Abstract #0032

Preconditioned QSM to Determine a Large Range of Susceptibility Over The Entire Field Of View from Total Field

Zhe Liu¹, Youngwook Kee², Dong Zhou², Pascal Spincemaille², and Yi Wang^1,2

¹Biomedical Engineering, Cornell University, Ithaca, NY, United States, ²Radiology, Weill Cornell Medical College, New York, NY, United States

We propose a Preconditioned QSM calculating susceptibility over the entire field of view (FOV), which eliminates the errors associated with background field removal. The background is regarded as part of the region with large susceptibilities, which is determined by a preconditioned conjugate gradient solver with enhanced convergence. Our data demonstrate that our preconditioned QSM provides a susceptibility map of the entire head accurately depicting skin, bone, air filled sinuses and hemorrhages.

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