What are chemical particles in medical treatment?

Radioactive iodine particles. "Chemical particles in medical treatment" are radioactive iodine particles, also known as iodine 125 particle implantation, which is a small radioactive particle implanted into human body to treat tumors. The main body of this small particle is radioactive iodine 125 isotope plated on the surface of silver wire, which is wrapped by a thin titanium alloy tube.