A study on the use of modified extremity dosemeters for the measurement of H(3,α)

Dubeau, J.; Sun, Jiancheng; Leroux, N.; Atanackovic, J.; Dauer, Lawrence T.; Witharana, Sampath S. Hakmana; Hanu, Andrei R.

doi:10.1016/j.radmeas.2020.106491

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…In addition, Dubeau et al ( 58 ) found for neutron eye lens dosimetry, that a selection of commercially available passive neutron dosimeters exists, however their ability to accurately measure neutron eye lens dose has yet to be evaluated. Another study by Dubeau et al ( 61 ) tested the response of five commercially available skin dosimeters each covered by a 300 mg cm –2 thick layer of polycarbonate. It was found that these dosimeters provide accurate readings of H p (3) for photon and beta radiation incident with a variety of angles and energy.…”

Section: Discussionmentioning

confidence: 99%

Electron, Photon, and Neutron Dose Conversion Coefficients of Lens and Non-Lens Tissues Using a Multi-Tissue Eye Model to Assess Risk of Cataracts and Retinitis

Ali

Richardson

2023

Radiation Research

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Previous publications describe the estimation of the dose from ionizing radiation to the whole lens or parts of it but have not considered other eye tissues that are implicated in cataract development; this is especially critical for low-dose, low-ionizing-density exposures. A recent review of the biological mechanisms of radiation-induced cataracts showed that lenticular oxidative stress can be increased by inflammation and vascular damage to non-lens tissues in the eye. Also, the radiation oxygen effect indicates different radiosensitivities for the vascular retina and the severely hypoxic lens. Therefore, this study uses the Monte Carlo N-Particle simulations to quantify dose conversion coefficients for several eye tissues for incident antero-posterior exposure to electrons, photons, and neutrons (and the tertiary electron component of neutron exposure). A stylized, multi-tissue eye model was developed by modifying a model by Behrens etal. (2009) to include the retina, uvea, sclera, and lens epithelial cell populations. Electron exposures were simulated as a single eye, whereas photon and neutron exposures were simulated employing two eyes embedded in the ADAM-EVA phantom. For electrons and photons, dose conversion coefficients are highest for either anterior tissues for low-energy incident particles or posterior tissues for high-energy incident particles. Neutron dose conversion coefficients generally increase with increasing incident energy for all tissues. The ratio of the absorbed dose delivered to each tissue to the absorbed dose delivered to the whole lens demonstrated the considerable deviation of non-lens tissue doses from lens doses, depending on particle type and its energy. These simulations demonstrate that there are large variations in the dose to various ocular tissues depending on the incident radiation dose coefficients; this large variation will potentially impact cataract development.

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Section: Discussionmentioning

confidence: 99%

Electron, Photon, and Neutron Dose Conversion Coefficients of Lens and Non-Lens Tissues Using a Multi-Tissue Eye Model to Assess Risk of Cataracts and Retinitis

Ali

Richardson

2023

Radiation Research

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“…It is based on CNL's extremity dosimeter, a thin LiF-loaded PTFE disk, covered with 300 mg cm −2 of low-Z material. It has been demonstrated that LiF-loaded PTFE disk used in conjunction with adequate filtration (300 mg cm −2 ), appears to provide fairly accurate H p (3) dose responses to many fields of beta and gamma radiations investigated (Dubeau et al 2021a).…”

Section: Eye Lens Dose Hazards and Dosimetry At The Canadian Nuclear ...mentioning

confidence: 99%

“…A European Radiation Dosimetry Group intercomparison study of commercial eye lens dosimeters showed that, while the performances were generally satisfactory for photon radiation, further improvement in the beta response was required (Clairand et al 2018). In other work, five models of H p (0.07) dosimeters were tested with a complement of 300 mg cm −2 filtration and they appeared to offer fairly accurate H p (3) energy and angular responses for photons and beta particles (Dubeau et al 2021a). Potential users of these and other technologies should demonstrate that they provide accurate eye lens dosimetry, applicable to their respective workplace radiation fields.…”

Section: Direct Measurements With Passive Dosimetersmentioning

confidence: 99%

Current status of eye-lens dosimetry in Canada

Dubeau¹,

Sun²,

Djeffal³

et al. 2022

J. Radiol. Prot.

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For occupational exposures in planned exposure situations International Commission on Radiological Protection (ICRP) publication 118 recommends an equivalent dose limit for the lens of the eye of 20 mSv yr−1 averaged over five years with no single year exceeding 50 mSv. This constitutes a reduction from the previous limit of 150 mSv yr−1. The Canadian nuclear regulator, the Canadian Nuclear Safety Commission, responded to the ICRP recommendation by initiating amendments to the Radiation Protection Regulations through a discussion paper which was published for comment by interested stakeholders in 2013. The revised equivalent dose limit of 50 mSv in a one-year dosimetry period for nuclear energy workers came into effect in January 2021. This paper presents the outcome of discussions with Canadian stakeholders in diverse fields of radiological work which focused on the implementation of the reduced occupational equivalent dose limit for the lens of the eye in their respective workplaces. These exchanges highlighted the existing practices for monitoring doses to the lens of the eye and identified current technological gaps. The exchanges also identified that, in many cases, the lens of the eye dose is anticipated to be well within the new dose limit despite some of the gaps in technology. The paper also presents the monitoring and eye-lens dose assessment solutions that are available based on different methods for eye-lens monitoring; presented together with criteria for their use.

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A preliminary evaluation of the implementation of a radiation protection program for the lens of the eye in Korean nuclear power plants

Kong

Kim

Cho

et al. 2021

Nuclear Engineering and Technology

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A study on the use of modified extremity dosemeters for the measurement of H(3,α)

Cited by 6 publications

References 7 publications

Electron, Photon, and Neutron Dose Conversion Coefficients of Lens and Non-Lens Tissues Using a Multi-Tissue Eye Model to Assess Risk of Cataracts and Retinitis

Electron, Photon, and Neutron Dose Conversion Coefficients of Lens and Non-Lens Tissues Using a Multi-Tissue Eye Model to Assess Risk of Cataracts and Retinitis

Current status of eye-lens dosimetry in Canada

A preliminary evaluation of the implementation of a radiation protection program for the lens of the eye in Korean nuclear power plants

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