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Positron-emission tomography (PET) with intravenously injected 18F-fluorodeoxyglucose (18F-FDG) provides ‘functional’ images of cellular glucose metabolism (FDG-PET). Integrated CT provides additional ‘anatomical’ images of the body’s X-ray attenuation (FDG-PET/CT).1 For diagnosis, FDG-avid foci are visually identified on the PET images, their 18F-FDG uptake can be semiquantitatively measured for instance by the maximum standardised uptake value (SUVmax), and the foci are matched to anatomical structures using the coregistered CT images.1 Some 18F-FDG is also excreted by the urinary tract, which must be considered. FDG-PET/CT is predominately used for whole-body tumour staging, but has further indications such as searching infectious foci. In the following, specific properties of …
Contributors JM is the guarantor of the study and is responsible for the overall content. All authors contributed to conception and design of the work, interpreted clinical data, drafted the article and revised it critically for important intellectual content, and approved the final version to be published.
Competing interests None.
Patient consent Obtained.
Ethics approval Ethics Committee of the University Hospital Goettingen.
Provenance and peer review Not commissioned; externally peer reviewed.