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首页> 外文期刊>Materials Research Innovations >Feasibility Of Miniature High-Frequency Piezoelectric Ceramic Hollow Spheres For Exposimetry And Tissue Ablation
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Feasibility Of Miniature High-Frequency Piezoelectric Ceramic Hollow Spheres For Exposimetry And Tissue Ablation

机译：微型高频压电陶瓷空心球用于比色法和组织消融的可行性

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Miniature, high frequency piezoelectric ceramic hollow spheres were evaluated for potential use as hydrophones for exposimetry of high intensity ultrasound fields and as minimally invasive tissue ablation devices. Spheres with diameters ranging from 0.7 to 1.0 mm, with resonance frequencies from 1.8 to 2.7 MHz were used as hydrophones. An almost constant sensitivity was reported for these hydrophones and an omni directional receive pattern was also demonstrated. The hollow sphere hydrophone exhibited twice the sensitivity of a needle hydrophone but with no pre-amplification stages and could withstand four times higher pressure. As a minimally invasive interstitial ablation device, the results demonstrated an increased necrosed tissue volume for increasing exposure time. For example, with a 1.0 mm diameter sphere (f = 1.87 MHz), the necrosed tissue diameter as a function of exposure times was 2.35 +- 0.34, 3.00 +- 0.37 and 4.61 +- 1.13 mm for 5,10 and 15 sec. sonications, respectively.
机译：对微型，高频压电陶瓷空心球进行了评估，以作为潜在的水听器用于高强度超声场的辐射测定以及微创组织消融装置。直径范围从0.7到1.0 mm，共振频率从1.8到2.7 MHz的球体被用作水听器。据报道，这些水听器的灵敏度几乎恒定，并且还展示了全向接收模式。中空球形水听器的灵敏度是针状水听器的两倍，但没有前置放大级，可以承受四倍的高压。作为一种微创性间质消融设备，结果表明增加了坏死组织体积，从而延长了暴露时间。例如，对于1.0mm直径的球体（f ＝ 1.87MHz），坏死组织直径作为暴露时间的函数为5,10和15秒为2.35±0.34、3.00±0.37和4.61±1.13mm。分别进行超声处理。

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