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Abstract #3382

Prescan Phase Correction for Off-Isocenter 3D FSE Imaging

Kristin L. Granlund1, 2, Weitian Chen3, Dawei Gui4, Donglai Huo4, Patrick LeRoux5, Yuval Zur6

1Radiology, Stanford University, Stanford, CA, United States; 2Electrical Engineering, Stanford University, Stanford, CA, United States; 3Applied Science Laboratory, GE Healthcare, Menlo Park, CA, United States; 4MR PSD and Applications, GE Healthcare, Waukesha, WI, United States; 5Applied Science Laboratory, GE Healthcare, Europe; 6GE Healthcare, Israel

The use of 3D FSE sequences is limited off-isocenter due to gradient non-idealities, such as gradient-induced eddy currents. By measuring the errors during prescan, we are able to adjust the imaging gradients to improve image quality. We use a phase cycling approach to measure the phase error due to the readout gradients and a z phase encoding approach to measure the phase error due to the slice encoding gradients. The correction removes banding artifacts for off-isocenter 3D FSE acquisitions in short prescan times.

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Keywords

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