TY - JOUR
T1 - Focused ultrasound transducer for thermal treatment
AU - Umemura, Shin Ichiro
N1 - Publisher Copyright:
© 2015 Informa UK Ltd. All rights reserved: reproduction in whole or part not permitted.
PY - 2015/3/1
Y1 - 2015/3/1
N2 - Air-backed transducers have been employed for thermal ultrasonic treatment including both ablation and hyperthermia because the power efficiency rather than the bandwidth is a main concern, unlike a typical imaging transducer working in a pulse mode. The characteristic of an air-backed piezoelectric transducer with a matching layer is analysed, and the role and choice of the matching layer is discussed. An element size of a focused array transducer, appropriate for such thermal treatment, is then estimated, and the characteristic of a piezoceramic transducer element of such a size was numerically analysed using a finite element code. The characteristic of a piezocomposite transducer element is also numerically analysed and its suitability to such a therapeutic array transducer is discussed.
AB - Air-backed transducers have been employed for thermal ultrasonic treatment including both ablation and hyperthermia because the power efficiency rather than the bandwidth is a main concern, unlike a typical imaging transducer working in a pulse mode. The characteristic of an air-backed piezoelectric transducer with a matching layer is analysed, and the role and choice of the matching layer is discussed. An element size of a focused array transducer, appropriate for such thermal treatment, is then estimated, and the characteristic of a piezoceramic transducer element of such a size was numerically analysed using a finite element code. The characteristic of a piezocomposite transducer element is also numerically analysed and its suitability to such a therapeutic array transducer is discussed.
KW - Air-backed transducer
KW - Focused array transducer
KW - Matching layer
KW - Ultrasound
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U2 - 10.3109/02656736.2015.1008059
DO - 10.3109/02656736.2015.1008059
M3 - Review article
C2 - 25753368
AN - SCOPUS:84928174469
VL - 31
SP - 216
EP - 221
JO - International Journal of Hyperthermia
JF - International Journal of Hyperthermia
SN - 0265-6736
IS - 2
ER -