All A to Z Topics

Computerised tomography

A computerised tomography (CT) scan, also known as a CAT scan, uses X-rays and a computer to create detailed images of the inside of the body.
When CT scans are used
Computerised tomography (CT) scans provide information that doctors can use to help diagnose medical conditions.
How CT scans are performed
Before having a computerised tomography (CT ) scan, you'll be asked about any existing health conditions, whether you are taking any medication, and if you have any allergies.
Risks of a CT scan
If you have a computerised tomography (CT) scan, you'll be exposed to radiation in the form of X-rays. The amount of radiation used can vary.