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Abstract #1022

An Electromagnetic Actuator for Brain Magnetic Resonance Elastography

Suhao Qiu1, Zhao He1, Runke Wang1, Ruokun Li2, Fuhua Yan2, and Yuan Feng1
1the Institute for Medical Imaging Technology, Shanghai Jiao Tong University, Shanghai, China, 2the Department of Radiology, Ruijin Hospital, Shanghai, China

Effective actuators are crucial for brain magnetic resonance elastography (MRE). In this study, we designed, tested, and verified an electromagnetic actuator. With a grappler-shaped design, the actuator was easy to use and comfortable to wear on head. Phantom and brain experiments indicated that the proposed actuator did not interference with routine imaging sequences. It generated stable shear waves with a full width at half maximum of 0.3 Hz in the frequency spectrum. Phantom and brain MRE demonstrated that the actuator could carry out multi-frequency MRE with a high frequency accuracy.

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