Voxel selection in FMRI data analysis based on sparse representation

IEEE Transactions on Bio-medical Engineering
Yuanqing LiZhenghui Gu

Abstract

Multivariate pattern analysis approaches toward detection of brain regions from fMRI data have been gaining attention recently. In this study, we introduce an iterative sparse-representation-based algorithm for detection of voxels in functional MRI (fMRI) data with task relevant information. In each iteration of the algorithm, a linear programming problem is solved and a sparse weight vector is subsequently obtained. The final weight vector is the mean of those obtained in all iterations. The characteristics of our algorithm are as follows: 1) the weight vector (output) is sparse; 2) the magnitude of each entry of the weight vector represents the significance of its corresponding variable or feature in a classification or regression problem; and 3) due to the convergence of this algorithm, a stable weight vector is obtained. To demonstrate the validity of our algorithm and illustrate its application, we apply the algorithm to the Pittsburgh Brain Activity Interpretation Competition 2007 functional fMRI dataset for selecting the voxels, which are the most relevant to the tasks of the subjects. Based on this dataset, the aforementioned characteristics of our algorithm are analyzed, and a comparison between our method with the uni...Continue Reading

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Citations

Feb 11, 2015·NeuroImage·Janne KauttonenPia Tikka
Dec 10, 2015·Brain Imaging and Behavior·Bao GeTianming Liu
Apr 4, 2015·IEEE Transactions on Medical Imaging·Shijie ZhaoTianming Liu
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Feb 9, 2013·IEEE Transactions on Bio-medical Engineering·Orla M DoyleVanessa Díaz-Zuccarini
Nov 25, 2014·IEEE Transactions on Bio-medical Engineering·Jinglei LvTianming Liu
Sep 13, 2012·IEEE Transactions on Bio-medical Engineering·Shutao LiLeyuan Fang
Nov 4, 2011·IEEE Transactions on Bio-medical Engineering·Shutao LiHaitao Yin
Jan 11, 2011·IEEE Transactions on Bio-medical Engineering·Vangelis P OikonomouLoukas Astrakas
Jun 17, 2010·IEEE Transactions on Neural Networks·Yuanqing Li, Shun-Ichi Amari
Jul 8, 2011·IEEE Transactions on Neural Networks·Vanessa Gómez-VerdejoHarold Molina-Bulla
Sep 15, 2014·Journal of Neuroscience Methods·Dongdong LinYu-Ping Wang
Apr 7, 2017·Biomedizinische Technik. Biomedical Engineering·Savita V Raut, Dinkar M Yadav
Aug 11, 2017·IEEE Transactions on Bio-medical Engineering·Junhui GongJuanxiu Tian
Sep 8, 2012·Journal of Neural Engineering·Ariel TankusShy Shoham
Aug 28, 2019·Australasian Physical & Engineering Sciences in Medicine·Seyedeh Naghmeh Miri AshtianiMasoud Mehrpour
Jun 11, 2017·Brain Imaging and Behavior·Qinghua ZhaoTianming Liu
Mar 7, 2017·Frontiers in Neuroscience·Regina J MeszlényiZoltán Vidnyánszky
Nov 2, 2017·Frontiers in Neuroinformatics·Regina J MeszlényiZoltán Vidnyánszky

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