Annu Int Conf IEEE Eng Med Biol Soc. 2022 Jul;2022:4611-4617. doi: 10.1109/EMBC48229.2022.9872007.
The design and performance of a transducer for low frequency ultrasound tomography is presented, motivated by recent research demonstrating that acoustic waves transmitting at frequencies between 10 kHz and 750 kHz penetrate the lungs and may be useful for thoracic imaging. An adaptation of the traditional Tonpilz design was developed, vibrational amplitude and electrical impedance were measured, and an optimal frequency was determined. The design is found to meet the desired mechanical, electrical, and safety specifications. Thus, it was considered a promising option for the target application of pulmonary imaging with ultrasound computed tomography between 50 and 200 kHz; highest efficiency achieved around 125 kHz and 156 kHz, and beam divergence of 40°.
本文提出了一种用于低频超声层析成像的换能器的设计和性能，其设计灵感来自最近的研究，该研究表明频率在 10 kHz 至 750 kHz 之间的声波可以穿透肺部，并且可能对胸部成像有用。本文对传统的 Tonpilz 设计进行了改进，测量了振动幅度和电阻抗，并确定了最佳频率。设计结果满足了所需的机械、电气和安全规格。因此，它被认为是超声计算机层析成像在 50 至 200 kHz 范围内进行肺部成像的目标应用的一个很有前途的选择；在 125 kHz 和 156 kHz 附近实现了最高效率，波束发散角为 40°。
