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Updated: May 31, 2026
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A Multimodal Imaging- and Stimulation-based Method of Evaluating Connectivity-related Brain Excitability in Patients with Epilepsy
Published on: November 13, 2016
Multimodality approach in cryptogenic epilepsy with focus on morphometric 3T MRI.
M T Doelken1, A Mennecke, H J Huppertz
1Department of Neuroradiology, Friedrich-Alexander-University of Erlangen-Nuremberg, Schwabachanlage 6, 91054 Erlangen, Germany. marc.doelken@uk-erlangen.de
Summary
Morphometric analysis program (MAP) shows potential for identifying epilepsy foci, despite lower sensitivity than other methods. It should be considered before further investigations for cryptogenic epilepsy.
Area of Science:
- Neuroimaging
- Epileptology
- Radiology
Background:
- Cryptogenic epilepsy diagnosis relies on identifying the epileptogenic focus.
- Conventional MRI, MEG, SPECT, and PET are used, but their effectiveness varies.
- Morphometric MRI analysis offers a novel approach to focus localization.
Purpose of the Study:
- To evaluate the utility of morphometric MRI analysis (MAP) in identifying the epileptogenic focus in cryptogenic epilepsy.
- To compare MAP's performance against established modalities like MEG, SPECT, and PET.
- To establish guidelines for MAP implementation and interpretation.
Main Methods:
- Patients with a monolobar epilepsy focus hypothesis were included.
- Feature maps from MAP were generated using MATLAB.
- A neuroradiologist interpreted MAP feature maps, blinded to conventional MRI and focus hypothesis (MAP(1)), and then with concurrent conventional MRI (MAP(2)).
Main Results:
- MAP(1) achieved 24% sensitivity and 96% specificity; MAP(2) showed 12% sensitivity and 100% specificity.
- MEG (62%) and PET (temporal 82%, extratemporal 19%) demonstrated higher sensitivity than MAP.
- PET and MEG showed the greatest concordance with the established focus hypothesis.
Conclusions:
- MAP's sensitivity is lower than other modalities, but its high specificity is notable.
- MAP should be considered as an initial diagnostic step before other investigations.
- The study provides guidance for the use and interpretation of MAP in epilepsy diagnostics.
