fiber tracking (DTI-FT) offers more precise corticospinal tract (CST) mapping than conventional methods. This user-independent technique enhances standardization in neurosurgery.

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Area of Science:

  • Neurosurgery
  • Medical Imaging
  • Neurology

Background:

  • Navigated brain stimulation (NBS) is an emerging technique with potential applications beyond preoperative mapping.
  • The utility of NBS in conjunction with diffusion tensor imaging fiber tracking (DTI-FT) for neurosurgical procedures remains underexplored.
  • This study investigates the comparative value of NBS-based DTI-FT versus conventional seed region definition.

Purpose of the Study:

  • To evaluate the effectiveness of NBS-guided DTI-FT in characterizing the corticospinal tract (CST) compared to traditional methods.
  • To assess the impact of NBS on the precision and reliability of DTI-FT in patients with brain tumors near the CST.

Main Methods:

  • Thirty patients with tumors adjacent to the CST underwent NBS-based motor cortex mapping using the Nexstim eXimia system.
  • Diffusion tensor imaging fiber tracking (DTI-FT) was performed by three clinicians using BrainLAB iPlan® software.
  • Key metrics including fiber count, tract volume, aberrant tracts, and tumor proximity were compared between NBS-guided and conventional DTI-FT.

Main Results:

  • Conventional DTI-FT yielded a significantly higher number of fibers (1,298 vs. 916) and tract volume (23.0 vs. 18.3 cm³).
  • A greater number of aberrant tracts were identified with conventional DTI-FT (0.6 vs. 0.3), indicating potential inaccuracies.
  • Tract proximity to the tumor did not differ significantly between methods, but conventional seed region definition showed higher inter-investigator variability.

Conclusions:

  • NBS-based DTI-FT allows for a more specific definition of the seed region, leading to more consistent and potentially more accurate CST characterization.
  • NBS-aided DTI fiber tracking is user-independent, offering a pathway toward greater standardization of DTI-FT in neurosurgical applications.
  • The findings support the integration of NBS for enhanced precision and reliability in DTI-FT for neurosurgery.