Elements and Compounds

What are some uses of radioisotopes?



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Radioisotopes can be picked up by PET scans, & so they're used in some medical investigations; here are two examples: # Radioisotopes injected into the blood stream to show which parts of the brain are most active (& therefore demand the greatest supply of blood) during a certain task. # A radioisotope attached to a molecule (e.g. a drug) which is known to bind only to certain receptor sites in the body; the PET scan can show where those receptor sites are, or whether there are the expected number of such sites present.