Depression: 2 axial PET scans of the brain

Depression: 2 axial PET scans of the brain

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Credit: U.S. NATIONAL INSTITUTE OF HEALTH/SCIENCE PHOTO LIBRARY

Caption: Depression. Two axial PET scans of the brain, comparing a normal subject (top) with a person suffering from a depressive illness. The depressed patient shows lowered brain activity. PET scans (Positron Emission Tomography) obtain details of the function of tissues using tracers labelled with a short-lived radioisotope. Here, a glucose analogue labelled with oxygen-11 is injected into the bloodstream immediately prior to taking the scan, crossing the blood-brain barrier to participate in glucose metabolism in the brain. Positrons emitted are detected and data processed to provide the colour-coded images.

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Keywords: brain, brain scan, condition, depression, depression and normal, disease, disorder, healthcare, medical, medicine, neuroimaging, pet, pet scan

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