PET scan (positron emission tomography) of an axial section through a normal human brain. PET scans are obtained by injecting a tracer labelled with a short-lived radioactive isotope into the bloodstream,which concentrates in brain & emits positrons that are recorded by a circular detector when the scan is performed. Here,radioactive methionine (an amino acid) has been used to show the level of activity of protein synthesis in the brain | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / CNRI |
Taille de l’image : | 5071 px × 3761 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |