Performance assessment and uncertainty evaluation of a portable NaI-based detection system used for thyroid monitoring

Radiation Protection Dosimetry
J BentoM Zankl

Abstract

This work aims at assessing the performance of a portable detection system, equipped with an NaI(Tl) scintillation detector for in vivo thyroid monitoring, which was properly calibrated using an anthropomorphic neck phantom. The anthropomorphic physical phantoms commonly used for the efficiency calibration of in vivo counters often present certain limitations regarding the geometry and the activity distribution. Therefore, the feasibility of these detection systems for in vivo monitoring should be assessed whenever possible. To accomplish this assessment, patients to whom (99m)Tc and (123)I marked radiopharmaceuticals have been administered in the framework of nuclear medicine diagnostic procedures were monitored. As the biokinetic models of the administered radiopharmaceuticals are known, the time-dependent activity functions in the critical organs after administration are easily quantified. The measured activities in the thyroid using the NaI(Tl) scintillation detector were compared with the estimated activities using the biokinetic models, in order to reach conclusion about the applicability of the portable scintillation counter for in vivo thyroid monitoring. The state-of-the-art Monte Carlo computer program PENELOPE and tw...Continue Reading

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Citations

Mar 27, 2018·Journal of Radiological Protection : Official Journal of the Society for Radiological Protection·Tiffany BeaumontDidier Franck
May 16, 2019·Radiation Protection Dosimetry·Akira Yunoki

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