Continuous wave Doppler echocardiography has proved useful in detecting and quantitating the high velocity flow disturbances that characterize many stenotic and regurgitant valvular lesions. Pulsed Doppler echocardiography, in contrast, is limited in its ability to quantitate the high velocities that are ...
1. A doppler radar system comprising, a transmitter comprising a continuoy operating microwave oscillator, means to modulate the frequency of said transmitter simultaneously by means of a sine wave oscillator and a pulse generator, the pulse generator frequency being different than and nonharmonically ...
The noninvasive assessment of cardiovascular physiology in mice is challenging because of their small size and extremely rapid heart rates. In this study, we sought to determine the feasibility and utility of pulse wave (PW) and color flow Doppler imaging techniques when applied to mouse models of...
wave n. 1.波,波浪,波涛,海浪 2.挥手,招手 3.汹涌的行动(或思想)态势;心潮;风潮 4.涌现的人(或事物);涌动的人(或物) 5.汹涌的行动(或思想)态势;心潮;风潮 down Doppler 下行多普勒 up Doppler 上行多普勒 pulse on 启动,起动 noise(wave) 杂波 最新...
After briefly summarizing the principles of continuous-wave and pulse-Doppler operation, the concepts and relative advantages of coherent and non-coherent detection are explained. The potential clinical uses of the pulse-echo-Doppler hybrid and Doppler devices in general are then discussed. 展开 ...
目的应用彩色多普勒血流显像(color doppler flow imaging CDFI)及脉冲多普勒(pulse wave doppler PW)检测视网膜中央动脉阻塞病变(central retinal artery occlusion C... 田贞 - 《中国实用眼科杂志》 被引量: 14发表: 2005年 加载更多来源期刊 Annals of Pediatric Cardiology 2016 研究点推荐 Congenital heart diseas...
Increased arterial stiffness is observed in a number of cases. The analysis of the regional functional arterial properties is of interest to determine the role of a given risk factor on the vascular wall and in some diseases such as atherosclerosis. We analysed the pulse wave velocity (PWV) mea...
Pulse wave velocity (PWV) measurement is widely used for the indirect assessment of arterial wall distensibility. In order to improve its measurement technique, we built a system performing the calculation of the cross-correlation function of Doppler velocity signals. In 12 normal subjects and 10 pa...
Previous physics-based analyses of arterial morphology in relation to pulsatile pressure and flow, with pulse wave reflection, focused on the large arteries and required assumptions about the relative thicknesses of arterial walls and the velocities of p
pulse-Doppler radar (redirected fromPulse doppler) Acronyms pulse-Doppler radar [′pəls ¦dap·lər ′rā‚där] (engineering) Pulse radar that uses the Doppler effect to obtain information about the velocity of a target. McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Cop...