Automated subfield volumetric analysis of hippocampus in temporal lobe epilepsy using high-resolution T2-weighed MR imaging
Background and purpose: Automated subfield volumetry of hippocampus is desirable for use in temporal lobe epilepsy (TLE), but its utility has not been established. Automatic segmentation of hippocampal subfields (ASHS) and the new version of FreeSurfer software (ver.6.0) using high-resolution T2-wei...
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doaj-db4f22537bd6427588688c7825edef432020-11-24T22:52:05ZengElsevierNeuroImage: Clinical2213-15822016-01-0112C576410.1016/j.nicl.2016.06.008Automated subfield volumetric analysis of hippocampus in temporal lobe epilepsy using high-resolution T2-weighed MR imagingDaichi Sone0Noriko Sato1Norihide Maikusa2Miho Ota3Kaoru Sumida4Kota Yokoyama5Yukio Kimura6Etsuko Imabayashi7Yutaka Watanabe8Masako Watanabe9Mitsutoshi Okazaki10Teiichi Onuma11Hiroshi Matsuda12Department of Radiology, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanDepartment of Radiology, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanIntegrative Brain Imaging Center, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanIntegrative Brain Imaging Center, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanDepartment of Radiology, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanDepartment of Radiology, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanDepartment of Radiology, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanIntegrative Brain Imaging Center, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanDepartment of Psychiatry, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanDepartment of Psychiatry, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanDepartment of Psychiatry, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanMusashino-Kokubunji Clinic, 4-1-9-3, Honcho, Kokubunji, Tokyo 185-0012, JapanIntegrative Brain Imaging Center, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, JapanBackground and purpose: Automated subfield volumetry of hippocampus is desirable for use in temporal lobe epilepsy (TLE), but its utility has not been established. Automatic segmentation of hippocampal subfields (ASHS) and the new version of FreeSurfer software (ver.6.0) using high-resolution T2-weighted MR imaging are candidates for this volumetry. The aim of this study was to evaluate hippocampal subfields in TLE patients using ASHS as well as the old and new versions of FreeSurfer. Materials and methods: We recruited 50 consecutive unilateral TLE patients including 25 with hippocampal sclerosis (TLE-HS) and 25 without obvious etiology (TLE-nonHS). All patients and 45 healthy controls underwent high-resolution T2-weighted and 3D-volume T1-weighted MRI scanning. We analyzed all of their MR images by FreeSurfer ver.5.3, ver.6.0 and ASHS. For each subfield, normalized z-scores were calculated and compared among groups. Results: In TLE-HS groups, ASHS and FreeSurfer ver.6.0 revealed maximal z-scores in ipsilateral cornu ammonis (CA) 1, CA4 and dentate gyrus (DG), whereas in FreeSurfer ver.5.3 ipsilateral subiculum showed maximal z-scores. In TLE-nonHS group, there was no significant volume reduction by either ASHS or FreeSurfer. Conclusions: ASHS and the new version of FreeSurfer may have an advantage in compatibility with existing histopathological knowledge in TLE patients with HS compared to the old version of FreeSurfer (ver.5.3), although further investigations with pathological findings and/or surgical outcomes are desirable.http://www.sciencedirect.com/science/article/pii/S2213158216301061Temporal lobe epilepsyHippocampal subfieldsAutomatic segmentationMRIHippocampal sclerosis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Daichi Sone Noriko Sato Norihide Maikusa Miho Ota Kaoru Sumida Kota Yokoyama Yukio Kimura Etsuko Imabayashi Yutaka Watanabe Masako Watanabe Mitsutoshi Okazaki Teiichi Onuma Hiroshi Matsuda |
spellingShingle |
Daichi Sone Noriko Sato Norihide Maikusa Miho Ota Kaoru Sumida Kota Yokoyama Yukio Kimura Etsuko Imabayashi Yutaka Watanabe Masako Watanabe Mitsutoshi Okazaki Teiichi Onuma Hiroshi Matsuda Automated subfield volumetric analysis of hippocampus in temporal lobe epilepsy using high-resolution T2-weighed MR imaging NeuroImage: Clinical Temporal lobe epilepsy Hippocampal subfields Automatic segmentation MRI Hippocampal sclerosis |
author_facet |
Daichi Sone Noriko Sato Norihide Maikusa Miho Ota Kaoru Sumida Kota Yokoyama Yukio Kimura Etsuko Imabayashi Yutaka Watanabe Masako Watanabe Mitsutoshi Okazaki Teiichi Onuma Hiroshi Matsuda |
author_sort |
Daichi Sone |
title |
Automated subfield volumetric analysis of hippocampus in temporal lobe epilepsy using high-resolution T2-weighed MR imaging |
title_short |
Automated subfield volumetric analysis of hippocampus in temporal lobe epilepsy using high-resolution T2-weighed MR imaging |
title_full |
Automated subfield volumetric analysis of hippocampus in temporal lobe epilepsy using high-resolution T2-weighed MR imaging |
title_fullStr |
Automated subfield volumetric analysis of hippocampus in temporal lobe epilepsy using high-resolution T2-weighed MR imaging |
title_full_unstemmed |
Automated subfield volumetric analysis of hippocampus in temporal lobe epilepsy using high-resolution T2-weighed MR imaging |
title_sort |
automated subfield volumetric analysis of hippocampus in temporal lobe epilepsy using high-resolution t2-weighed mr imaging |
publisher |
Elsevier |
series |
NeuroImage: Clinical |
issn |
2213-1582 |
publishDate |
2016-01-01 |
description |
Background and purpose: Automated subfield volumetry of hippocampus is desirable for use in temporal lobe epilepsy (TLE), but its utility has not been established. Automatic segmentation of hippocampal subfields (ASHS) and the new version of FreeSurfer software (ver.6.0) using high-resolution T2-weighted MR imaging are candidates for this volumetry. The aim of this study was to evaluate hippocampal subfields in TLE patients using ASHS as well as the old and new versions of FreeSurfer.
Materials and methods: We recruited 50 consecutive unilateral TLE patients including 25 with hippocampal sclerosis (TLE-HS) and 25 without obvious etiology (TLE-nonHS). All patients and 45 healthy controls underwent high-resolution T2-weighted and 3D-volume T1-weighted MRI scanning. We analyzed all of their MR images by FreeSurfer ver.5.3, ver.6.0 and ASHS. For each subfield, normalized z-scores were calculated and compared among groups.
Results: In TLE-HS groups, ASHS and FreeSurfer ver.6.0 revealed maximal z-scores in ipsilateral cornu ammonis (CA) 1, CA4 and dentate gyrus (DG), whereas in FreeSurfer ver.5.3 ipsilateral subiculum showed maximal z-scores. In TLE-nonHS group, there was no significant volume reduction by either ASHS or FreeSurfer.
Conclusions: ASHS and the new version of FreeSurfer may have an advantage in compatibility with existing histopathological knowledge in TLE patients with HS compared to the old version of FreeSurfer (ver.5.3), although further investigations with pathological findings and/or surgical outcomes are desirable. |
topic |
Temporal lobe epilepsy Hippocampal subfields Automatic segmentation MRI Hippocampal sclerosis |
url |
http://www.sciencedirect.com/science/article/pii/S2213158216301061 |
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