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Intraoperative visualization of the pyramidal tract by diffusion-tensor-imaging-based fiber tracking
Christopher Nimsky1, Oliver Ganslandt, Dorit Merhof
1Department of Neurosurgery, University Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany. nimsky@nch.imed.uni-erlangen.de
Neuroimage
|December 21, 2005
Summary
Functional neuronavigation with diffusion tensor imaging fiber tracking enhances glioma resection near eloquent brain areas. This method reliably guided surgeons, preventing new neurological deficits in 19 patients.
Area of Science:
- Neurosurgery
- Medical Imaging
- Neuroscience
Background:
- Intraoperative visualization of critical brain structures is crucial for safe glioma resection.
- Diffusion tensor imaging (DTI) fiber tracking can delineate major white matter tracts.
Purpose of the Study:
- To integrate DTI tractography data into functional neuronavigation systems for glioma surgery.
- To assess the reliability and safety of this integrated approach in visualizing and navigating white matter tracts.
Main Methods:
- DTI-based fiber tracking data were registered with standard anatomical imaging.
- Tractography data were superimposed onto the surgical field using a neuronavigation system.
- Intraoperative high-field MRI was used to correct for brain shift up to 8 mm.
- Non-linear registration techniques identified and compensated for echo planar imaging distortions.
Main Results:
- Navigation using integrated DTI tractography was reliable despite image distortions.
- No new postoperative neurological deficits were observed in 19 patients.
- Visualization of white matter tracts facilitated safe resection of gliomas near eloquent areas.
Conclusions:
- Integrating DTI tractography into functional neuronavigation enables safer resection of gliomas adjacent to eloquent brain areas.
- Surgeons must account for potential pyramidal tract shifting after significant tumor resection.