CT Scan

What is a Computerised Tomography (CT) Scan?

A Computerised Tomography (CT) scanner is a special kind of X-ray machine. Instead of sending out a single X-Ray through your body as with ordinary X-Ray, several beams are sent simultaneously from different angles. Thus the result of Computerised Tomography (CT) scan is much more detailed compare to X-Ray.

How does a Computerised Tomography (CT) scanner work?

The X-Ray from the beams are detected after they have passed through the body and their strength is measured.
Beams that have passed through less dense tissue such as the lungs will be stronger, whereas beams that have passed through denser tissue such as bone will be weaker.
A computer can use this information to work out the relative density of the tissues examined.

How is a Computerised Tomography (CT) scan carried out?

During the scan the patient lies on a bed, with the body part under examination placed in the opening of the scanner. The bed then moves slowly backwards and forwards to allow the scanner to take pictures of the body. The length of the test depends on the number of pictures and the different angles taken.

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