Radiology Lexicon

Last uploaded: December 1, 2025
Id http://www.radlex.org/RID/RID10337
http://www.radlex.org/RID/RID10337
Preferred Name

positron emission tomography

Definitions
An imaging technique using compounds labelled with short-lived positron-emitting radionuclides (such as carbon-11, nitrogen-13, oxygen-15 and fluorine-18) to measure cell metabolism. It has been useful in study of soft tissues such as cancer; cardiovascular system; and brain. SPECT is closely related to PET, but uses isotopes with longer half-lives and resolution is lower. [MeSH]
Synonyms
PET
Type http://www.w3.org/2002/07/owl#Class
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