Introduction Iodine-125 (125I) seed implantation delivers continuous low-dose radiation to tumor tissue and has been used to treat selected primary and metastatic malignancies. Clinical applications include hepatobiliary and pancreatic malignancies, thoracic tumors, and malignancies of the urinary system.1,2 Recently, concerns about the safety of this technique regarding radiation exposure have increased.3,4 Adequate radiation protection measures are crucial to mitigate these risks.
