Hippocampus shape analysis for temporal lobe epilepsy detection in magnetic resonance imaging

Zohreh Kohan; Reza Azmi

doi:10.1117/12.2216936

29 March 2016 Hippocampus shape analysis for temporal lobe epilepsy detection in magnetic resonance imaging

Zohreh Kohan, Reza Azmi

Author Affiliations +

Proceedings Volume 9788, Medical Imaging 2016: Biomedical Applications in Molecular, Structural, and Functional Imaging; 97882T (2016) https://doi.org/10.1117/12.2216936
Event: SPIE Medical Imaging, 2016, San Diego, California, United States

Abstract

There are evidences in the literature that Temporal Lobe Epilepsy (TLE) causes some lateralized atrophy and deformation on hippocampus and other substructures of the brain. Magnetic Resonance Imaging (MRI), due to high-contrast soft tissue imaging, is one of the most popular imaging modalities being used in TLE diagnosis and treatment procedures. Using an algorithm to help clinicians for better and more effective shape deformations analysis could improve the diagnosis and treatment of the disease. In this project our purpose is to design, implement and test a classification algorithm for MRIs based on hippocampal asymmetry detection using shape and size-based features. Our method consisted of two main parts; (1) shape feature extraction, and (2) image classification. We tested 11 different shape and size features and selected four of them that detect the asymmetry in hippocampus significantly in a randomly selected subset of the dataset. Then, we employed a support vector machine (SVM) classifier to classify the remaining images of the dataset to normal and epileptic images using our selected features. The dataset contains 25 patient images in which 12 cases were used as a training set and the rest 13 cases for testing the performance of classifier. We measured accuracy, specificity and sensitivity of, respectively, 76%, 100%, and 70% for our algorithm. The preliminary results show that using shape and size features for detecting hippocampal asymmetry could be helpful in TLE diagnosis in MRI.

Citation Download Citation

Zohreh Kohan and Reza Azmi "Hippocampus shape analysis for temporal lobe epilepsy detection in magnetic resonance imaging", Proc. SPIE 9788, Medical Imaging 2016: Biomedical Applications in Molecular, Structural, and Functional Imaging, 97882T (29 March 2016); https://doi.org/10.1117/12.2216936

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