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Ultrasound

What is ultrasound?

ultrasoundAn ultrasound scan uses high frequency wave sounds to create an image of an organ in the body. Ultrasound is very high frequency sound that cannot be heard by the human ear, but can be detected using a machine called an ultrasound scanner.

It can be used to look at all soft tissue structures and blood vessels. It cannot be used to look at bones or the lungs or gastro-intestinal tract in detail.

Benefits

An ultrasound scan does not use x-rays. The ultrasound waves are delivered by a small handheld sensor, which is similar to a microphone. As sound waves are used, rather than radiation, the procedure is thought to be completely safe.

As well as being used to monitor an unborn baby in a pregnant woman, ultrasound is also used to highlight congenital heart disease, examine the prostate gland, uterus, ovaries and other organs of the body. Ultrasound is also used during surgery such as biopsies (where the tissue sample is taken for analysis).

The procedure

For some procedures you may be asked to fill your bladder by drinking plenty of water. For other procedures, you may be asked not to eat or drink anything for up to four hours before the test. Your consultant will give you advice depending on your individual circumstances.

The examination will be carried out by one of The Horder Centre’s consultant radiologists. Usually, an ultrasound procedure will take between fifteen minutes and half an hour, but it depends on the examination.

You will be asked to lie down on a couch and some cold gel will be applied to your body. This enables the sensor, which is passed over your skin, to pick up sound waves and an image of the part of the body being scanned is produced.

If you are, or there is a possibility you may be pregnant, please tell the radiographer before your scan. For more information, and if you have any queries about the procedure, speak to your consultant.

  • Continue taking your normal medication unless you are told otherwise.
  • If you are diabetic please tell the radiology department.
  • It’s helpful if you bring any previous x-rays with you.

Why use ultrasound and not MRI?

Ultrasound and MRI are complimentary imaging procedures. Some situations require MRI, some are more appropriate for ultrasound.

Ultrasound is quick, painless and not restricted by metal work within the body, such as pacemakers and is suitable for those patients who find the MRI scanner too claustrophobic.  However ultrasound is limited by its small field of view, the inability to image through dense bone or air and the images are often compromised by obesity. Therefore it is not appropriate in all situations.

Results of the scan

A written report will be sent to your referring doctor for your discussion at a follow up appointment.

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