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Abstract #3665

Susceptibility Mapping of the Dural Sinuses and Other Major Veins in the Brain

Sagar Buch1, Yongsheng Chen2, and E. Mark Haacke1,2

1The MRI Institute for Biomedical Research, Waterloo, ON, Canada, 2Department of Radiology, Wayne State University, Detroit, MI, United States

In QSM, every effort is made to reduce background field induced by the air-tissue interfaces. In this abstract, we propose a method to: correct the phase of boundary regions by using background field extrapolation methods such as Taylor expansion; preserve the internal phase for the superior sagittal sinus (SSS) and transverse sinuses using an arterial-venous (MRAV) image; and predict the phase outside the brain and SSS using forward modeling. Further, we combine these steps to obtain an estimate of the venous oxygen saturation levels inside dural sinuses.

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