A non-invasive technique that can be used to gauge blood flow through your blood arteries is doppler ultrasound. High-frequency sound waves are reflected off of red blood cells that are in circulation to cause it to function. A standard ultrasound can't depict blood flow; instead, it employs sound waves to create images. The Doppler ultrasound uses frequency, or the rate at which the pitch changes, to measure blood flow velocity. The Doppler ultrasound is carried out by a technician known as a sonographer who has received training in ultrasonography. A tiny, hand-held device is pressed against your skin over the area of your body being inspected by the sonographer. When needed, the equipment travels from one location to another. This examination could be used in place of more invasive techniques like angiography. In an angiography, dye is injected into the blood arteries to enhance their visibility on X-ray pictures.
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