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Title:Correcting the variations of bold signal due to susceptibility-induced magnetic field gradients and its application
Author(s):Ho, David
Advisor(s):Sutton, Bradley P.
Department / Program:Electrical & Computer Eng
Discipline:Electrical & Computer Engr
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Functional magnetic resonance imaging or functional MRI (fMRI)
blood oxygenation level dependent (BOLD) signal
blood oxygenation level dependent (BOLD)
Abstract:Functional magnetic resonance imaging (fMRI) using blood oxygenation level dependent (BOLD) signals is a tool that is currently used in many cognitive neuroscience studies. However, many studies do not consider susceptibility-induced magnetic field gradients. Susceptibility-induced magnetic field gradients can vary echo time, which can also vary BOLD sensitivity. In order to correct artifacts, we introduce percent signal change and calibration function. We show calibration can reduce the artifacts and can be applied in many studies such as age-related studies.
Issue Date:2012-05-22
Rights Information:Copyright 2012 David Ho
Date Available in IDEALS:2012-05-22
Date Deposited:2012-05

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