%0 Journal Article %A Michael T. Hackett %A Nicolaos Perdikaris %A Theandres T. Ruffin %T Additional Radiation Safety Concerns Involving Sodium Iodide-131 Capsules %D 1995 %J Journal of Nuclear Medicine Technology %P 289-290 %V 23 %N 4 %X Objective: We studied the extent of 131I contamination within absorbent packets of activated carbon that are enclosed in one manufacturer’s packaging of 131I therapeutic capsules. Methods: Iodine-131 activity within the absorbent packets of ten 131I capsules was measured 3–5 min after opening each container and over a one workday period. Results: Initial 1311 activity of the absorbent packets ranged from 0.1% to 1.0% of the activity of the respective 131I capsules. Follow-up measurements demonstrated rapid release of 131I. Conclusion: Absorbent packets used in the packaging of 1311 capsules are a source of 131I contamination. They must be handled and stored properly to minimize potential internal exposure to the nuclear medicine staff. %U https://tech.snmjournals.org/content/jnmt/23/4/289.full.pdf