Cheng, Wei, Ji, Xiaoxi, Zhang, Jie and Feng, Jianfeng. (2012) Individual classification of ADHD patients by integrating multiscale neuroimaging markers and advanced pattern recognition techniques. Frontiers in Systems Neuroscience, Vol.6 (No.58). ISSN 1662-5137

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Abstract

Accurate classification or prediction of the brain state across individual subject, i.e., healthy, or with brain disorders, is generally a more difficult task than merely finding group differences. The former must be approached with highly informative and sensitive biomarkers as well as effective pattern classification/feature selection approaches. In this paper, we propose a systematic methodology to discriminate attention deficit hyperactivity disorder (ADHD) patients from healthy controls on the individual level. Multiple neuroimaging markers that are proved to be sensitive features are identified, which include multiscale characteristics extracted from blood oxygenation level dependent (BOLD) signals, such as regional homogeneity (ReHo) and amplitude of low-frequency fluctuations. Functional connectivity derived from Pearson, partial, and spatial correlation is also utilized to reflect the abnormal patterns of functional integration, or, dysconnectivity syndromes in the brain. These neuroimaging markers are calculated on either voxel or regional level. Advanced feature selection approach is then designed, including a brain-wise association study (BWAS). Using identified features and proper feature integration, a support vector machine (SVM) classifier can achieve a cross-validated classification accuracy of 76.15% across individuals from a large dataset consisting of 141 healthy controls and 98 ADHD patients, with the sensitivity being 63.27% and the specificity being 85.11%. Our results show that the most discriminative features for classification are primarily associated with the frontal and cerebellar regions. The proposed methodology is expected to improve clinical diagnosis and evaluation of treatment for ADHD patient, and to have wider applications in diagnosis of general neuropsychiatric disorders.

Item Type:	Journal Article
Subjects:	Q Science > QP Physiology R Medicine > RJ Pediatrics
Divisions:	Faculty of Science > Computer Science
Library of Congress Subject Headings (LCSH):	Attention-deficit hyperactivity disorder -- Diagnosis, Brain -- Abnormalities
Journal or Publication Title:	Frontiers in Systems Neuroscience
Publisher:	Frontiers Media S.A.
ISSN:	1662-5137
Date:	2012
Volume:	Vol.6
Number:	No.58
Identification Number:	10.3389/fnsys.2012.00058
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access
Funder:	Royal Society (Great Britain), Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC)
Grant number:	61104143 (NSFC), 61004104 (NSFC)
URI:	http://wrap.warwick.ac.uk/id/eprint/49248

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