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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / US National Institute of Health |
Taille de l’image : | 3206 px × 4935 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
|