Age-Specific Experimental and Computational Calibration of Thyroid in vivo Monitoring

T. Beaumont (1) , Dago Pacôme Onoma (1) , Maeva Rimlinger (1) , David Broggio (1) , Pedro Caldeira Ideias (2) , Didier Franck (3)

1 IRSN/PSE-SANTE/SDOS/LEDI - Laboratoire d'évaluation de la dose interne
2 IRSN/PSE-ENV/SIRSE/LSE - Laboratoire de surveillance de l'environnement par échantillonnage
3 IRSN/PSE-SANTE/SDOS - Service de dosimétrie

Age-specific thyroid phantoms corresponding to 5, 10, 15 years-old and the adult case have been designed and manufactured with a 3-D printer. Reference measurements of the counting efficiency have been carried out for thyroid in vivo monitoring of 131 I with all these phantoms. These measurements were performed for the emergency mobile units of Institut de Radioprotection et de Sûreté Nucléaire. The full efficiency curve, between 29 and 1000 keV, was then obtained by Monte-Carlo calculations and validated by comparison of a large set of measurements. The obtained efficiency curves are consistent and show that the relative difference in efficiency between the adult and the children case are energy dependent.

Mots clés: Monte-Carlo; in vivo measurement; thyroid; phantom; children

Domaines: Physique [physics]

T. Beaumont, Dago Pacôme Onoma, Maeva Rimlinger, David Broggio, Pedro Caldeira Ideias, et al.. Age-Specific Experimental and Computational Calibration of Thyroid in vivo Monitoring. IEEE Transactions on Radiation and Plasma Medical Sciences, 2019, 3 (1), pp.43-46. ⟨10.1109/TRPMS.2018.2829931⟩. ⟨irsn-04021252⟩