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Abstract #5143

Vibration Exposure in Brain MR Elastography

Safoura Sadegh Pour Aji Bishe1,2, Kay Pepin1,2, Jeremiah Heilman1,2, Xiang Shan1, Ziying Yin1, and Richard Ehman1
1Radiology, Mayo Clinic, Rochester, MN, United States, 2Resoundant, Inc., Rochester, MN, United States

Synopsis

Keywords: Safety, Brain, ElastographyMagnetic resonance elastography (MRE) requires application of mechanical vibrations to assess the stiffness of tissue noninvasively and quantitatively. This study assessed the levels of vibration exposure in brain tissue during a typical brain MRE exams performed for clinical research. Voxel-level vibration exposure levels throughout the brain were measured in 45 subjects in this IRB approved study. Histograms of voxel-level vibration in all cases demonstrated maximum exposure levels that were well below the very conservative EU 2002 Directive 2002/44/EC of the European Parliament guideline for total body vibration.

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