Dual frequency high intensity focused ultrasound to accelerate hemostasis

2004 ◽  
Vol 116 (4) ◽  
pp. 2560-2560
Author(s):  
Michael R. Bailey ◽  
Adam D. Maxwell ◽  
Justin A. Reed ◽  
Wayne Kreider ◽  
Vera A. Khokhlova ◽  
...  
Keyword(s):  
High Intensity ◽  
Focused Ultrasound ◽  
High Intensity Focused Ultrasound ◽  
Dual Frequency

Microbubble mediated dual-frequency high intensity focused ultrasound thrombolysis: AnIn vitrostudy

2017 ◽  
Vol 110 (2) ◽  
pp. 023703 ◽  
Author(s):  
Dingjie Suo ◽  
Zhiyang Jin ◽  
Xiaoning Jiang ◽  
Paul A. Dayton ◽  
Yun Jing
Keyword(s):  
High Intensity ◽  
Focused Ultrasound ◽  
High Intensity Focused Ultrasound ◽  
Dual Frequency

scholarly journals High Intensity Focused Ultrasound Transducer Using Inversion Layer Technique for Ultrasound Therapy

2017 ◽  
Author(s):  
Chan Yuk Park ◽  
Da Sol Kwon ◽  
Jin Ho Sung ◽  
Jong Seob Jeong
Keyword(s):  
High Intensity ◽  
Focused Ultrasound ◽  
Inversion Layer ◽  
High Intensity Focused Ultrasound ◽  
Ceramic Plate ◽  
Dual Frequency ◽  
Fundamental Resonance ◽  
Cavitation Effect ◽  
Layer Technique ◽  
Frequency Ultrasound

Recently, high intensity focused ultrasound (HIFU) has been used for non-invasive surgery of prostate, uterus, and brain. However, a HIFU therapy is suffered from relatively long surgical time mainly due to small focal area per each sonication. In order to solve this problem, a HIFU therapy using multi-frequency was suggested by several researchers, and they demonstrated that this technique can increase the area of the coagulated lesion due to enhanced cavitation effect compared to single-frequency HIFU [1–3]. To generate multi-frequency especially dual-frequency, dual-element and dual-layer HIFU transducers have been developed and provided an expanded lesion size [1–3]. In this study, we present an alternative technique of making dual-frequency HIFU transducer using inversion layer technique. Generally, a single layer piezoelectric element can excite the strong fundamental resonance (f0) and the weak odd-order harmonic resonance (3f0) [4]. In the inversion layer technique, on the other hand, a piezoelectric component consisting of two piezo-ceramic plates bonded together with opposite poling directions and different thicknesses can produce the relatively strong even-order harmonic (2f0) in addition to the fundamental resonance [5]. Additionally, only a pair of electrode at the outside of the each piezo-ceramic plate is required to stimulate dual-frequency ultrasound while two pairs of electrodes are typically required for conventional dual-element and dual-layer transducers [2,3]. A specially designed prototype HIFU transducer was built, and we verified that the dual-frequency ultrasound was successfully generated through electrical impedance and pulse-echo response measurements.

Confocal dual‐frequency enhances the damaging effect of high‐intensity focused ultrasound in tissue‐mimicking phantom

2008 ◽  
Vol 17 (5) ◽  
pp. 285-291 ◽  
Author(s):  
Sheng‐Li Kuang ◽  
Bing Hu ◽  
Li‐Xin Jiang ◽  
Pei‐Zhong He ◽  
Rong‐Min Xia ◽  
...  
Keyword(s):  
High Intensity ◽  
Focused Ultrasound ◽  
High Intensity Focused Ultrasound ◽  
Dual Frequency

260: High Intensity Focused Ultrasound Combined with Endocrine Therapy in Treating High or Intermediate Risk Prostate Cancer

2006 ◽  
Vol 175 (4S) ◽  
pp. 86-86
Author(s):  
Makoto Sumitomo ◽  
Junichi Asakuma ◽  
Yasumasa Hanawa ◽  
Kazuhiko Nagakura ◽  
Masamichi Hayakawa
Keyword(s):  
Prostate Cancer ◽  
Endocrine Therapy ◽  
High Intensity ◽  
Focused Ultrasound ◽  
High Intensity Focused Ultrasound ◽  
Intermediate Risk ◽  
Risk Prostate Cancer
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