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Research ArticleRadiation Safety

Assessment of Area Radiation Dose for the National Cyclotron and PET Centre at Chulabhorn Hospital in Thailand

Phornpailin Pairodsantikul, Paramest Wongsa, Waraporn Sudchai, Nawaporn Wimlopas, Rinrada Kongkhun, Natnaree Fangnok and Nathapol Boonsingma
Journal of Nuclear Medicine Technology June 2024, 52 (2) 152-157; DOI: https://doi.org/10.2967/jnmt.123.266159
Phornpailin Pairodsantikul
1School of Radiological Technology, Faculty of Health Science Technology, HRH Princess Chulabhorn College of Medical Science, Bangkok, Thailand;
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Paramest Wongsa
1School of Radiological Technology, Faculty of Health Science Technology, HRH Princess Chulabhorn College of Medical Science, Bangkok, Thailand;
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Waraporn Sudchai
2Thailand Institute of Nuclear Technology, Nakhon Nayok, Thailand; and
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Nawaporn Wimlopas
1School of Radiological Technology, Faculty of Health Science Technology, HRH Princess Chulabhorn College of Medical Science, Bangkok, Thailand;
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Rinrada Kongkhun
1School of Radiological Technology, Faculty of Health Science Technology, HRH Princess Chulabhorn College of Medical Science, Bangkok, Thailand;
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Natnaree Fangnok
1School of Radiological Technology, Faculty of Health Science Technology, HRH Princess Chulabhorn College of Medical Science, Bangkok, Thailand;
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Nathapol Boonsingma
3National Cyclotron and PET Centre, Chulabhorn Hospital, Bangkok, Thailand
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Abstract

The National Cyclotron and PET Centre at Chulabhorn Hospital offers nuclear medicine diagnostic services using state-of-the-art digital PET/CT and PET/MRI machines as well as other related devices. Additionally, the center plays a vital role by having a cyclotron to produce radiopharmaceuticals, which are used both in-house and in other hospitals throughout the country. Despite the center’s strict adherence to international standards regarding the use of radioactive substances in patients, there remains a potential risk of radiation exposure for operators, workers, and the public due to radioactive contamination and emissions from unsealed sources. Hence, it is imperative to assess and continuously monitor radiation levels in the work area to ensure the utmost level of safety for personnel. Methods: This study used optically stimulated luminescence dosimeters to measure radiation levels in 17 areas, consisting of 9 controlled and 8 supervised areas. Over a 3-mo period, the average monthly radiation dose was recorded for each location. Results: The PET/CT room registered the highest radiation dose within the controlled area, with a monthly average of 1.81 ± 0.29 mSv, equivalent to an annual dose of 21.72 mSv. This higher dose can be attributed to the significant number of patients served in this room. In supervised areas, the nursing counter located between the examination room and the patient waiting area exhibited the highest radiation exposure. The average monthly dose measured at this location was 0.085 ± 0.019 mSv, resulting in an annual dose of 1.015 mSv. Conclusion: The evaluation of radiation dose in controlled and supervised areas indicated that the overall radiation level remains within the prescribed limits. However, the slight excess that was observed at the nursing counter indicates the need for improvement to ensure compliance with the as-low-as-reasonably-achievable principle. Continuous monitoring of radiation levels should be conducted annually to maintain safety standards and minimize the risk that workers and the general public will be exposed to radioactivity.

  • radiation survey
  • OSL nanoDot
  • nuclear medicine

Footnotes

  • Published online Jan. 9, 2024.

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Journal of Nuclear Medicine Technology: 52 (2)
Journal of Nuclear Medicine Technology
Vol. 52, Issue 2
June 1, 2024
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Assessment of Area Radiation Dose for the National Cyclotron and PET Centre at Chulabhorn Hospital in Thailand
Phornpailin Pairodsantikul, Paramest Wongsa, Waraporn Sudchai, Nawaporn Wimlopas, Rinrada Kongkhun, Natnaree Fangnok, Nathapol Boonsingma
Journal of Nuclear Medicine Technology Jun 2024, 52 (2) 152-157; DOI: 10.2967/jnmt.123.266159

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Assessment of Area Radiation Dose for the National Cyclotron and PET Centre at Chulabhorn Hospital in Thailand
Phornpailin Pairodsantikul, Paramest Wongsa, Waraporn Sudchai, Nawaporn Wimlopas, Rinrada Kongkhun, Natnaree Fangnok, Nathapol Boonsingma
Journal of Nuclear Medicine Technology Jun 2024, 52 (2) 152-157; DOI: 10.2967/jnmt.123.266159
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  • Experiences of Nuclear Medicine Technologists Working in PET/CT Facilities in Gauteng Province, South Africa
  • Establishment of National Diagnostic Reference Levels for Administered Activity in Diagnostic Nuclear Medicine in Thailand
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Keywords

  • radiation survey
  • OSL nanoDot
  • nuclear medicine
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