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oai:www.ideals.illinois.edu:2142/30917 2023-07-10 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Sutton, Bradley P. Ho, David 2012-05-22T00:15:01Z 2012-05-22T00:15:01Z 2012-05 2012-05-22T00:15:01Z 2012-05 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. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2012-04-21T15:30:05Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 HO_DAVID.pdf: 490620 bytes, checksum: e4404ee810df3afe80ae3a149a92d845 (MD5) Made available in DSpace on 2012-05-22T00:15:01Z (GMT). No. of bitstreams: 2 HO_DAVID.pdf: 490620 bytes, checksum: e4404ee810df3afe80ae3a149a92d845 (MD5) license.txt: 4058 bytes, checksum: 9c2b089148367ad5bf02ac05ccfaca3c (MD5) http://hdl.handle.net/2142/30917 en Copyright 2012 David Ho Functional magnetic resonance imaging or functional MRI (fMRI) blood oxygenation level dependent (BOLD) signal susceptibility blood oxygenation level dependent (BOLD) Correcting the variations of bold signal due to susceptibility-induced magnetic field gradients and its application text Electrical & Computer Eng 1933 Electrical & Computer Engr 1200 University of Illinois at Urbana-Champaign Thesis M.S. MS:Electr & Computer Eng-UIUC 10KS1200MS