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Abstract #0952

Further accelerating spin-echo EPI through combined patterned multislice excitation and SMS acquisition

Jiazheng Zhou1, Peter van Gelderen1, Jacco A. de Zwart1, Yicun Wang1, and Jeff H. Duyn1
1AMRI, LFMI, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States

Synopsis

Keywords: New Signal Preparation Schemes, Pulse Sequence Design, SMS, PME, Diffusion

Motivation: Both the recently introduced patterned multislice excitation (PME) technique and SMS acquisition can be used for faster imaging. Combining these would reduce imaging times further.

Goal(s): To demonstrate that the PME is compatible with SMS imaging.

Approach: Four RF pulses were combined to achieve acceleration from both SMS and PME. To limit peak RF amplitude, pulse components were time-shifted. The approach was demonstrated using diffusion weighted (DW) imaging at 3T.

Results: Close to fourfold acceleration was successfully implemented by combining twofold SMS and PME and evaluated for DW MRI performance versus twofold acceleration based on PME only.

Impact: Recently introduced PME approach and SMS can be combined to accelerate the acquisition.

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