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Abstract #3453

Accelerated Three-Dimensional Z-Shimming for FMRI

Jung-Jiin Hsu1, Gary H. Glover2

1Department of Radiology, University of Miami School of Medicine, Miami, FL, United States; 2Lucas Center for Imaging, Stanford University, Stanford, CA, United States

Z-shimming is an effective method to mitigate the signal loss caused by through-slice magnetic field inhomogeneity and is conventionally implemented by two-dimensional imaging. When z-shimming is implemented with three-dimensional imaging, more z-shims are available to reconstruct images of higher quality. In this work, we show that accelerated three-dimensional z-shimming by partial k-space acquisition can significantly increase the number of available z-shims and improve temporal resolution for fMRI without activation detectablility being compromised.