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Inter-modality relationship constrained multi-modality multi-task feature selection for Alzheimer's Disease and mild cognitive impairment identification

Authors
Liu, FengWee, Chong-YawChen, HuafuShen, Dinggang
Issue Date
1-1월-2014
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Keywords
Alzheimer' s Disease; Mild cognitive impairment; Multi-kernel support vector machine; Multi-task feature selection; Inter-modality relationship
Citation
NEUROIMAGE, v.84, pp.466 - 475
Indexed
SCIE
SCOPUS
Journal Title
NEUROIMAGE
Volume
84
Start Page
466
End Page
475
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/99572
DOI
10.1016/j.neuroimage.2013.09.015
ISSN
1053-8119
Abstract
Previous studies have demonstrated that the use of integrated information from multi-modalities could significantly improve diagnosis of Alzheimer's Disease (AD). However, feature selection, which is one of the most important steps in classification, is typically performed separately for each modality, which ignores the potentially strong inter-modality relationship within each subject. Recent emergence of multi-task learning approach makes the joint feature selection from different modalities possible. However, joint feature selection may unfortunately overlook different yet complementary information conveyed by different modalities. We propose a novel multitask feature selection method to preserve the complementary inter-modality information. Specifically, we treat feature selection from each modality as a separate task and further impose a constraint for preserving the inter-modality relationship, besides separately enforcing the sparseness of the selected features from each modality. After feature selection, a multi-kernel support vector machine (SVM) is further used to integrate the selected features from each modality for classification. Our method is evaluated using the baseline PET and MRI images of subjects obtained from the Alzheimer's Disease Neuroimaging Initiative (ADNI) database. Our method achieves a good performance, with an accuracy of 94.37% and an area under the ROC curve (AUC) of 0.9724 for AD identification, and also an accuracy of 78.80% and an AUC of 0.8284 for mild cognitive impairment (MCI) identification. Moreover, the proposed method achieves an accuracy of 67.83% and an AUC of 0.6957 for separating between MCI converters and MCI non-converters (to AD). These performances demonstrate the superiority of the proposed method over the state-of-the-art classification methods. (C) 2013 Elsevier Inc. All rights reserved.
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