Radiotracers used in Positron Emission Tomography (PET) are chemical compounds comprising more than one atom replaced by a radioisotope. PET radiotracers are administered intravenously. Radiotracers are used for tracking the mechanism of chemical reactions taking part in a biological system, such as, glucose metabolism, amino acid uptake, glucocorticoid synthesis, and other metabolic studies. There are several types of radiotracers used in PET for metabolic studies for visualization using PET imaging.
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Source: News Stoner