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[Beard J D,et al.Ultras Med biol 1986;12(11):883(英文)]作者研制了一种多普勒流量计。它是用10MHz射束针和平均频率估计器制成的,它克服了现有电磁流量计和超声流量计的许多限制。这种流量计的输出与多普勒功率谱的一次项及平均血流速度成正比,脉动流输出的线性范围为1.3～50cm/s.在多
[Beard J D, et al. Ultras Med biol 1986; 12 (11): 883 (English)] The authors developed a Doppler flowmeter. It is made with a 10MHz beam pin and average frequency estimator that overcomes many of the limitations of current electromagnetic and ultrasonic flowmeters. The output of this flowmeter is proportional to the first term of the Doppler power spectrum and the average blood flow velocity, and the linear range of the pulsatile flow output is 1.3-50 cm / s.