Why is it necessary? of PET scan

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In many cases, PET scanning is used to either detect disease or to find out how widespread a disease is within a patient. PET scanning is commonly used for conditions such as epilepsy, Alzheimerâ€™s disease and cancer.

In epilepsy, PET scanning can tell which part of the brain is affected, and whether the patient is suitable for certain treatments. In Alzheimerâ€™s disease, the PET scan can be used to obtain an accurate diagnosis. Cancer specialists use PET scanning to locate growths, to tell whether a growth is cancerous, and whether the cancer has spread to other parts of the body.

PET scans are also used for research into how the body works, and to understand what happens when things go wrong. Areas studied include brain function and learning disabilities, in addition to the effects of stress, drug abuse and the ageing process.

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