A change in the frequency of waves, such as sound or light, received by an observer, when the source is moving relative to the observer. The frequency increases when the source is approaching and decreases when it is retreating. The Doppler effect is used in a number of medical applications...
Medical Definition Doppler effect noun : a change in the frequency with which waves (as sound, light, or radio waves) from a given source reach an observer when the source and the observer are in motion with respect to each other so that the frequency increases or decreases according to...
Ultrasonic Doppler effect applied to locate arteries and veins - ensuring successful medical puncture at first attemptPuncture of an artery or vein, e.g., the femoral artery, usually requires several attempts, especially with corpulent patients or blood vessels that displace easily. The device is ...
Initial applications of the Doppler principles focused on astronomic studies, before Paul Langevin, who also pioneered the use of piezoelectric crystals, used the Doppler effect to develop the first sonar equipment to detect submarines during World War I [270]. However, the first medical application...
The Doppler effect also has applications in medical physics. In a Doppler echocardiogram, sound waves of a certain frequency are channeled into the heart and reflect off of blood cells moving through the heart and blood vessels. Similar to the Doppler radar, cardiologists can understand the speed...
Uses of Doppler Effect Many people mistake the Doppler effect to be applicable only for sound waves. It works with all types of waves including light. Below, we have listed a few applications of the doppler effect: Sirens Radar Astronomy Medical Imaging Blood Flow Measurement Satellite Communicat...
Noun1.echocardiography- a noninvasive diagnostic procedure that uses ultrasound to study to structure and motions of the heart diagnostic procedure,diagnostic technique- a procedure followed in making a medical diagnosis Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University...
A newly developed two‐dimensional blood flowimaging system that uses the ultrasoundDoppler effect is presented, in which blood flow behavior in a given cross section of a living organ is displayed in real time. To perform this, an autocorrelation technique is employed. In the technique, ultrasoni...
Doppler radar, which uses the Doppler effect to calculate the speed of moving objects, is a form of technology used not only by law-enforcement officers, but also by meteorologists. The change in frequency experienced as a result of the Doppler effect is exactly twice the ratio between the ...
As mentioned earlier, Doppler broadening, in the nuclear data context, is a topic in which the effect of the temperature of the target material on the neutron-nuclear cross-section variation is studied. At any temperature higher than absolute zero, that is, at any practical temperature, the at...