Positron emission tomography (PET) scan of the brain (basal ganglia level) of a normal human subject. The colour-coded scan through this cerebral layer shows brain activity: from low (blue) to high (yellow). PET scanning relies on a radioactive tracer,injected into the bloodstream,to reveal metabolic activity in the brain. As seen here,normal brain metabolic activity produces a roughly symmetrical pattern in the yellow areas of left and right cerebral hemispheres. In many brain dysfunctions (such as Alzheimer's disease,epi- lepsy and schizophrenia),PET scans are useful in pinpointing specific brain areas which are meta- bolically affected by disease | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Beddow, Tim |
Bildgröße: | 3543 px × 2596 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |