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Abstract #3937

Time variant cardiac noise correction in resting state fMRI without physiologic noise measures

Wanyong Shin1 and Mark J Lowe1

1Radiology, Cleveland Clinic, Cleveland, OH, United States

The cardiac and respiratory response functions derived from RETROICOR have substantial variation. We found the cardiac response function is phase, or time shifted across the brain while the respiratory function has a fixed phase, but changes polarity across the brain. Based on this finding, we propose a cardiac and respiratory noise correction method in rsfMRI data without external cardiac and respiratory fluctuation measures, and compare its performance to the RETROICOR model.

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