The radioactive isotope (radiotracer) accumulates in areas where there is a high level of chemical or metabolic activity – these are called ‘hot spots’. Hot spots can be used to identify uncontrolled over-production of cells caused by cancer or other inflammatory processes.
If there is reduced activity in areas of your body, there will be lower amounts of radiotracer – these are called ‘cold spots’. These cold spots can be used to identify organs, glands, or other parts of your body that are not functioning properly.
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