화소기반 형태분석 방법을 이용한 내측측두엽 간질환자의 회백질 부피/농도 감소평가: FDG PET과의 비교 (Voxel-based Morphometry (VBM) Based Assessment of Gray Matter Loss in Medial Temporal Lobe Epilepsy; Comparison with FDG PET) |
Author |
강혜진, 이호영, 이재성, 강은주, 이상건, 장기현, 이동수, |
Hyejin Kang, M.S., Ho-Young Lee, Jae Sung Lee, Ph.D., Eunjoo Kang, Ph.D., Sang ,Gun Lee M.D., Kee Hyun Chang, M.D., Dong Soo Lee, M.D. |
Affiliation |
서울대학교 의과대학 핵의학교실, 뇌신경과학전공, 신경과, 방사선과학교실 Departments of Nuclear Medicine, Brain and Neuroscience Major, Neurology, and Diagnostic Radiology, Seoul National University, Seoul, Korea |
Abstract |
The aims of this study were to find brain regions in which gray matter volume was reduced and
to show the capability of voxel-based morphometry (VBM) analysis for lateralizing epileptogenic zones in
medial temporal lobe epilepsy (mTLE). The findings were compared with fluorodeoxyglucose positron
emission tomography (FDG PET). Materials and Methods: MR T1-weighted images of 12 left mTLE and
11 right mTLE patients were compared with those of 37 normal controls. Images were transformed to
standard MNI space and averaged in order to create study-specific brain template. Each image was
normalized to this local template and brain tissues were segmented. Modulation VBM analysis was
performed in order to observe gray matter volume change. Gray matter was smoothed with a Gaussian
kernel. After these preprocessing, statistical analysis was performed using statistical parametric mapping
software (SPM99). FDG PET images were compared with those of 22 normal controls using SPM. Results:
Gray matter volume was significantly reduced in the left amygdala and hippocampus in left mTLE. In
addition, volume of cerebellum, anterior cingulate, and fusiform gyrus in both sides and left insula was
reduced. In right mTLE, volume was reduced significantly in right hippocampus. In contrast, FDG uptake
was decreased in broad areas of left or right temporal lobes in left TLE and right TLE, respectively.
Conclusions: Gray matter loss was found in the ipsilateral hippocampus by modulation VBM analysis in
medial temporal lobe epilepsy. This VBM analysis might be useful in lateralizing the epileptogenic zones in
medial temporal lobe epilepsy, while SPM analysis of FDG PET disclosed hypometabolic epileptogenic
zones. |
Keyword |
Medial temporal lobe epilepsy, Voxel-based morphometry, Gray matter volume loss, |
Full text Article |
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