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CC BY-NC-ND 4.0 · World J Nucl Med 2017; 16(02): 150-155
DOI: 10.4103/1450-1147.203078
Original article

An evaluation of deviation from the international atomic energy agency-international commission on radiological protection proposed equation for calculation of radiation dose rate emanating from the patients with differentiated thyroid cancer undergoing radioiodine (I-131) therapy

Forough Dehkordi
Persian Gulf Nuclear Medicine Research Center, Bushehr University of Medical Sciences, Bushehr
,
Behrouz Rasuli
1   Department of Radiology Technology, Behbahan Faculty of Medical Sciences, Behbahan
,
Ali Mahmoud-Pashazadeh
Persian Gulf Nuclear Medicine Research Center, Bushehr University of Medical Sciences, Bushehr
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The main purpose of this study was to investigate dose rate emanating from patients treated with 131I to evaluate which of the theoretical formulas, inverse-square law (ISL) and International Atomic Energy Agency-International Commission on Radiological Protection (IAEA-ICRP) suggested equation, can provide a sufficiently close approximation of the measured dose rate. Measurements were performed based on the IAEA safety report No. 63 method at 0, 12, 24, and 48 h after administration of radioiodine at a distance of 1 m for 69 patients and for the rest of 67 patients, dose rate was measured at 2, 4, 24, and 48 h at a distance of 2 m. Results revealed that the ISL formula gained better approximation of measured dose rates than the IAEA-ICRP equation with the lesser error. The ISL formula is still more reliable than the novel method of dose calculation in the vicinity of patients. This finding reminded us the prime importance of distance as a radiation protection principle.

Keywords

Differentiated thyroid cancer - inverse square law - iodine therapy - radiation protection


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Artikel online veröffentlicht:
18. Mai 2022

© 2017. Sociedade Brasileira de Neurocirurgia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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