What is a pet scan ?

it is a test conducted in diagnosis of cancer.

Positron emission tomography (PET) is a highly specialized imaging technique using short-lived radiolabeled substances to produce powerful images of the body's biological function.

PET is especially useful in the context of cancer because it can detect metastatic tumors that may not be visualized by other imaging techniques. It is also being increasingly used not only as a cancer diagnostic tool, but also to help physicians design the most beneficial therapies. For example, it may be used to assess response to chemotherapy. PET imaging is very accurate in differentiating malignant from benign cell growths, and in assessing the spread of malignant tumors. PET is also used to detect recurrent brain tumors and cancers of the lung, colon, breast, lymph nodes, skin, and other organs.

Besides being used to investigate the metabolism of normal organs, PET has also become the technique of choice to investigate various neurological diseases and disorders, including stroke, epilepsy, Alzheimer's disease, Parkinson's disease, and Huntington's disease. Various psychiatric disorders, such as schizophrenia, depression, obsessive-compulsive disorder, attention-deficit/hyperactivity disorder, and Tourette syndrome, are also imaged by PET.-

http://en.wikipedia.org/wiki/Positron_em...

here you are lots of detail

I guess u are mispelling CET SCAN which done for cancer and is called coaxial tomography which does scanning throughout the body or axis of ur body.

Basically PET scan uses radioactive isotopes which are absorbed by cancer tumors or cells, when scanned the tumors or cancer cells light up.

A pet scan has nothing RI do with animals.Lol a pet scan is something is along the same lines as an MRI. I not sure exactly what there looking for when this is done but no animals are involved.

This link to Cancer Research UK gives plenty of information on Positron Emission Tomography (PET) scans

http://www.cancerhelp.org.uk/help/defaul...

if you scan a Cat it becomes pet scan. Catscan done for diagnosiscan also be named as pet scan because you have cat there.