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Laboratory characterization of electromechanical behaviour of Bessel array-transducer annuli for detection imaging in biological media

机译:贝塞尔阵列换能器载载生物介质检测与成像的机电行为实验室特征

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X wave annular arrays, properly driven, could be extensively applied for medical imaging and detection. The main utility of such a device is to permit the achieving of good collimation in the ultrasonic beam maintained along certain depth. In order to generate these kinds of waves, it is necessary to precisely excite a radiating aperture in a Bessel-transducer way. The work aim is the characterization of the behavior of array annuli in a 2 MHz piezoelectric Bessel transducer. The analysis, in function of the frequency, of a basic electrical characterization, measuring the electrical complex admittance and the cross-coupling of the array elements, as well as the evaluation of the annuli emission impulse responses, are performed by employing an installation of own design (Videus-CSIC lab), reciently developed for: pulsed acoustic signals acquisition, efficient array driving and advanced processing. Knowing the response of each one of elements in this type of array, it is already possible the achieving of a correct design of the especial multichannel pulsed electrical driving needed to generate limited diffraction X-waves applicable in medicine.
机译:X波环形阵列,适当驱动,可以广泛应用于医学成像和检测。这种装置的主要效用是允许在沿着一定深度保持的超声波束中实现良好的准直。为了产生这些类型的波,必须以贝塞尔 - 换能器方式精确激发辐射孔。工作目的是在2MHz压电贝塞尔换能器中阵列云的行为的表征。通过采用自己的安装来执行诸如阵列元件的基本电学表征的频率的频率的分析,以及阵列元件的交叉耦合,以及对云发射脉冲响应的评估设计(视频-CSIC实验室),重新开发,用于:脉冲声学信号采集,高效阵列驾驶和高级处理。知道在这种类型的阵列中的每个元件的响应,已经可能实现了在适用于医学中的有限衍射X波所需的特殊多通道脉冲电驱动所需的正确设计。

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