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Abstract #3244

Accelerated multislice MRI with patterned excitation

Jacco A de Zwart1, Peter van Gelderen1, Yicun Wang1, and Jeff H Duyn1
1Advanced MRI section, LFMI/NINDS, National Institutes of Health, Bethesda, MD, United States

Synopsis

Keywords: Pulse Sequence Design, Pulse Sequence Design, accelerated imaging; displacement imaging; diffusion imaging

Motivation: Accelerate spin echo multi-slice MRI.

Goal(s): Combine echo dephasing and rephasing segments of different slices to reduce scan time.

Approach: Use a composite RF pulse to excite upcoming slices while refocusing signal from a current slice.

Results: Implementations at 3 T for spin echo based displacement encoding and spin echo and stimulated echo based DTI show 2-3 fold acceleration.

Impact: The proposed technique can accelerate 2D multi-slice imaging techniques that rely on multiple RF pulses per slice for signal generation and acquisition. It can be combined with simultaneous multi-slice and SENSE approaches for additional acceleration.

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Keywords