Effect of matching layer on acoustic lens on suppressing lamb wave formation

Jun Kubota; Takashi Azuma; Kazunari Ishida; Megumi Motoyama; Yutaka Sato; Kazuaki Sasaki; Ken Ichi Kawabata; Narendra T. Sanghvi; Shinichiro Umemura

Effect of matching layer on acoustic lens on suppressing lamb wave formation

Jun Kubota, Takashi Azuma, Kazunari Ishida, Megumi Motoyama, Yutaka Sato, Kazuaki Sasaki, Ken Ichi Kawabata, Narendra T. Sanghvi, Shinichiro Umemura

MEN - Biomedical Engineering

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

Therapeutic variable focal length ultrasound transducer (VFLT) for HIFU using linear array and cylindrical lens with low-loss matching layer in front for suppressing Lamb wave has been developed. The cylindrical lens with a thickness of approximately half a wavelength, directly attached to PZT transducer on the other side, has an acoustic matching layer. Numerical simulation of wave propagation was performed using a finite element method. Prototype VFLT with and without the layer were then fabricated and tested. The comparison of the results clearly showed the effect of the layer to suppress Lamb wave formation in the lens. Canine prostate was transrectally treated and successfully coagulated with the transducer with a Lamb wave suppressing matching layer (LWSL) on the lens.

Original language	English
Pages (from-to)	1044-1047
Number of pages	4
Journal	Proceedings of the IEEE Ultrasonics Symposium
Volume	1
Publication status	Published - 2003 Dec 1
Event	2003 IEEE Ultrasonics Symposium - Proceedings - Honolulu, HI, United States Duration: 2003 Oct 5 → 2003 Oct 8

ASJC Scopus subject areas

Acoustics and Ultrasonics

Cite this

Effect of matching layer on acoustic lens on suppressing lamb wave formation. / Kubota, Jun; Azuma, Takashi; Ishida, Kazunari; Motoyama, Megumi; Sato, Yutaka; Sasaki, Kazuaki; Kawabata, Ken Ichi; Sanghvi, Narendra T.; Umemura, Shinichiro.

In: Proceedings of the IEEE Ultrasonics Symposium, Vol. 1, 01.12.2003, p. 1044-1047.

Research output: Contribution to journal › Conference article › peer-review

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abstract = "Therapeutic variable focal length ultrasound transducer (VFLT) for HIFU using linear array and cylindrical lens with low-loss matching layer in front for suppressing Lamb wave has been developed. The cylindrical lens with a thickness of approximately half a wavelength, directly attached to PZT transducer on the other side, has an acoustic matching layer. Numerical simulation of wave propagation was performed using a finite element method. Prototype VFLT with and without the layer were then fabricated and tested. The comparison of the results clearly showed the effect of the layer to suppress Lamb wave formation in the lens. Canine prostate was transrectally treated and successfully coagulated with the transducer with a Lamb wave suppressing matching layer (LWSL) on the lens.",

author = "Jun Kubota and Takashi Azuma and Kazunari Ishida and Megumi Motoyama and Yutaka Sato and Kazuaki Sasaki and Kawabata, {Ken Ichi} and Sanghvi, {Narendra T.} and Shinichiro Umemura",

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journal = "Proceedings - IEEE Ultrasonics Symposium",

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T1 - Effect of matching layer on acoustic lens on suppressing lamb wave formation

AU - Kubota, Jun

AU - Azuma, Takashi

AU - Ishida, Kazunari

AU - Motoyama, Megumi

AU - Sato, Yutaka

AU - Sasaki, Kazuaki

AU - Kawabata, Ken Ichi

AU - Sanghvi, Narendra T.

AU - Umemura, Shinichiro

PY - 2003/12/1

Y1 - 2003/12/1

N2 - Therapeutic variable focal length ultrasound transducer (VFLT) for HIFU using linear array and cylindrical lens with low-loss matching layer in front for suppressing Lamb wave has been developed. The cylindrical lens with a thickness of approximately half a wavelength, directly attached to PZT transducer on the other side, has an acoustic matching layer. Numerical simulation of wave propagation was performed using a finite element method. Prototype VFLT with and without the layer were then fabricated and tested. The comparison of the results clearly showed the effect of the layer to suppress Lamb wave formation in the lens. Canine prostate was transrectally treated and successfully coagulated with the transducer with a Lamb wave suppressing matching layer (LWSL) on the lens.

AB - Therapeutic variable focal length ultrasound transducer (VFLT) for HIFU using linear array and cylindrical lens with low-loss matching layer in front for suppressing Lamb wave has been developed. The cylindrical lens with a thickness of approximately half a wavelength, directly attached to PZT transducer on the other side, has an acoustic matching layer. Numerical simulation of wave propagation was performed using a finite element method. Prototype VFLT with and without the layer were then fabricated and tested. The comparison of the results clearly showed the effect of the layer to suppress Lamb wave formation in the lens. Canine prostate was transrectally treated and successfully coagulated with the transducer with a Lamb wave suppressing matching layer (LWSL) on the lens.

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T2 - 2003 IEEE Ultrasonics Symposium - Proceedings

Y2 - 5 October 2003 through 8 October 2003

ER -

Effect of matching layer on acoustic lens on suppressing lamb wave formation

Abstract

ASJC Scopus subject areas

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