A cost-effective way to reduce the equivalent eye lens dose fromYttrium-90 radiopharmaceuticals

Susie Medeiros Oliveira; Sylvia Thomas; Lidia Vasconcellos de Sá; Mirta Barbara Torres Berdeguez; Claudia Lucia Pinho Mauricio; Sergio Augusto Lopes de Souza

doi:10.1016/j.zemedi.2020.09.006

A cost-effective way to reduce the equivalent eye lens dose fromYttrium-90 radiopharmaceuticals

Z Med Phys. 2021 Feb;31(1):16-22. doi: 10.1016/j.zemedi.2020.09.006. Epub 2020 Nov 13.

Authors

Susie Medeiros Oliveira¹, Sylvia Thomas¹, Lidia Vasconcellos de Sá¹, Mirta Barbara Torres Berdeguez¹, Claudia Lucia Pinho Mauricio¹, Sergio Augusto Lopes de Souza²

Affiliations

¹ Universidade Federal do Rio de Janeiro, Hospital Universitário Clementino Fraga Filho, Departamento de Radiologia - Sub-solo, Rua Professor Rodolpho Rocco, 255, Ilha do Fundão - CEP: 21941-913, Rio de Janeiro, RJ, Brazil.
² Universidade Federal do Rio de Janeiro, Hospital Universitário Clementino Fraga Filho, Departamento de Radiologia - Sub-solo, Rua Professor Rodolpho Rocco, 255, Ilha do Fundão - CEP: 21941-913, Rio de Janeiro, RJ, Brazil. Electronic address: sergioalsouza@gmail.com.

PMID: 33191067
DOI: 10.1016/j.zemedi.2020.09.006

Abstract

Purpose: We analyzed the effect of the use of Eye Protective Equipment (EPE) and the best position to use individual dosimeters to estimate the eye lens radiation dose to a medical staff that works with yttrium-90.

Methods: Three Alderson-Head-Phantoms were exposed to 58MBq of ⁹⁰Y for 24h, in two different experiments: (1) at different dosimeter placements and (2) with and without the use of EPE. The measurements were carried on by thermoluminescent technique.

Results: Doses received by dosimeters on both lenses were more closely represented by the ones placed between the eyes than those on the temples, which underestimated the doses by a factor of 3. Also, the transmission factors showed that the EPE was able to reduce the H_p(3) values from about 78% to 92%.

Conclusions: This study demonstrated that the use of EPE can optimize the ⁹⁰Y eye lens dose. An individual dosimeter should be worn between the eyes for an appropriate estimate of this equivalent dose.

Keywords: Eye protective equipment; Radiation dose; Yttrium-90.

MeSH terms

Cost-Benefit Analysis*
Lens, Crystalline / radiation effects*
Radiation Dosage*
Radiopharmaceuticals*
Yttrium Radioisotopes*

Substances

Radiopharmaceuticals
Yttrium Radioisotopes
Yttrium-90