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Capital & Coast DHB Radiology

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Ultrasound is a technique using pulsed high frequency sound waves to produce an image of a wide range of body parts and blood vessels.

A hand-held transducer and gel will be placed on the skin.  The transducer sends a brief pulse of sound (a millionth of a second) into the body.  The travelling pulse reaches different body structures and sends back echoes to a high speed computer which transforms them into images which are displayed on a monitor.

Your ultrasound will be performed by a sonographer or a radiology doctor.  As far as medical research understands, diagnostic ultrasound is a safe procedure.

Doppler Ultrasound
A Doppler study is a non-invasive scan that can be used to evaluate blood flow by bouncing high-frequency sound waves off red blood cells. The Doppler Effect is a change in the frequency of sound waves caused by moving objects. A Doppler study can estimate how fast blood flows and can help diagnose blood clots, heart and leg valve problems and blocked or narrowed arteries.


This page was last updated at 10:53AM on April 13, 2016.