Isotope

Iodine-125 is a radioactive isotope of iodine which is used in radiation therapy to treat prostate, lung, and cancer. Its half-life is around 60 days and it emits gamma-rays with maximum energies of 35 keV, some of which are internally converted to x-rays.

Uses

• Prostate Cancer
• Lung Cancer
• Brain Cancer
• Eye Plaques

Iodine-125 in Prostate Cancer Brachytherapy

Iodine 125 is used in permanent radiation brachytherapy.

Manufacturers of Iodine-125 sources

• Bard Urological
• Best Medical
• Brachytherapy Services
• Theragenics
• IsoAid
• IBt-Bebig

AAPM Source Registry

Literature

• Experimental and theoretical dosimetry of a new polymer encapsulated iodine-125 source—SmartSeed: Dosimetric impact of fluorescence x rays
• Evaluation of the dose distribution for prostate implants using various ¹²⁵I and ¹⁰³Pd sources