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Abstract #4205

Concomitant Field Compensation Improves Quality of Clinical Fast Spin Echo Images Acquired on an Asymmetric MRI Gradient System

Shengzhen Tao1, John Huston III1, Erin Gray1, Joshua Trzasko1, Myung-Ho In1, Yunhong Shu1, and Matt Bernstein1

1Radiology, Mayo Clinic, Rochester, MN, United States

The fast-spin-echo (FSE) acquisitions are the workhorse for routine MRI, but can be affected by concomitant field (CF)-induced phase errors. Recently, a compact 3T (C3T) MRI platform equipped with an asymmetric, high-performance gradient was developed. The asymmetric design of this gradient induces zeroth/first-order CFs (in addition to the second-order CF on conventional whole-body gradients), which can degrade image quality of FSE acquisitions. We have previously developed real-time gradient pre-emphasis and frequency shifting techniques to compensate for these additional CFs. Here, we demonstrate that these compensations significantly improve image quality of FSE using a clinical T2w-FSE protocol and a preliminary dataset.

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