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Abstract #3773

Comparing correlation between BOLD and susceptibility changes during Resting state and Task-based experiments

Sagar Buch1, Hacene Serrai1, and Ravi S Menon1,2

1Centre for Functional and Metabolic Mapping, Western University, London, ON, Canada, 2Medical Biophysics, Western University, London, ON, Canada

Quantitative susceptibility mapping (QSM) is a technique widely used for the measurement of venous oxygen saturation levels, through local deoxyhemoglobin concentration. In this work, QSM is used to explore the relationship between magnetic susceptibility and BOLD signal changes during resting state and task based fMRI experiments, in order to better understand their cerebrovascular mechanisms. Negative correlations between susceptibility and BOLD signal were observed and evaluated for both resting state and task based experiments.

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