Study of Ultrasound Doppler Spectra Statistics Signal to Noise Ratio & Pressure

超声多普勒频谱统计信噪比研究

• 批准号: 8705239
• 负责人: Vernon Newhouse
• 金额: $ 14.5万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-10-01 至 1990-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8705239&HistoricalAwards=false
• 关键词: Study; Ultrasound; Doppler; Spectra; Statistics

This research has developed a very important and novel means of measuring blood flow. In a conventional Doppler flow measurement, the sensor and transmitter, which produces the ultrasound waves in the blood, must be positioned such that the sensors and blood flow must be nearly parallel. It is known that for angles close to 90 degrees, a small error in the angle leads to a large error in the flow estimate. However, this problem is resolved if one uses the method proposed here namely a "spectrum band-width" to estimate frequency. This technique of using spectrum band-width for velocity estimates opens up the previously inaccessible range of angles which are nearly perpendicular to the flow of blood. Placement of the sensor directly on the blood vesicle without having to bend the vesicle will greatly increase the utility and convenience of the measurement.

这项研究开发了一种非常重要和新颖的方法， 测量血流量 在传统的多普勒流量测量中， 传感器和发射器，其产生超声波， 必须定位传感器和血流， 几乎平行。 已知对于接近90度的角度， 角度中的小误差导致流量估计中的大误差。 然而，如果使用这里提出的方法，则解决了该问题 即用于估计频率的“频谱带宽”。 的这种技术 使用频谱带宽进行速度估计， 几乎垂直于气流的不可接近角度范围 鲜血 将传感器直接放置在血囊上， 必须使囊泡弯曲将大大增加效用， 测量的方便性。