Ultra-Wideband, Asymmetric Ultrasonic Transducers

超宽带、非对称超声波换能器

• 批准号: 6444259
• 负责人: CHARLES S DESILETS
• 金额: $ 26.25万
• 依托单位: ULTREX CORPORATION
• 依托单位国家: 美国
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-05-01 至 2003-05-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6444259
• 关键词: bioimaging /biomedical imaging; biomedical equipment development; ceramics; computer simulation; computer system design /evaluation; computer system hardware; electrical conductance; image enhancement; phantom model; sound frequency; ultrasonography; ultrasound

DESCRIPTION (Provided by Applicant): The objective of our research is to develop an ultrasonic transducer technology which will increase the bandwidth of medical arrays to two octaves or more while maintaining high transduction efficiency. This technology is based on asymmetric, multilayer piezoelectric layers and multiple matching layers. In particular, one class of asymmetrical structures, consisting of unequal thickness, two layer piezoelectric ceramic with three matching layers, will be the focus of this research. The efficacy of many present and future medical ultrasonic imaging applications would be greatly enhanced with ultra-wide bandwidth capability, such as harmonic imaging and image guided therapy. We have chosen to build a device supporting an innovative scheme, conceived at the University of Michigan, to use a ultra-wideband, low frequency pumping pulse to enhance the contrast of images made in real-time by a wideband, high frequency imaging array. We will conduct extensive finite element simulations in order to optimize the design of the 1 MHz pump array, develop more powerful simulation tools in order to conduct virtual prototyping of the complex structure, and then design, construct, and test the array. The much smaller imaging array will be mounted in the center of the pump array. System tests of the device will be carried out at the end of the project.

描述（由申请人提供）：我们研究的目的是 开发一种超声波传感器技术，该技术将增加带宽 在维持高转导的同时，医疗阵列到两个八度或更多 效率。该技术基于不对称的多层压电 层和多个匹配层。特别是一类不对称 结构，包括不等厚度，两层压电陶瓷 具有三个匹配层，将成为这项研究的重点。的功效 许多现在和未来的医疗超声检查应用程序将是 超宽带宽功能大大增强了，例如谐波成像 和图像指导疗法。我们选择构建支持一个设备 在密歇根大学构思的创新计划，使用 超宽带，低频抽水脉冲以增强图像的对比度 由宽带高频成像阵列实时制造。我们将进行 广泛的有限元模拟，以优化1的设计 MHz泵阵列，开发更强大的模拟工具以进行 复杂结构的虚拟原型制作，然后设计，构造和 测试阵列。较小的成像阵列将安装在 泵阵列。设备的系统测试将在 项目。