Correcting the variations of bold signal due to susceptibility-induced magnetic field gradients and its application

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.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2012

Author dc:creator

• Ho, David

Contributors dc:contributor

• Sutton, Bradley P.

• Functional magnetic resonance imaging or functional MRI (fMRI)
• blood oxygenation level dependent (BOLD) signal
• susceptibility
• blood oxygenation level dependent (BOLD)

Statement dc:rights

• Copyright 2012 David Ho

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/30917

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/30917