What is Ultrasound and how does it work?

Ultrasound uses high frequency sound waves to image the inside of your body projecting the pictures onto a screen. Ultrasound does not use radiation, is painless and can be carried out with movement.

A sonographer, a health professional trained in ultrasound will perform your scan. The sonographer will use a plastic soft hand-held transducer transmitting high frequency sound waves into your body. The sound waves reflect from different tissues in characteristic ways. The different reflection rates are converted into electrical impulses that produce the moving image seen on the monitor.

The sonographer will ask you to lie down on bed and the area to be examined will be exposed. Gel is applied to the skin allowing the sound waves to pass more easily through the body. The transducer (smooth plastic handheld device) is moved around the area of interest. Images are recorded. The procedure usually takes no longer than 30 minutes.

How should I prepare for my Ultrasound?

Preparation for ultrasound scans varies with the procedure, our reception staff will inform you of any preparation requirements at the time of booking.

Pelvic, Renal and Obstetric scans:

You will be required to drink 1.5 litres of water over an hour, finishing 1 hour before your scheduled appointment time. Do not use the bathroom in this time.

Abdominal, Renal Arteries and Aorta arteries Ultrasound:

You will be required to fast for 6 hours, no eating or drinking.

Breast , Thyroid, Testes and Musculoskeletal (muscle, bone, joint related):

No preparation is required.

How safe is Ultrasound?

Ultrasound has no known risk. In some cases patients may feel some discomfort but this should not last.

North Sydney