velocity of ultrasound

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• Ultrasound, Doppler — A form of ultrasound that can detect and measure blood flow. Doppler ultrasound depends on the Doppler effect, a change in the frequency of a wave resulting here from the motion of a reflector, the red blood cell. There are several kinds of… …   Medical dictionary

• Ultrasound Research Interface — An Ultrasound Research Interface (URI) is a software tool loaded onto a diagnostic clinical ultrasound device which provides functionality beyond typical clinical modes of operation. Before an ultrasound image can be displayed to the user, it… …   Wikipedia

• ultrasound dilution technique — a technique for measuring blood flow and access recirculation in hemodialysis patients: ultrasound sensors are attached to the venous and arterial catheters in their normal positions and blood flow is checked; then they are reversed, the… …   Medical dictionary

• Sound from ultrasound — Contents 1 Parametric array 2 Applications 2.1 Commercial advertising …   Wikipedia

• Doppler ultrasound — n ultrasound that utilizes the Doppler effect to measure movement or flow in the body and esp. blood flow called also Doppler ultrasonography * * * a diagnostic technique that utilizes the fact that the frequency of ultrasound waves changes when… …   Medical dictionary

• Doppler ultrasound — a diagnostic technique that utilizes the fact that the frequency of sound or light waves changes when they are reflected from a moving surface (the Doppler effect). It is used to study the flow in blood vessels and the movement of blood in the… …   The new mediacal dictionary

• Cardiac output — (Q or or CO ) is the volume of blood being pumped by the heart, in particular by a left or right ventricle in the time interval of one minute. CO may be measured in many ways, for example dm3/min (1 dm3 equals 1000 cm3 or 1 litre). Q is… …   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

• Non-invasive intracranial pressure measurement methods — Increased intracranial pressure (ICP) is one of the major causes of secondary brain ischemia that accompanies a variety of pathological conditions, most notably, traumatic brain injury (TBI), stroke, and intracranial hemorrhages. However, aside… …   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

• Magnetic resonance angiography — Intervention Time of flight MRA showing the circle of Willis in the brain. Note the venetian blinds artifact visible as the multiple pseudo stenosis on both the left and right middle cerebral artery …   Wikipedia