McCallum W D, Williams C S, Napel S, Daigle R E
Am J Obstet Gynecol. 1978 Oct 15;132(4):425-9. doi: 10.1016/0002-9378(78)90779-2.
In this paper a method is described for obtaining and characterizing fetal blood velocity waveforms. The signals were recorded with a range-gated Doppler instrument and characterized after spectral analysis. Preliminary observations indicate differences in the waveforms obtained during normal pregnancies compared with some complicated pregnancies.
本文描述了一种获取和表征胎儿血流速度波形的方法。信号由距离选通多普勒仪记录，并在频谱分析后进行表征。初步观察表明，正常妊娠期间获得的波形与一些复杂妊娠期间获得的波形存在差异。
