Medical dictionary. 2011.
continuous wave Doppler echocardiography — echocardiography employing continuous wave Doppler ultrasonography to record the flow of blood through the cardiovascular system … Medical dictionary
pulsed wave Doppler ultrasonography — Doppler ultrasonography in which a single transducer alternately transmits and records ultrasonic waves. It can be used to determine the site of signal origin precisely but cannot record signals with high velocities. Cf. continuous wave Doppler u … Medical dictionary
Doppler ultrasonography — ultrasonography in which the shifts in frequency between emitted ultrasonic waves and their echoes are used to measure the velocities of moving objects, based on the principle of the Doppler effect. The waves may be continuous or pulsed; the… … Medical dictionary
Doppler effect — Change of wavelength caused by motion of the source. An animation illustrating how the Doppler effect causes a car engine or siren to soun … Wikipedia
Medical ultrasonography — This article is about using ultrasound to image the human body. For imaging of animals in research, see Preclinical imaging. Sonography redirects here. For the tactile alphabet called sonography , see Night writing. Medical ultrasonography… … Wikipedia
Transcranial doppler — (TCD) is a test that measures the velocity of blood flow through the brain s blood vessels. Used to help in the diagnosis of emboli, stenosis, vasospasm from a subarachnoid hemorrhage (bleeding from a ruptured aneurysm), and other problems, this… … Wikipedia
Venous Translucence — Venous translumination or translucence, has been applied in phlebology since 1996 by the surgeon Pedro Fernandes Neto, during ambulatory clinical exams (Brazil). The results were registered in annals of national and international congresses of… … Wikipedia
Ultrasound — Not to be confused with Supersonic .Ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy,… … Wikipedia
