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首页> 外文会议>Pan American Health Care Exchanges Conference >Preliminary analysis and simulation of the influence of radiations from the rim of therapeutic transducers in the irradiated acoustic field
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Preliminary analysis and simulation of the influence of radiations from the rim of therapeutic transducers in the irradiated acoustic field

机译：辐射声场治疗换能器边缘辐射影响的初步分析与仿真

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In this work, the radiation behavior of two ultrasonic therapy applicators (working around 1 MHz range) is investigated when they are radiating into water media having acoustic impedance similar to that being encountered in biological tissues. Several experimental plots of field patterns generated by both therapy transducers are gate-detected and accurately evaluated in laboratory. One very serious problem observed in many real ultrasonic patterns emitted at the very near field is the influence of non-ideal housing radiation in the effectively radiated acoustic energy patterns. This measuring fact is shown in some detail and its causes are theoretically analyzed here. These additional radiation effects perturb the desired spatial uniformity in the emitted ultrasonic field and could change the beam path causing that therapeutic radiation outside the treatment field should be heating neighbor tissues. A preliminary analysis to check in the practice these possible real radiation problems, associated with such type of ultrasonic therapeutic devices, is presented. And a computer simulation, using Zemanek [1] method, of the influence of anomalous & unexpected radiations, originated by aperture rim and housing of a typical therapy transducer, in the effective acoustic field, is presented here, comparing it with experimental results.
机译：在这项工作中，当它们辐射到具有类似于生物组织中的声学阻抗的水介质中时，研究了两个超声治疗施加器的辐射行为（工作约为1MHz范围）。由治疗换能器产生的几个实验图是在实验室中检测到的栅极检测和准确地评估。在非常近场发射的许多真正超声波图案中观察到的一个非常严重的问题是非理想壳体辐射在有效辐射的声能模式中的影响。该测量事实有一些细节显示，其原因在这里进行了理论上分析。这些额外的辐射效应能够扰乱发射的超声场中所需的空间均匀性，并且可以改变引起处理领域外部的治疗辐射的光束路径应该是加热邻居组织。提出了一种初步分析，以检查与这种类型的超声治疗装置相关的这些可能的真实辐射问题。和计算机仿真，使用Zemanek [1]方法，对异常的影响＆＃x00026;在此，在有效声场中源于孔径边缘和典型治疗传感器的壳体的意外辐射，在此，将其与实验结果进行比较。

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