A multi-purpose electromagnetic actuator for magnetic resonance elastography

Yuan Feng; Mo Zhu; Suhao Qiu; Ping Shen; Shengyuan Ma; Xuefeng Zhao; Chun-Hong Hu; Liang Guo

doi:10.1016/j.mri.2018.04.008

A multi-purpose electromagnetic actuator for magnetic resonance elastography

Magn Reson Imaging. 2018 Sep:51:29-34. doi: 10.1016/j.mri.2018.04.008. Epub 2018 Apr 19.

Authors

Yuan Feng¹, Mo Zhu², Suhao Qiu³, Ping Shen², Shengyuan Ma⁴, Xuefeng Zhao⁴, Chun-Hong Hu², Liang Guo²

Affiliations

¹ Institute for Medical Imaging Technology, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Center for Molecular Imaging and Nuclear Medicine, School of Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, Jiangsu 215123, China. Electronic address: fengyuan@sjtu.edu.cn.
² Department of Radiology, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou 215006, China.
³ Institute for Medical Imaging Technology, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Center for Molecular Imaging and Nuclear Medicine, School of Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, Jiangsu 215123, China.
⁴ Center for Molecular Imaging and Nuclear Medicine, School of Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, Jiangsu 215123, China.

PMID: 29679635
DOI: 10.1016/j.mri.2018.04.008

Abstract

An electromagnetic actuator was designed for magnetic resonance elastography (MRE). The actuator is unique in that it is simple, portable, and capable of brain, abdomen, and phantom imagings. A custom-built control unit was used for controlling the vibration frequency and synchronizing the trigger signals. An actuation unit was built and mounted on the specifically designed clamp and holders for different imaging applications. MRE experiments with respect to gel phantoms, brain, and liver showed that the actuator could produce stable and consistent mechanical waves. Estimated shear modulus using local frequency estimate method demonstrated that the measurement results were in line with that from MRE studies using different actuation systems. The relatively easy setup procedure and simple design indicated that the actuator system had the potential to be applied in many different clinical studies.

Keywords: Brain; Clinical applications; Electromagnetic; Liver; MR elastography.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Abdomen / diagnostic imaging
Animals
Brain / diagnostic imaging
Elasticity Imaging Techniques / instrumentation*
Elasticity Imaging Techniques / methods
Equipment Design
Humans
Imaging, Three-Dimensional / instrumentation*
Liver / diagnostic imaging
Magnetic Resonance Imaging / instrumentation*
Phantoms, Imaging
Sensitivity and Specificity
Swine
Vibration