Positron Emission Tomography (PET)
The radioactive tracers injected into the patient will emit positrons, which can be detected by a PET camera. This provides a reconstruction of the relevant organ and its metabolism; a highly practical and potentially life-saving procedure in brain scans, heart scans and mainly the screening of cancers. The entire scan takes around 30 minutes in cardiology, but can last for several hours when the entire body is scanned - as is the case in the search for metastasis.
C.Boulze/CEA