A scan which measures the Brain activity
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Technology has made things easy and we can easily scan the human brain with PET (Positron Emission Tomography)
Before a PET scan begins, a patient is given a safe dose of a radioactive tracer compound. To measure brain activity, doctors and scientists use FDG (fluorodeoxyglucose), which is a modified glucose molecule
This scan helps to look into the brain for disease, chemicals and even drugs
https://learn.genetics.utah.edu/content/neuroscience/brainimaging/
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