NDLI: Ultrafast imaging of beamformed shear waves induced by the acoustic radiation force. Application to transient elastography

Content Provider	IEEE Xplore Digital Library
Author	Bercoff, J. Tanter, M. Chaffai, S. Fink, M.
Copyright Year	2002
Description	Author affiliation: Lab. Ondes et Acoustique, Univ. Paris VII, France (Bercoff, J.; Tanter, M.; Chaffai, S.; Fink, M.)
Abstract	Several tissue characterization techniques based on acoustic radiation force have been proposed to remotely excite soft tissues with ultrasound. Recently, in transient elastography, an ultrafast echographic device was developed to follow the propagation inside soft tissues of very low frequency shear waves (/spl sim/100 Hz). These waves were generated using a vibrating system located at the body surface. In this paper, it is proposed to couple transient elastography and remote excitation techniques by replacing the usual external vibrating system by the use of the ultrasonic radiation force. In our experiments, the same probe allows both to generate and detect shear waves propagation by using an unusual emission-reception sequence. Our fully programmable electronics allow to induce and image, as desired, several shear sources at different times and locations in order to compute a real "shear wave beamforming" and optimize the shear source shape to the studied medium. An elasticity image of the whole medium can be recovered using only a few pushing beams (1 to 5). Measurements have been performed in several soft tissue mimicking phantom. Green's function based simulations have been used to support our experimental results.
Sponsorship	Ultransonics Ferroelectr., & Frequency Control Soc
Starting Page	1899
Ending Page	1902
File Size	1798290
Page Count	4
File Format	PDF
ISBN	0780375823
ISSN	10510117
DOI	10.1109/ULTSYM.2002.1192669
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-08
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acoustic imaging Acoustic waves Biological tissues Ultrasonic imaging Acoustic devices Acoustic propagation Frequency Surface acoustic wave devices Probes Array signal processing
Content Type	Text
Resource Type	Article

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