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Functional MR activation correlated with intraoperative cortical mapping
F Z Yetkin1, W M Mueller, G L Morris
1Department of Radiology, Medical College of Wisconsin, Milwaukee 53226, USA.
AJNR. American Journal of Neuroradiology
|August 1, 1997
Summary
Functional MR imaging (fMRI) shows high spatial specificity, with activation sites closely matching intraoperative mapping results. This validates fMRI
Area of Science:
- Neuroimaging
- Neurosurgery
- Functional Magnetic Resonance Imaging (fMRI)
Background:
- Accurate localization of brain function is crucial for neurosurgical planning.
- Functional Magnetic Resonance Imaging (fMRI) is a non-invasive technique used to map brain activity.
- Intraoperative electrocortical mapping provides direct, real-time functional brain mapping during surgery.
Purpose of the Study:
- To assess the spatial accuracy of functional MR imaging (fMRI).
- To compare fMRI-derived activation sites with intraoperative electrocortical mapping results.
- To validate fMRI as a tool for precise functional brain localization.
Main Methods:
- Functional MR imaging (fMRI) was conducted on 28 patients prior to awake craniotomy.
- Patients underwent fMRI and intraoperative electrocortical mapping using various motor and language paradigms.
- fMRI data and intraoperative mapping results were coregistered and analyzed for spatial correlation.
Main Results:
- A high degree of spatial correlation was observed between fMRI activation sites and intraoperative mapping.
- In 87% of cases, functional activation sites were within 10 mm of each other.
- At least 67% of intraoperative stimulation maps correlated within 10 mm of the fMRI activation site for each paradigm.
Conclusions:
- Functional MR imaging demonstrates excellent spatial specificity for the tested tasks.
- fMRI findings align well with direct intraoperative functional mapping.
- This study supports the use of fMRI for accurate pre-surgical localization of eloquent brain areas.