Discriminative Analysis of Depression Patients Studied with Structural MR Images Using Support Vector Machine and Recursive Feature Elimination

被引:3
|
作者
Wang, Jing [1 ]
Peng, Hongjun [2 ]
Zhang, Yue [3 ]
Wu, Kai [3 ,4 ,5 ]
机构
[1] Sun Yat Sen Univ, Xinhua Coll, Sch Biomed Engn, Guangzhou, Guangdong, Peoples R China
[2] Guangzhou Med Univ, Guangzhou Psychiat Hosp, Affiliated Hosp, Guangzhou, Guangdong, Peoples R China
[3] SCUT, Sch Mat Sci & Engn, Dept Biomed Engn, Guangzhou, Guangdong, Peoples R China
[4] Guangdong Engn Technol Res Ctr Translat Med Menta, Guangzhou, Guangdong, Peoples R China
[5] Guangdong Engn Technol Res Ctr Diag & Rehabil Dem, Guangzhou, Guangdong, Peoples R China
来源
SENSING AND IMAGING | 2019年 / 20卷 / 1期
基金
中国国家自然科学基金;
关键词
Depression; Region of interest; Support vector machine; Recursive feature elimination; GRAY-MATTER VOLUME; FEATURE-SELECTION; BIPOLAR DISORDER; CLASSIFICATION; ABNORMALITIES; 1ST-EPISODE; ACCURACY; NAIVE; SCALE;
D O I
10.1007/s11220-019-0242-2
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Currently, the diagnosis of depression is largely based on clinical judgments due to the absence of objective biomarkers. There are increasing evidences that depression (DP) is associated with structural abnormalities. However, the previous analyses have a poor predictive power for individuals. To discriminate DP patients from normal controls (NCs) studied with structural magnetic resonance images using the method of support vector machine (SVM) combined with recursive feature elimination (RFE). In this study, 40 DP patients and 40 age- and sex-matched NCs were recruited from Guangzhou Brain Hospital and the local community, respectively. We calculated gray matter volume (GMV) and white matter volume (WMV) of 210 cortical and 36 subcortical regions, defined by the Human Brainnetome Atlas. The group differences between DP patients and NCs were compared. The method of SVM combined with RFE was applied into the discriminative analysis of DP patients from NCs, in which discriminative features were drawn from GMV and WMV. We found that the DP patients showed significant GMV reductions in eight brain regions and showed significant WMV reductions in ten brain regions. The classifier using GMV as input features achieved the best performance (an accuracy of 86.25%, a sensitivity of 85%, and a specificity of 87.5%) in the discriminative analyses between DP patients and NCs. These findings provided evidences that specific structural brain regions associated with DP patients might qualify as a potential biomarker for disease diagnosis, and the machine-learning method of SVM with RFE may reveal neurobiological mechanisms in distinguishing DP patients from NCs.
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页数:11
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