Zhe Liu1, Youngwook Kee2, Dong Zhou2, Pascal Spincemaille2, and Yi Wang1,2
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.