Positron Emission of Fluorine-18 (PET Scan)

18F → 18O + e+ + νe

Aperçu

Fluorine-18 undergoes positron emission to become oxygen-18 with a half-life of 109.8 minutes. The emitted positron annihilates with an electron, producing two 511 keV gamma rays in opposite directions. This annihilation radiation is detected in PET (positron emission tomography) scanners.

Participants

Rôle Substance Coefficient État
Réactif Fluorine F 1 (s)
Produit Oxygen O 1 (g)

Exemple du quotidien

PET scans using F-18 labeled glucose (FDG) detect cancer by showing areas of high metabolic activity that consume more glucose than normal tissue.

Importance industrielle

F-18 FDG PET is the gold standard for cancer staging, treatment monitoring, and neurological imaging. Over 2 million PET scans are performed annually in the US.

Propriétés

Type
Nuclear
Réversible
Non
Énergie
Exothermique
ΔH
-64000000,0 kJ/mol

Réactions associées

Alpha Decay of Radium-226 Alpha Decay of Radon-222 Alpha Decay of Thorium-232 Neutron Capture by Uranium-238 Beta Decay of Iodine-131 Beta Decay of Strontium-90 Alpha Decay of Polonium-210 Americium-241 Alpha Decay Beta Decay of Cobalt-60 Electron Capture by Beryllium-7

Frequently Asked Questions

What is the equation for Positron Emission of Fluorine-18 (PET Scan)?
The balanced equation is: ¹⁸F → ¹⁸O + e⁺ + νₑ.
What type of reaction is Positron Emission of Fluorine-18 (PET Scan)?
Positron Emission of Fluorine-18 (PET Scan) is a nuclear reaction.
Is Positron Emission of Fluorine-18 (PET Scan) exothermic or endothermic?
Positron Emission of Fluorine-18 (PET Scan) is exothermic (releases energy). The enthalpy change (ΔH) is -64000000.0 kJ/mol.