Low dynamic mechanical tissue stimulation for high resolution magnetic resonance elastography: An in vivo feasibility study in the liver and the brain
Florian Dittmann 1 , Sebastian Hirsch 1 , Jing Guo 1 , Jrgen Braun 2 , and Ingolf Sack 1
Institute of Radiology, Charit, Berlin,
of Medical Informatics, Charit, Berlin, Germany
We propose a MRE method utilizing shear waves induced by
continuous low frequency vibration (10 20 Hz). The
method is demonstrated for high resolution elastography
of the brain and liver, and compared to results obtained
by standard MRE frequencies from 25 to 50 Hz. Through
low attenuation of the waves, a homogenous illumination
of the tissue is achieved and high resolution
elastograms are reconstructed despite long wave lengths.
This opens the possibility to investigate tissue
behavior with low dynamic MRE e.g. for exploiting
poroelastic tissue properties.
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