Positron Emission of Fluorine-18 (PET Scan)

¹⁸F → ¹⁸O + e⁺ + ν_e

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Chất phản ứng	Fluorine F	1	(s)
Sản phẩm	Oxygen O	1	(g)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

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.

Tính chất

Loại: Nuclear
Thuận nghịch: Không
Năng lượng: Tỏa nhiệt
ΔH: -64000000,0 kJ/mol

Phản ứng liên quan

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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.