Active elastography

Active elastography is not abandoned. We still pursue researches in many different areas to create shear wave in soft tissues with new approaches. It includes arrays of vibrators for time reversal elastography, electromagnetic approaches for Lorentz force elastography (see figure), laser excitation for optical elastography, bubble sources or simply radiation pressure on clinical surgical pieces. Future applications are foreseen and based on specific advantages offered by each of the present approaches.

Seismology of a single cell

Lorentz force elastography

• Stefan Catheline (DR INSERM)
• Rémi Souchon (AI)
• Ali Zorgani (Post-doc)
• Bruno Giammarinaro (Post-doc)
• Chadi Zemzemi (PhD student)
• Zhishen Sun (PhD student)

• P. Grasland-Mongrain, A. Zorgani, S. Nakagawa, S.Bernard, G. Fitzharris, S. Catheline, G. Cloutier
  Optical microelastography: ultrafast imaging of cell elasticity.
  PNAS 15 janvier 2018
• Z. Sun, G. Liu, H. Xia, S. Catheline
  Lorentz Force Electrical Impedance Tomography Using Linearly Frequency-Modulated Ultrasound Pulse.
  IEEE Transaction in UFFC (2017)
• P. Grasland-Mongrain, Y. Lu, F. Lesage, S. Catheline, G. Cloutier
  Generation of shear waves by laser in soft media in the ablative and thermoelastic regimes
  Appl. Phys. Lett., 109, 221901 (2016).
• S. Montalescot, B. Roger, A. Zorgani, R. Souchon, P. Grasland-Mongrain, R. Ben Haj Slama, J-C. Bera, S. Catheline
  Electrolysis-induced bubbling in soft solids for elastic-wave generation
  Appl. Phys. Lett. 108, 094105 (2016).
• P. Grasland-Mongrain, E. Miller-Jolicoeur, A. Tang, S. Catheline, G. Cloutier
  Contactless remote induction of shear waves in soft tissues using a transcranial magnetic stimulation device
  Phys.in Med.Biol., 61  2582–2593 (2016).