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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
Published on: July 28, 2013
MRI-negative refractory partial epilepsy: role for diffusion tensor imaging in high field MRI.
Qin Chen1, Su Lui, Chun-Xiao Li
1Department of Neurology, West China Hospital of Sichuan University, Chengdu, Sichuan, China.
Epilepsy Research
|April 29, 2008
Summary
Diffusion Tensor Imaging (DTI) can identify the seizure focus in patients with difficult-to-treat epilepsy and normal MRI scans. This technique aids in pinpointing the epileptogenic zone for potential surgical evaluation.
Area of Science:
- Neuroimaging
- Epileptology
- Radiology
Background:
- Refractory partial epilepsy often presents with normal conventional MRI, complicating seizure focus localization.
- Identifying the epileptogenic zone is crucial for effective pre-surgical evaluation and treatment planning.
Purpose of the Study:
- To evaluate the utility of Diffusion Tensor Imaging (DTI) using a 3T MR scanner in identifying the epileptogenic zone in patients with MRI-negative refractory partial epilepsy.
- To compare DTI findings with electroclinical seizure localization.
Main Methods:
- Diffusion Tensor Imaging (DTI) was performed on 15 patients with refractory partial epilepsy and normal conventional MRI, along with 40 healthy controls.
- Individual maps of mean diffusivity (MD) and fractional anisotropy (FA) were calculated.
- Voxel-Based Analysis (VBA) was employed for direct comparison between patients and controls.
Main Results:
- Voxel-based analysis revealed significantly increased MD in various regions in 13 out of 15 patients.
- Electroclinical seizure localization was corroborated in 7 patients.
- Reduced FA was observed in 5 patients, with 2 showing concordance with electroclinical localization.
Conclusions:
- Diffusion Tensor Imaging (DTI) is a sensitive neuroradiologic technique for detecting epileptogenic areas in patients with MRI-negative refractory partial epilepsy.
- DTI shows promise as an adjunctive tool in the pre-surgical evaluation of these patients.
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