design matrix; general linear model (GLM); sparse Bayesian learning method
Abstract :
[en] Detecting the active regions of the brain during
cognitive functions is one of the important problems in cognitive
neuroscience and disorder diagnosis. One of the promising
approaches to solve this problem is to use General Linear Model
(GLM) in functional Magnetic Resonance Imaging (fMRI) data.
The main difficulty of the GLM method is to determine a flexible
design matrix to model mentioned problem appropriately. In
this paper, an approach to the critical construction of a flexible
design matrix for precise detection of active regions of the brain,
according to response in synthetic fMRI data based on GLM
is presented. Should the design matrix is accurate, the next
detection algorithm can extract a correct response from a very
low signal to noise ratio (SNR); therefore, the presented design
matrix is flexible to eschew over fitting and capture unfamiliar
slow drifts. Using a sparse Bayesian learning method, some
specific regressors are selected for flexible design matrix. Results
show clearly prominent performance of suggested algorithm
rather than conventional t-test methods and other conventional
Bayesian analysis of fMRI data.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Shahin, Safoura; Isfahan University of Technology > Department of Electrical and Computer Engineering > Digital Signal Processing Research Lab.
Shayegh, Farzaneh; Payam-Noor University > Department of Engineering
Mortaheb, Sepehr ; Isfahan University of Technology > Department of Electrical and Computer Engineering > Digital Signal Processing Research Lab.
Amirfattahi, Rassoul; Isfahan University of Technology > Department of Electrical and Computer Engineering > Digital Signal Processing Research Lab.
Language :
English
Title :
Improvement of Flexible Design Matrix in Sparse Bayesian Learning for Multi Task fMRI Data Analysis
Publication date :
November 2016
Event name :
2016 23rd Iranian Conference on Biomedical Engineering and 2016 1st International Iranian Conference on Biomedical Engineering (ICBME)
Event date :
from 23-11-2016 to 25-11-2016
Main work title :
2016 23rd Iranian Conference on Biomedical Engineering and 2016 1st International Iranian Conference on Biomedical Engineering (ICBME)
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