Positron Emission of Fluorine-18 (PET Scan)

18F → 18O + e+ + νe

概述

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.

参与者

角色 物质 系数 状态
反应物 Fluorine F 1 (s)
产物 Oxygen O 1 (g)

日常示例

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

工业重要性

¹⁸F-FDG PET是癌症分期诊断的金标准，全球每年进行数百万次PET检查，是核医学影像的主流技术。

属性

类型
Nuclear
可逆
否
能量
放热
ΔH
-64000000.0 kJ/mol

相关反应

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.