High Frequency, Large Aperture Ultrasound Transducer Arrays for Volumetric Ophtha

用于体积眼科的高频、大口径超声换能器阵列

• 批准号: 7051635
• 负责人: Wesley S. Hackenberger
• 金额: $ 10万
• 依托单位: TRS TECHNOLOGIES, INC.
• 依托单位国家: 美国
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7051635
• 关键词: ceramics; eye; ultrasound

DESCRIPTION (provided by applicant): The goal of the proposed research is to develop a high-frequency, broadband, large-aperture ultrasound transducer for rapid 3-D ophthalmic imaging. TRS proposes to make high frequency piezoelectric ultrasound transducer arrays using photolithography to define micron-scale feature sizes and chemical etching to micro-machine the desired transducer structure. The key innovation behind the proposed technology is the combination of single crystal piezoelectrics with deep reactive ion etching (DRIE) to make very fine scale transducer structures with piezoelectric properties that surpass even those of low-frequency, ceramic-based transducers. For Phase I, TRS will demonstrate a 1-D, 30 MHz, linear array transducer with a bandwidth approaching 100%. In Phase II, a linear array with elevation elements will be developed for rapid volumetric scanning. The array will also be curved to match the surface of the eye. Successful completion of this program will eliminate the need for mechanically scanned single element transducers greatly improving patient comfort, decreasing scan time, and improving the accuracy of the 3-D pachymetry maps through reduced patient motion. The broad bandwidth will also facilitate both anterior and posterior imaging with 1 transducer. The device will thus improve the performance of ophthalmic ultrasound for a broad range of clinical applications including cataract treatment by lens replacement, LASIK, intraocular melanoma characterization, retinal imaging and glaucoma testing.

描述（由申请人提供）：拟议研究的目标是开发一种用于快速 3D 眼科成像的高频、宽带、大孔径超声换能器。 TRS 提议使用光刻来定义微米级特征尺寸并使用化学蚀刻来微加工所需的换能器结构来制造高频压电超声换能器阵列。该技术背后的关键创新是将单晶压电与深反应离子蚀刻（DRIE）相结合，以制造非常精细的换能器结构，其压电特性甚至超越了低频陶瓷换能器。在第一阶段，TRS 将展示带宽接近 100% 的一维、30 MHz 线性阵列换能器。在第二阶段，将开发具有高程元件的线性阵列，用于快速体积扫描。该阵列还将弯曲以匹配眼睛的表面。该计划的成功完成将消除对机械扫描单晶传感器的需求，从而极大地提高患者舒适度，减少扫描时间，并通过减少患者运动来提高 3D 测厚图的准确性。宽带宽还有助于使用 1 个换能器进行前部和后部成像。因此，该设备将提高眼科超声的性能，用于广泛的临床应用，包括晶状体置换治疗白内障、LASIK、眼内黑色素瘤表征、视网膜成像和青光眼测试。