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Therefore, "duplex ultrasonography" is a misnomer for spectral Doppler ultrasonography, and more exact name should be "triplex ultrasonography". [ 3 ] This is particularly useful in cardiovascular studies (sonography of the vascular system and heart) and essential in many areas such as determining reverse blood flow in the liver vasculature in ...
Carotid ultrasonography is an ultrasound -based diagnostic imaging technique to evaluate structural details of the carotid arteries. Carotid ultrasound is used to diagnose carotid artery stenosis (CAS) and can assess atherosclerotic plaque morphology and characteristics. [1] Carotid duplex and contrast-enhanced ultrasound are two of the most ...
Transcranial Doppler. Transcranial Doppler ( TCD) and transcranial color Doppler ( TCCD) are types of Doppler ultrasonography that measure the velocity of blood flow through the brain 's blood vessels by measuring the echoes of ultrasound waves moving transcranially (through the cranium ). These modes of medical imaging conduct a spectral ...
Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics (e.g. distances and velocities) or to generate an informative audible sound.
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Unlike arterial ultrasonography, venous ultrasonography is carried out with the probe in a transversal position, (perpendicular to the vein axis), displaying cross-sections of the veins. [4] All collateral veins are better detected this way, including perforator veins , but of most importance is the detection of venous thrombosis .
Tissue Doppler echocardiography ( TDE) is a medical ultrasound technology, specifically a form of echocardiography that measures the velocity of the heart muscle ( myocardium) through the phases of one or more heartbeats by the Doppler effect (frequency shift) of the reflected ultrasound. The technique is the same as for flow Doppler ...
Duplex ultrasonography and angiography may also be used. [8] Angiography is more accurate and allows for treatment at the same time; however, it is associated with greater risks. [9] It is unclear if screening for peripheral artery disease in people without symptoms is useful, as it has not been properly studied.