Discussion on Modified Methods of the Absorbed Dose to Water from ¹²⁵I Seed Sources

Radioactive Particle implantation is a treatment by using radioactive rays to destroy the tumor. It's need to plant the radioactive particle in clinical practice, and ensure the reasonableness of the dose distribution. The modified method was introduced that could modify the absorbed dose to water from ¹²⁵I seed sources, and provided guidance to ensure the implantable position and radioactive dose. At a distance of 5 mm to ¹²⁵I surface, the result indicated that the modified value was 1.3 times of the original value. The impact gradually gets smaller by increasing with distance. The result shown that it's necessary to modify the absorbed dose to water from ¹²⁵I seed sources.