HARMONIC DOPPLER ULTRASOUND EMBOLUS CHARACTERIZATION

谐波多普勒超声栓塞表征

• 批准号: 6211168
• 负责人: Mark A Moehring
• 金额: $ 9.95万
• 依托单位: SPENCER TECHNOLOGIES
• 依托单位国家: 美国
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2003-09-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6211168
• 关键词: air embolism; bioimaging /biomedical imaging; biomedical equipment development; embolism; phantom model; thromboembolism; ultrasound blood flow measurement

Recent Doppler ultrasound technological advances have demonstrated the unique capability to detect microemboli in the arterial and venous circulation. Microemboli have been implicated as the source or prelude of stroke and associated neurologic deficit. An unknown that would help determine the underlying pathology and the appropriate therapy is the composition of the individual microemboli. This proposal is to adapt advances in ultrasound echo processing, transducer, and harmonic detection technologies to determine microembolus composition as bubble or solid (formed element). Three areas of development are set forth: (1) adapting an existing digital Doppler platform to perform second harmonic Doppler analysis of echoes from microemboli, (2) developing a wide bandwidth ultrasound probe for normal Doppler processing at 1 MHz and second harmonic Doppler processing at 2 MHz, which have similar sensitivity patterns for each frequency, and (3) determine in vitro the best detection scheme for maximizing the ability to distinguish microbubbles from microparticles. This technology is especially important for reducing the incidence of stroke and neurologic compromise associated with various cardiovascular pathologies and surgery of the heart and of the carotid arteries. A device for discrimination of composition of microemboli represents a major commercial market potential. PROPOSED COMMERCIAL APPLICATIONS: The instrument to be developed in this project will characterize microemboli in blood flow as either gaseous or particulate, using ultrasound first and second harmonic Doppler analysis of microembolic signatures. This instrument will not require a user who is an ultrasound expert, and will target physician and technologist staff in the operating room, vascular laboratory, and emergency medicine markets. This simple to use ultrasound device will be aimed at a worldwide market.

最近的多普勒超声技术进步已经证明了检测动脉和静脉循环中微栓子的独特能力。微栓子被认为是中风和相关神经功能缺损的根源或前奏。有助于确定潜在病理学和适当治疗的未知因素是单个微栓子的成分。该提案旨在采用超声回波处理、换能器和谐波检测技术的进步来确定微栓子成分是气泡还是固体（形成的元素）。阐述了三个开发领域：(1) 采用现有的数字多普勒平台对微栓子回波进行二次谐波多普勒分析，(2) 开发宽带宽超声探头，用于 1 MHz 的正常多普勒处理和 1 MHz 的二次谐波多普勒处理。 2 MHz，每个频率具有相似的灵敏度模式，并且（3）确定体外最佳检测方案，以最大限度地提高区分微泡和微粒的能力。该技术对于降低中风和与各种心血管病理以及心脏和颈动脉手术相关的神经系统损害的发生率尤其重要。用于辨别微栓塞成分的装置代表了主要的商业市场潜力。拟议的商业应用：该项目中要开发的仪器将使用微栓子特征的超声第一和第二谐波多普勒分析将血流中的微栓子表征为气体或颗粒。该仪器不需要超声专家的用户，并且将针对手术室、血管实验室和急诊医学市场的医生和技术人员。这种简单易用的超声波设备将面向全球市场。