TY - JOUR
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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M3 - Conference article
AN - SCOPUS:4143119038
VL - 1
SP - 1044
EP - 1047
JO - Proceedings - IEEE Ultrasonics Symposium
JF - Proceedings - IEEE Ultrasonics Symposium
SN - 1051-0117
T2 - 2003 IEEE Ultrasonics Symposium - Proceedings
Y2 - 5 October 2003 through 8 October 2003
ER -