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Updated: Jun 10, 2026
High-resolution In Vivo Manual Segmentation Protocol for Human Hippocampal Subfields Using 3T Magnetic Resonance Imaging
Published on: November 10, 2015
Quantitative hippocampal subfield volumetry using AID-HS in mesial temporal lobe epilepsy: correlation with
Nguyen Duy Hung1, Nguyen Thu Minh Chau2, Tran Dinh Van3
1Department of Radiology, Hanoi Medical University, Ha Noi, Viet Nam; Department of Radiology, Viet Duc Hospital, Ha Noi, Viet Nam.
Purpose:
To evaluate the diagnostic accuracy of the AID-HS pipeline in characterizing hippocampal subfield volumetric patterns and distinguishing HS subtypes, using histopathology as the reference standard in mesial temporal lobe epilepsy (mTLE).
Methods:
Thirty patients with surgically treated mTLE underwent 3.0 T MRI. Volumetric subfield analysis was performed using the automated AID-HS tool.Hippocampal subfield volumes were compared between typical HS type 1 and atypical HS, including HS types 2 and 3, with validation against the 2013 ILAE histopathological criteria. Subfields of the sclerotic hippocampus were categorized as volume-reduced or volume-preserved based on the asymmetry index.
Results:
HS type 1 was predominant, accounting for 83.3% of cases. In typical HS type 1, volume reduction in CA2 and CA3 was more frequently observed than in atypical HS on volumetric comparison, and MRI-detected volume reduction in CA2, CA3, and CA4 was significantly associated with histopathological sclerosis (p < 0.01) . Diagnostic accuracy showed fair to good classification performance for distinguishing HS subtypes, with AUC values ranging from 0.73 to 0.83. The CA3 subfield achieved the highest accuracy, with an AUC of 0.83 and 100% sensitivity.
Conclusion:
The AID-HS pipeline may provide quantitative support for subtype-oriented evaluation of HS.
Insights
The AID-HS pipeline accurately distinguishes hippocampal sclerosis (HS) subtypes in mesial temporal lobe epilepsy (mTLE) using MRI volumetric data. This tool aids in classifying HS types, with CA3 showing the highest diagnostic accuracy.
Area of Science:
- Neuroimaging
- Epilepsy research
- Histopathology
Background:
- Mesial temporal lobe epilepsy (mTLE) is often associated with hippocampal sclerosis (HS).
- Accurate classification of HS subtypes is crucial for understanding disease mechanisms and guiding treatment.
- Current diagnostic methods may have limitations in precisely characterizing HS subtypes.
Purpose of the Study:
- To assess the diagnostic accuracy of the automated AID-HS pipeline for characterizing hippocampal subfield volumes.
- To differentiate between typical HS type 1 and atypical HS (types 2 and 3) using volumetric data.
- To validate the AID-HS pipeline against histopathological criteria in mTLE patients.
Main Methods:
- Thirty mTLE patients undergoing surgery had 3.0 T MRI scans.
- The AID-HS tool performed automated volumetric subfield analysis.
- Hippocampal subfield volumes were compared between HS types, validated by 2013 ILAE histopathological criteria.
Main Results:
- HS type 1 was the most common (83.3%).
- Volume reduction in CA2 and CA3 was more frequent in typical HS type 1 compared to atypical HS.
- MRI-detected volume reduction in CA2, CA3, and CA4 correlated significantly with histopathological sclerosis (p < 0.01).
- The AID-HS pipeline demonstrated fair to good accuracy (AUC 0.73–0.83) in distinguishing HS subtypes.
- The CA3 subfield achieved the highest accuracy (AUC 0.83) with 100% sensitivity.
Conclusions:
- The AID-HS pipeline offers quantitative support for evaluating HS subtypes.
- This automated tool may enhance the diagnostic process for HS in mTLE.
- Further research can explore the clinical utility of AID-HS in epilepsy management.
