Advanced Ultrasonic Medical Imaging Transducers

先进的超声波医学成像换能器

• 批准号: 6691624
• 负责人: WALTER G SCOTT
• 金额: $ 9.97万
• 依托单位: WINPROBE CORPORATION
• 依托单位国家: 美国
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-29 至 2004-12-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6691624
• 关键词: bioimaging /biomedical imaging; biomedical equipment development; image enhancement; lead; method development; polymers; titanium; zinc

DESCRIPTION (provided by applicant): Phase I will demonstrate the feasibility of fabricating medical ultrasonic transducers from a molded composite material of PZT pillars embedded in a polymer. The material has superior properties to the current material made by "dice and fill". The proposed techniques would lead to reductions in costs and production times of array transducers. The methods proposed are applicable to single elements and arrays. The production of a commercially useful 1.75D phased array with 320 elements is proposed as a milestone for Phase I. The team's background and tooling will allow development of PZT powder doping, sintering and densification, micro molding of shapes, modeling of piezo characteristics in FEA, beam modeling, measurement and image quality analysis. Precisely molded composite materials provide the opportunity to economically construct stacks in array transducers. The team will design, build and extensively test stacks of array sections. The stacks are anticipated to be four differing height layers tuned to create an extremely wide bandwidth device. Transducers for a specific application could be designed and manufactured from a list of prefabricated materials that the team will characterize. A collection of modeling programs would be integrated with the materials to allow researchers access to low cost high performance transducers with rapid delivery.

描述（由申请人提供）： 第一阶段将证明从嵌入聚合物中的PZT柱的模制复合材料制造医疗超声换能器的可行性。该材料具有比当前“切割和填充”制成的材料更优越的上级性能。所提出的技术将导致阵列换能器的成本和生产时间的减少。所提出的方法适用于单阵元和阵列。生产一个商业上有用的1.75维相控阵列与320个元素，建议作为一个里程碑的第一阶段。 该团队的背景和工具将允许开发PZT粉末掺杂，烧结和致密化，形状的微成型，FEA中的压电特性建模，梁建模，测量和图像质量分析。 精确模制的复合材料提供了在阵列换能器中经济地构造叠层的机会。该团队将设计，构建和广泛测试阵列部分的堆栈。预计堆栈将是四个不同高度的层，以创建一个极宽的带宽设备。 用于特定应用的传感器可以从团队将表征的预制材料列表中设计和制造。一系列建模程序将与材料集成，使研究人员能够快速获得低成本高性能传感器。