Contactless remote induction of shear waves in soft tissues using a transcranial magnetic stimulation device

Phys Med Biol. 2016 Mar 21;61(6):2582-93. doi: 10.1088/0031-9155/61/6/2582. Epub 2016 Mar 8.

Abstract

This study presents the first observation of shear waves induced remotely within soft tissues. It was performed through the combination of a transcranial magnetic stimulation device and a permanent magnet. A physical model based on Maxwell and Navier equations was developed. Experiments were performed on a cryogel phantom and a chicken breast sample. Using an ultrafast ultrasound scanner, shear waves of respective amplitudes of 5 and 0.5 μm were observed. Experimental and numerical results were in good agreement. This study constitutes the framework of an alternative shear wave elastography method.

MeSH terms

  • Animals
  • Chickens
  • Elasticity Imaging Techniques / instrumentation
  • Elasticity Imaging Techniques / methods*
  • High-Energy Shock Waves*
  • Humans
  • Muscle, Skeletal / diagnostic imaging
  • Phantoms, Imaging
  • Transcranial Magnetic Stimulation / instrumentation*
  • Transcranial Magnetic Stimulation / methods
  • Ultrasonics / instrumentation
  • Ultrasonics / methods*