Doppler Ultrasound
By monitoring the rate of change in pitch, a Doppler Ultrasound may calculate how quickly blood flows (frequency). A sonographer with training in ultrasound imaging applies pressure to your skin with a tiny, hand-held instrument (transducer) roughly the size of a bar of soap across the area of your body being scanned, moving from one place to another as required.
As an alternative to more invasive treatments like angiography, which involves injecting dye into the blood arteries to make them visible on X-ray images, this test may be performed. Your doctor may use a Doppler ultrasound to assess for artery damage or to keep track of specific vein and artery therapies.
