ACOUSTIC POWER CALIBRATIONS OF CYLINDRICAL INTRACAVITARY ULTRASOUND HYPERTHERMIA APPLICATORS
ACOUSTIC POWER CALIBRATIONS OF CYLINDRICAL INTRACAVITARY ULTRASOUND HYPERTHERMIA APPLICATORS
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DOI：
10.1118/1.597094
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发表时间：
1993-01-01
期刊：
影响因子：
3.8
通讯作者：
HYNYNEN, K
中科院分区：
文献类型：
--
作者：
HYNYNEN, K
初步的临床结果表明，一些肿瘤可以很好地利用放置在体腔内的圆柱形超声源加热。本文介绍一种测量圆柱形腔内换能器声功率的简单方法。利用黄铜反射镜将径向传播的声场转换成单向声束，并测量了该声束对吸收目标的辐射力。几种临床腔内阵列的功率输出在相同形状的换能器元件之间变化显著。结果表明，在临床使用前测量每个元件的声功率输出是很重要的。辐射力技术是简单和敏感的，可以很容易地适应作为一个常规的临床质量保证方法。
Preliminary clinical results indicate that some tumors can be heated well utilizing cylindrical ultrasound sources placed in body cavities. In this paper a simple method for measuring the acoustic power from cylindrical intracavitary transducers will be described. The radially propagating acoustic field was converted to a beam with a single propagation direction by a brass reflector, and the radiation force generated by this beam on an absorbing target was measured. The power output of several clinical intracavitary arrays varied significantly between identically shaped transducer elements. The results show that it is important to measure the acoustic power output from each element prior to its clinical use. The radiation force technique is simple and sensitive and can be easily adapted to be used as a routine clinical quality assurance method.