Abstract
This study presents the first observation of elastic shear waves generated in soft solids using a dynamic electromagnetic field. The first and second experiments of this study showed that Lorentz force can induce a displacement in a soft phantom and that this displacement was detectable by an ultrasound scanner using speckle-tracking algorithms. For a 100 mT magnetic field and a 10 ms, 100 mA peak-to-peak electrical burst, the displacement reached a magnitude of . In the third experiment, we showed that Lorentz force can induce shear waves in a phantom. A physical model using electromagnetic and elasticity equations was proposed. Computer simulations were in good agreement with experimental results. The shear waves induced by Lorentz force were used in the last experiment to estimate the elasticity of a swine liver sample.
- Received 14 January 2014
DOI:https://doi.org/10.1103/PhysRevLett.113.038101
© 2014 American Physical Society
Focus
New Medical Scan Requires Less Touching
Published 18 July 2014
A medical imaging technique uses electric and magnetic fields to generate vibrations in tissues and measure their mechanical stiffness in a new way.
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