Most PET scanners are combined with CT scanners, as in this PET-CT machine, in order to provide hybrid imaging that utilises the best of both types of imaging. — Filepic
Not to be confused with creatures that we keep as pets, the similarly-named PET scan is an imaging modality used in the medical field.
What is a PET scan (or simply PET) and why is it necessary?
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The abnormal distribution of the radiotracer in this PET scan image of a patient with left lung cancer (the dark spots within the red circles) allows easier and faster identification of the cancer. The other dark areas are normal parts of the body and can be easily distinguished by nuclear medicine physicians.
This subsequent PET scan image shows that the abnormal distribution of radiotracer within the larger red circle has reduced, while there is no longer any within the smaller red circle, after the patient has undergone chemotherapy.
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