通常在超声多普勒系统中,从可观测的频移中可推算沿射束轴向的速度分量。近来已证实,用脉冲多普勒系统的边缘谱也可推算垂直射束的速度分量。本文将此结论推广到任意入射角、速度梯度、孔径和脉冲源中,理论推导结果如下:均匀孔径和横向流动的波谱与以前的结果相同,关于零频率对 Often in ultrasonic Doppler systems, the velocity component along the beam axis can be extrapolated from an observable frequency shift. It has recently been demonstrated that using the edge spectrum of a pulsed Doppler system can also estimate the velocity component of a vertical beam. This paper extends this conclusion to any angle of incidence, velocity gradient, aperture and pulse source. The theoretical results are as follows: The spectra of uniform aperture and transverse flow are the same as before,