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Multi-threshold White Matter Structural Networks Fusion for Accurate Diagnosis of Tourette Syndrome Children

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机构: [1]Chinese Acad Sci, Inst Automat, Res Ctr Brain Inspired Intelligence, Beijing 100190, Peoples R China; [2]Univ Chinese Acad Sci, Beijing, Peoples R China; [3]Chinese Acad Sci, Ctr Excellence Brain Sci & Intelligence Technol, Beijing, Peoples R China; [4]Capital Med Univ, Beijing Childrens Hosp, Dept Radiol, 56 Nanlishi Rd, Beijing 100045, Peoples R China; [5]Minjiang Univ, Fujian Prov Key Lab Informat Proc & Intelligent C, Fuzhou 350121, Fujian, Peoples R China; [6]Capital Med Univ, Beijing Childrens Hosp, Dept Neurol, Beijing, Peoples R China
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关键词: Tourette syndrome Diffusion MRI Probabilistic tractography Structural connectivity Graph theoretical analysis Similarity Network Fusion Support vector machine

摘要:
Tourette syndrome (TS) is a childhood-onset neurobehavioral disorder. To date, TS is still misdiagnosed due to its varied presentation and lacking of obvious clinical symptoms. Therefore, studies of objective imaging biomarkers are of great importance for early TS diagnosis. As tic generation has been linked to disturbed structural networks, and many efforts have been made recently to investigate brain functional or structural networks using machine learning methods, for the purpose of disease diagnosis. However, few studies were related to TS and some drawbacks still existed in them. Therefore, we propose a novel classification framework integrating a multi-threshold strategy and a network fusion scheme to address the preexisting drawbacks. Here we used diffusion MRI probabilistic tractography to construct the structural networks of 44 TS children and 48 healthy children. We ameliorated the similarity network fusion algorithm specially to fuse the multi-threshold structural networks. Graph theoretical analysis was then implemented, and nodal degree, nodal efficiency and nodal betweenness centrality were selected as features. Finally, support vector machine recursive feature extraction (SVM-RFE) algorithm was used for feature selection, and then optimal features are fed into SVM to automatically discriminate TS children from controls. We achieved a high accuracy of 89.13% evaluated by a nested cross validation, demonstrated the superior performance of our framework over other comparison methods. The involved discriminative regions for classification primarily located in the basal ganglia and frontal cortico-cortical networks, all highly related to the pathology of TS. Together, our study may provide potential neuroimaging biomarkers for early-stage TS diagnosis.

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第一作者机构: [1]Chinese Acad Sci, Inst Automat, Res Ctr Brain Inspired Intelligence, Beijing 100190, Peoples R China; [2]Univ Chinese Acad Sci, Beijing, Peoples R China;
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通讯机构: [1]Chinese Acad Sci, Inst Automat, Res Ctr Brain Inspired Intelligence, Beijing 100190, Peoples R China; [2]Univ Chinese Acad Sci, Beijing, Peoples R China; [3]Chinese Acad Sci, Ctr Excellence Brain Sci & Intelligence Technol, Beijing, Peoples R China; [4]Capital Med Univ, Beijing Childrens Hosp, Dept Radiol, 56 Nanlishi Rd, Beijing 100045, Peoples R China;
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