Higher-Order Spin-Echo Selection for Reduced FOV Diffusion Imaging of the Brainstem at 7T

Single-shot diffusion-weighted MRI of the brainstem is hampered by B0 off-resonance distortions, a problem that is emphasized at high field strength (7T). To address this problem, we implemented a reduced FOV approach by spin-echo selection using second-order shim fields for multi-slice imaging. The method allowed for effective FOV reduction and thereby for robust and SNR efficient diffusion imaging of the brain stem at high field strength.

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