Positron emission tomography ( PET) scans areusedto produce detailed three-dimensional imagesof the inside of the body.

The images can clearly show the part of the body being investigated, including any abnormal areas, and can highlight howwell certain functions of the body are working.

PET scans are often combined with computerised tomography (CT) scans to produce even more detailed images. This is known as a PET-CT scan.

They may also occasionally be combined with a magnetic resonance imaging (MRI) scan . This is known as a PET-MRI scan.

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Medically Reviewed by a doctor on 28 Nov 2016