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Abstract #0028

A Multiphase Radial DENSE Sequence and harmonic motion based compressed sensing for fast magnetic resonance elastography

Runke Wang1, Suhao Qiu1, Zhiyong Zhang1, and Yuan Feng1
1School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China

Accelerating magnetic resonance elastography (MRE) is desired for improved patient care and image quality. In this study, we proposed a multiphase radial DENSE MRE (MRD-MRE) sequence, and a compressed sensing based reconstruction algorithm using the sparsity of harmonic motion. A spatial modulation of magnetization (SPAMM) shot was applied for motion encoding together with a radial sampling scheme for acceleration. Reconstruction accuracy was improved by utilizing the temporal sparsity of harmonic motion. Phantom and brain imaging showed that an acceleration factor up to 4 could be reached.

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