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公开(公告)号：US4217909A
公开(公告)日：1980-08-19
申请号：US936111
申请日：1978-08-23
IPC分类号： G01P5/00 , A61B8/00 , A61B8/06 , A61B8/12 , A61B8/14 , G01F1/66 , G01P5/24 , G01S15/50 , G01S15/89 , A61B5/02
CPC分类号： G01S15/8979 , A61B8/06 , A61B8/13 , G01P5/244 , A61B8/12 , A61B8/4488 , G01N2291/02836
摘要： The velocity and direction of the flow of blood and similar liquids, toward or away from the transducer, are measured by coherent demodulation of the received echoes in two quadrature components and subsequent real time processing by a complex Fourier transform processor. A distribution of Doppler frequency shifts and bidirectional velocities are detected and displayed. The preferred embodiment is a duplex imaging system with a sector scanner into which a Doppler modality is incorporated with little added complexity.
摘要翻译： 血液和类似液体流向或远离换能器的速度和方向通过两个正交分量的接收回波的相干解调和后续的复数傅里叶变换处理器的实时处理来测量。 检测并显示多普勒频移和双向速度的分布。 优选实施例是具有扇区扫描器的双面成像系统，多普勒模式被并入到其中，几乎没有增加的复杂性。
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2.发明授权Duplex ultrasonic imaging system with repetitive excitation of common transducer in doppler modality 失效双重超声波成像系统，在多普勒模式中重复激发普通换能器
公开(公告)号：US4182173A
公开(公告)日：1980-01-08
申请号：US936115
申请日：1978-08-23
CPC分类号： G01S15/8979 , A61B8/00 , A61B8/06 , A61B8/13 , G01N29/0645
摘要： A duplex imaging system with a common transducer array for both modes of operation satisfies the conflicting bandwidth requirements by single impulse excitation of the transducer in B-scan imaging operation to generate a wide bandwidth ultrasound pulse and multiple impulse excitation at the emission frequency in Doppler mode operation to generate a narrow bandwidth ultrasound phase. The multiple impulse excitation has a variable repetition frequency depending on range to a sample volume and velocity of blood flow. A Doppler modality, in which the frequency shift of echoes caused by flow of blood is measured to derive the flow velocity, is incorporated into a sector scanner with little additional complexity.
摘要翻译： 具有两种工作模式的通用换能器阵列的双工成像系统通过B扫描成像操作中的换能器的单脉冲激励来满足冲突的带宽要求，以在多普勒模式中产生宽带宽超声波脉冲和多脉冲激励 操作生成窄带超声波相位。 多脉冲激励具有取决于样品体积和血流速度的范围的可变重复频率。 一种多普勒模式，其中测量由流动的血液引起的回波的频率偏移以导出流速，并入少部分复杂性的扇区扫描仪中。
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公开(公告)号：US4265126A
公开(公告)日：1981-05-05
申请号：US48711
申请日：1979-06-15
CPC分类号： G01S15/8984 , A61B8/06 , G01F1/663 , G01P5/244 , G01S7/52063
摘要： Two components of the velocity of blood or similar liquids and the true flow vector are derived by a linear transducer array cross-beam configuration. Ultrasound pulses are transmitted from the center elements and backscattered echoes are received by left and right receiver sub-arrays whose locations depend on the observation point. A duplex imaging system with a sector scanner incorporates a Doppler modality with little added complexity and provides components of flow velocity parallel to and transverse to the acoustic beam direction from which the true velocity vector is computed.
摘要翻译： 通过线性换能器阵列横梁配置导出血液或类似液体的速度和真实流动矢量的两个分量。 超声脉冲从中心元件发射，后向散射回波由位置取决于观察点的左右接收器子阵列接收。 具有扇区扫描器的双面成像系统结合了多普勒模态，几乎没有增加的复杂性，并且提供平行于并横向于计算真实速度矢量的声束方向的流速的分量。
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4.发明授权Quantitative volume blood flow measurement by an ultrasound imaging system featuring a Doppler modality 失效通过具有多普勒模态的超声成像系统进行定量体积血流测量
公开(公告)号：US4257278A
公开(公告)日：1981-03-24
申请号：US069357
申请日：1979-08-24
CPC分类号： A61B8/06 , G01F1/663 , G01S15/8979
摘要： A technique particularly suitable for measuring volume flow rate in the ascending aorta employs real time sector-scan imaging to locate the cross section of interest and align the Doppler beam with the vessel axis. The number of active transmit and receive array transducer elements is varied to electronically tailor the acoustic beam cross section at the required range to be approximately equal to the vessel cross section, which is the sample volume. Mean flow velocity is computed by averaging the spectral components extracted from the sample volume by a Fourier transform processor. Volume flow rate is calculated by multiplying mean flow velocity and estimated area.
摘要翻译： 特别适用于测量升主动脉体积流量的技术采用实时扇形扫描成像来定位感兴趣的横截面，并将多普勒波束与血管轴对齐。 改变活动的发射和接收阵列换能器元件的数量以将所需范围内的声束横截面电子地定制成大致等于作为样本体积的血管横截面。 通过傅立叶变换处理器对从样本体积提取的谱分量进行平均来计算平均流速。 体积流量通过乘以平均流速和估计面积来计算。
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