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Abstract #2133

Water/Fat Separation and Off-Resonance Correction for 3T Spiral Breast Imaging

Kristin L. Granlund1,2, Bruce L. Daniel1, Brian A. Hargreaves1

1Radiology, Stanford University, Stanford, CA, USA; 2Electrical Engineering, Stanford University, Stanford, CA, USA

Spiral imaging is plagued by blurring due to field inhomogenity and susceptibility differences. Off-resonance correction improves water/fat separation because the phase is dependent on the relative phases of fat and water. Water/fat separation in the presence of B0-inhomogeneity is especially problematic in breast imaging, where the glandular tissue of interest is surrounded by fat and the geometry causes severe field variations. We compare three different methods of estimating the field map using a least-squares method and present the results of multi-frequency reconstruction for 3T spiral breast imaging.