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A Computerised Tomography (CT) scanner uses x-rays to produce images of various parts of the body. The images are produced from a block of data which the scanner acquires in one breath hold. These are turned into cross sectional images, like the slices of a loaf of bread. When the image slices are reassembled by computer, the result is a very detailed, multidimensional view of the body's interior.
CT scans are investigations that can be used to help to make a diagnosis or assess the effects of treatment. Your doctor will recommend a CT scan based on the type of cancer you have and the information needed to plan your treatment.
CT scanners use x-rays at the lowest practical radiation dose. The benefits of having a CT scan and the information obtained from the scan compared to the risk of exposure to radiation will be weighed up by your doctor before deciding to send you for the scan. If you have any queries about this, please speak to your doctor.
CT scans are not suitable for pregnant women. Please contact the CT department before your scan if you think there is any possibility you may be pregnant.
Prevention and surveillance