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A PET/CT scan uses two different forms of medical imaging at the same time.
Positron Emission Tomography (PET) is a medical imaging technique in which a small amount of a radioactive tracer given to the patient, normally by injecting it into a vein. The most commonly used tracer in PET is a radioactive form of glucose. The scan shows how the body breaks down and uses glucose. Cancer cells use glucose differently and this will show up on the scan.
A CT (Computerised Tomography) scan uses x-rays to produce images of the body.
Prevention and surveillance
By combining PET and CT, we are able to provide important information about many conditions affecting the different organs of the body. This will help your doctor to plan appropriate treatment.
The amount of radiation in the tracer and is equivalent to the radiation you are exposed to when you have an x-ray. The benefits of the scan far outweigh any potential risk from the radiation. The tracer will not produce any side effects. In particular, it will not make you drowsy and you will be able to drive after your appointment.