Heating of the phantom of a biological tissue by a phase conjugate ultrasonic beam
Tóm tắt
The local heating of an absorbing medium by an ultrasonic beam with a conjugate wave front has been experimentally demonstrated. Plastisol, which is a polymeric material close in acoustic properties to biological tissue, is used as the medium. An ultrasonic heating of 7.2°C has been obtained in a time of about 100 s when the sample equipped with a thermocouple is placed between a focused piezoelectric transducer emitting a “probe wave” with a frequency of 5.0 MHz and a system that reverses the ultrasonic wave front with amplification. The characteristic features of heating by ultrasonic beams with the conjugate front, as well as the prospects of applications of this effect in medicine and other fields, have been discussed.
Tài liệu tham khảo
F. V. Bunkin, D. V. Vlasov, and Yu. A. Kravtsov, Sov. J. Quantum Electron. 11, 687 (1981).
A. P. Brysev, L. M. Krutyansky, and V. L. Preobrazhensky, Phys. Usp. 41, 793 (1998).
K. B. Cunningham, M. F. Hamilton, A. P. Brysev, and L. M. Krutyansky, J. Acoust. Soc. Am. 109, 2668 (2001).
A. P. Brysev, L. M. Krutyansky, and V. L. Preobrazhensky, Bull. Russ. Acad. Sci. Phys., Suppl. Phys. Vibrat. 9(1), 52 (2001).
L. Krutyansky, P. Pernod, A. Brysev,et al., IEEE Trans. Sonics Ultrason. 49, 409 (2002).
A. P. Brysev, L. M. Krutyansky, P. Pernod, and V. L. Preobrazhensky, Acoust. Phys. 50, 623 (2004).
V. Preobrazhensky, P. Pernod, Yu. Pyl’nov, et al., Acta Acust. with Acust. 95, 36 (2009).
A. P. Brysev, R. V. Klopotov, L. M. Krutyansky, et al., Bull. Russ. Acad. Sci. Phys., Suppl. Phys. Vibrat. 10, 121 (2002).
A. P. Brysev, F. V. Bunkin, L. M. Krutyansky, et al., Acoust. Phys. 43, 207 (1997).
O. A. Sapozhnikov and T. V. Sinilo, Izv. Akad. Nauk, Ser. Fiz. 62(12), 2371 (1998).
V. B. Akopyan and Yu. A. Ershov, Principles of Interaction of Ultrasound with Biological Objects, Ed. by S. I. Shchukina (Mosc. Gos. Tekh. Univ. im. Baumana, Moscow, 2005) [in Russian].
Ultrasound in Medicine. Physical Bases and Application, Ed. by C. Hill, J. Bamber, and G. ter Haar (Wiley, New York, 2002; Fizmatlit, Moscow, 2008).