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Titolo:
Application of the parabolic equation method to medical ultrasonics
Autore:
Roux, P; Song, HC; Porter, MB; Kuperman, WA;
Indirizzi:
Univ Paris 07, CNRS, URA 1503, ESPCI,Lab Ondes & Acoust, F-75005 Paris, France Univ Paris 07 Paris France F-75005 Ondes & Acoust, F-75005 Paris, France Univ Calif San Diego, Scripps Inst Oceanog, Marine Phys Lab, La Jolla, CA 92093 USA Univ Calif San Diego La Jolla CA USA 92093 ys Lab, La Jolla, CA 92093 USA New Jersey Inst Technol, Dept Math, Newark, NJ 07102 USA New Jersey Inst Technol Newark NJ USA 07102 pt Math, Newark, NJ 07102 USA
Titolo Testata:
WAVE MOTION
fascicolo: 2, volume: 31, anno: 2000,
pagine: 181 - 196
SICI:
0165-2125(200002)31:2<181:AOTPEM>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
TIME-REVERSAL MIRROR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Roux, P Univ Paris 07, CNRS, URA 1503, ESPCI,Lab Ondes & Acoust, F-75005 Paris, France Univ Paris 07 Paris France F-75005 Acoust, F-75005 Paris, France
Citazione:
P. Roux et al., "Application of the parabolic equation method to medical ultrasonics", WAVE MOTION, 31(2), 2000, pp. 181-196

Abstract

The application of the parabolic equation (PE) method is extended to hyperthermia and imaging problems in medical ultrasonics. It is shown that the PE provides an accurate solution of the acoustic field generated by a pre-focused array through an inhomogeneous medium. To investigate hyperthermia therapy, the PE is coupled with the heat equation. Simulations provide evidence that this interaction defocuses the acoustic field and degrades the efficiency of the hyperthermia treatment, We propose a procedure to maintain the focus in the zone of interest using two arrays and phase-conjugation invariance properties. For medical imaging, an algorithm is developed to move the focal spot of a linear array in any direction using a frequency shift ina time-reversal mirror (TRM). Simulations demonstrate that the proposed algorithm can be applied to an inhomogeneous medium in the presence of an aberrating layer without the knowledge of the medium properties. (C)2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 05/07/20 alle ore 07:21:49