Treatment Choice - Treatment Choice | Compare Prices | Find Hospital | A computerised tomography (CT) scan uses X-rays and a computer to create detailed images of the inside of the body. <br/>CT scans are also sometimes known as CAT scans, or computed tomography scans.<br/>During a CT scan, you'll usually lie on your back on a flat bed. The CT scanner consists of an X-ray tube that rotates around your body. You'll usually be moved continuously through this rotating beam.<br/>The X-rays will be received by a detector on the opposite side of your body and an image of the scan will be produced by a computer.<br/>Unlike an MRI scan, where you're placed inside a tunnel, you shouldn't feel claustrophobic.<br/>The images produced by a CT scan are called tomograms and are more detailed than standard X-rays. A CT scan can produce images of structures inside the body, including the internal organs, blood vessels, bones and tumours.<br/>The scan is painless and will usually take between five and 10 minutes depending on the part of your body being scanned.