Sonic boom in soft materials: The elastic Cerenkov effect

We report an experimental evidence of an elastic sonic boom in soft materials. Our approach is based on the ultrasonic remote generation, inside soft media, of a supersonic moving source radiating shear waves in a Mach cone. In analogy with the Cerenkov electromagnetic radiation emitted by a beam of charged particles moving at a speed greater than the speed of light, an intense shear wave is radiated in soft materials. Such Mach waves are sensitive to medium elasticity inhomogeneities and are of great interest for ultrasound-based medical imaging applications.

[1]  Paul G. Richards,et al.  Quantitative Seismology: Theory and Methods , 1980 .

[2]  A. Manduca,et al.  Magnetic resonance elastography by direct visualization of propagating acoustic strain waves. , 1995, Science.

[3]  J Bercoff,et al.  In vivo breast tumor detection using transient elastography. , 2003, Ultrasound in medicine & biology.

[4]  G. Trahey,et al.  On the feasibility of remote palpation using acoustic radiation force. , 2001, The Journal of the Acoustical Society of America.

[5]  J. Greenleaf,et al.  Ultrasound-stimulated vibro-acoustic spectrography. , 1998, Science.

[6]  S. Emelianov,et al.  Shear wave elasticity imaging: a new ultrasonic technology of medical diagnostics. , 1998, Ultrasound in medicine & biology.

[7]  J.,et al.  Sound and Sources of Sound , 2005 .

[8]  S. Brown,et al.  Cerenkov radiation and its applications , 1955 .

[9]  M. Fink,et al.  Shear modulus imaging with 2-D transient elastography , 2002, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.