Handheld devices can scan the lower limbs of a patient and 'listen' to the blood flow, providing vital early indication of problems that could lead to strokes or heart attacks. But inexperience or ...

The Doppler shift is something we are all familiar with. The classic acoustic Doppler shift is observed every time an emergency vehicle goes by with its siren on. When it is approaching the tone ...

HANDHELD devices can scan the lower limbs of a patient and "listen" to the blood flow, providing vital early indication of problems that could lead to strokes or heart attacks. But inexperience or ...

A Doppler ultrasound is a test that uses high-frequency sound waves to measure the amount of blood flow through your arteries and veins, usually those that supply blood to your arms and legs. Vascular ...

We have all heard the change in pitch when an ambulance or police car drives by with its siren blaring. The pitch is higher as the vehicle comes toward you, and shifts to a lower pitch as it goes away ...

The purpose of a Doppler ultrasound is to check blood flow. Doctors use the findings to help determine whether there is a blockage, narrowing, or leakage in a blood vessel. Healthcare professionals ...

An ultrasound scan uses high-frequency sound waves to create images of the inside of the body. They can help evaluate fetal development, as well as detect issues in various organs. Ultrasound scans, ...

Cranial ultrasounds are imaging tests that use sound waves to make pictures of the brain. There are two types: head ultrasounds and the transcranial Doppler. During this test, a machine sends sound ...