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Volume 13
Issue 16
10.3390/app13169182
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Article

Evaluation of Lens Doses among Medical Staff Involved in Nuclear Medicine: Current Eye Radiation Exposure among Nuclear-Medicine Staff

by
Masaki Fujisawa
1,2,
Yoshihiro Haga
1,3,
Masahiro Sota
1,3,
Mitsuya Abe
3,
Yuji Kaga
3,
Yohei Inaba
1,4,
Masatoshi Suzuki
1,4,
Taiichiro Meguro
5,
Yoshio Hosoi
2 and
Koichi Chida
1,4,*
1
Course of Radiological Technology, Health Sciences, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
2
Department of Radiation Biology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan
3
Department of Radiology, Sendai Kousei Hospital, Sendai 980-0873, Japan
4
Department of Radiation Disaster Medicine, International Research Institute of Disaster Science, Tohoku University, Sendai 980-0845, Japan
5
Department of Cardiovascular Medicine, Sendai Kousei Hospital, Sendai 980-0873, Japan
*
Author to whom correspondence should be addressed.
Appl. Sci. 2023, 13(16), 9182; https://doi.org/10.3390/app13169182
Submission received: 30 June 2023 / Revised: 28 July 2023 / Accepted: 9 August 2023 / Published: 12 August 2023
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Abstract

The International Commission on Radiological Protection has lowered the annual equivalent eye-lens dose to 20 mSv. Although occupational exposure can be high in nuclear medicine (NM) departments, few studies have been conducted regarding eye-lens exposure among NM staff. This study aimed to estimate the annual lens doses of staff in an NM department and identify factors contributing to lens exposure. Four nurses and six radiographers performing positron emission tomography (PET) examinations and four radiographers performing radioisotope (RI) examinations (excluding PET) were recruited for this study. A lens dosimeter was attached near the left eye to measure the 3-mm-dose equivalent; a personal dosimeter was attached to the left side of the neck to measure the 1-cm- and 70-µm-dose equivalents. Measurements were acquired over six months, and the cumulative lens dose was doubled to derive the annual dose. Correlations between the lens and personal-dosimeter doses, between the lens dose and the numbers of procedures, and between the lens dose and the amounts of PET drugs (radiopharmaceuticals) injected were examined. Wilcoxon’s signed-rank test was used to compare lens and personal-dosimeter doses. The estimated annual doses were 0.93 ± 0.13 mSv for PET nurses, 0.71 ± 0.41 mSv for PET radiographers, and 1.10 ± 0.53 mSv for RI radiographers. For PET nurses, but not for PET or RI radiographers, there was a positive correlation between the numbers of procedures and lens doses and between amounts injected and lens doses. There was a significant difference between the lens and personal-dosimeter doses of PET nurses. The use of protective measures, such as shielding, should prevent NM staff from receiving lens doses > 20 mSv/year. However, depending on the height of the protective shield, PET nurses may be unable to assess the lens dose accurately using personal dosimeters.
Keywords: radiation protection and safety; nuclear medicine; positron emission tomography (PET); radioisotope (RI) examination; single-photon emission computed tomography (SPECT); eye-lens dose; nurse; occupational radiation exposure; radiographer; disaster medicine radiation protection and safety; nuclear medicine; positron emission tomography (PET); radioisotope (RI) examination; single-photon emission computed tomography (SPECT); eye-lens dose; nurse; occupational radiation exposure; radiographer; disaster medicine

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MDPI and ACS Style

Fujisawa, M.; Haga, Y.; Sota, M.; Abe, M.; Kaga, Y.; Inaba, Y.; Suzuki, M.; Meguro, T.; Hosoi, Y.; Chida, K. Evaluation of Lens Doses among Medical Staff Involved in Nuclear Medicine: Current Eye Radiation Exposure among Nuclear-Medicine Staff. Appl. Sci. 2023, 13, 9182. https://doi.org/10.3390/app13169182

AMA Style

Fujisawa M, Haga Y, Sota M, Abe M, Kaga Y, Inaba Y, Suzuki M, Meguro T, Hosoi Y, Chida K. Evaluation of Lens Doses among Medical Staff Involved in Nuclear Medicine: Current Eye Radiation Exposure among Nuclear-Medicine Staff. Applied Sciences. 2023; 13(16):9182. https://doi.org/10.3390/app13169182

Chicago/Turabian Style

Fujisawa, Masaki, Yoshihiro Haga, Masahiro Sota, Mitsuya Abe, Yuji Kaga, Yohei Inaba, Masatoshi Suzuki, Taiichiro Meguro, Yoshio Hosoi, and Koichi Chida. 2023. "Evaluation of Lens Doses among Medical Staff Involved in Nuclear Medicine: Current Eye Radiation Exposure among Nuclear-Medicine Staff" Applied Sciences 13, no. 16: 9182. https://doi.org/10.3390/app13169182

APA Style

Fujisawa, M., Haga, Y., Sota, M., Abe, M., Kaga, Y., Inaba, Y., Suzuki, M., Meguro, T., Hosoi, Y., & Chida, K. (2023). Evaluation of Lens Doses among Medical Staff Involved in Nuclear Medicine: Current Eye Radiation Exposure among Nuclear-Medicine Staff. Applied Sciences, 13(16), 9182. https://doi.org/10.3390/app13169182

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