A simple, reliable and accurate approach for assessing [I]-capsule activity leading to significant reduction of radiation exposure of medical staff during radioiodine therapy.

Purpose: According to German law, the [I]-capsule activity has to be checked in the context of radioiodine therapy (RIT) immediately before application. The measurement leads to significant radiation exposure of the medical personnel, especially of their hands. We aimed to establish a method for estimating [I]-capsule activity by measuring the dose rate (DR) at contact of the delivered lead closed container carrying the [I]-capsules and to evaluate radiation exposure in comparison to conventional [I]-capsule measurement using a dose calibrator.