Radiation dose measurement for patients undergoing nuclear medicine diagnostic studies and for medical staff
Keywords:
Nuclear medicine, Radiation dose rate, PET/CT scanAbstract
Nuclear medicine tests involve injecting radioactive substances into the patient's body to provide information about organ function and pathology. This raises concerns about radiation safety when managing or caring for patients exposed to radiation. The objective of this study was to measure the radiation dose rate emitted by patients during various nuclear medicine diagnostic tests. A gas-filled dosimeter was used to measure the radiation dose rate at three key times: immediately after the radiopharmaceutical injection, during the nuclear medicine examination, and before the patient was discharged. Measurements were taken at distances of 0, 0.25, 0.5, 1, and 2 meters from the patient. The study involved 385 patients undergoing 21 different nuclear medicine examinations. Six types of examinations exhibited an average radiation dose rate higher than 10 µSv/hr at 0 meters immediately after radiopharmaceutical injection. During the examination, five types of tests showed similar rates, and before discharge, only two types did. The highest radiation dose rate, observed immediately after injection during a PET/CT scan, reached 248 µSv/hr. This rate decreased during subsequent examinations and before the patients were discharged. The radiation dose rate consistently diminished as the distance from the patient increased. Notably, no examination recorded a radiation dose rate exceeding 50 µSv/hr at a distance of 1 meter from the patient before discharge. In conclusion, nuclear medicine diagnostic tests involve the use of radioactive tracers, leading to the highest radiation dose rates immediately after injection, which then decrease over time and distance. These radiation levels remain within safe limits for both medical staff and patients.
References
International Commission on Radiological Protection. ICRP Statement on Tissue Reactions / Early and Late Effects of Radiation in Normal Tissues and Organs – Threshold Doses for Tissue Reactions in a Radiation Protection Context. ICRP Publication 118 Ann ICRP 41(1/2). 2012.
Wisetnan C, Awikunprasert P, Kaewsombat T, Molee P. Radiation emitted from patients undergoing nuclear medicine examination at Udonthani Cancer Hospital. J Assoc Med Sci 2021;54(3):73-7.
Willegaignon J, Fernandes SCP, Pelissoni RA, Coura-Filho GB, Sapienza MT, Buchpiguel CA. Radiation safety measures in diagnostic nuclear medicine, based on the potential radiation dose emitted by radioactive patients. Radiol Bras 2023;56(1):13-20.
Gomez-Palacios M, Terrón JA, Domínguez P, Vera DR, Osuna RF. Radiation doses in the surroundings of patients undergoing nuclear medicine diagnostic studies. Health Phys 2005;89(2 Suppl):S27-34.
Matusiak K, Wolna J, Jung A, Sadowski L, Pawlus J. Impact of the Frequency and Type of Procedures Performed in Nuclear Medicine Units on the Expected Radiological Hazard. Int J Environ Res Public Health 2023;20(6).
Bayram T, Yilmaz AH, Demir M, Sonmez B. Radiation dose to technologists per nuclear medicine examination and estimation of annual dose. J Nucl Med Technol 2011;39(1):55-9.
Nassef MH, Kinsara AA. Occupational Radiation Dose for Medical Workers at a University Hospital. JTUSCI 2017;11(6):1259-66.
Díaz Barreto M, López Bejerano GM, Varela Corona C, Fleitas Estévez I. On the safety of persons accompanying nuclear medicine patients. Radiat Prot Dosimetry 2012;152(4):313-6.
Elshami W, Erdemir RU, Abuzaid MM, Cavli B, Issa B, Tekin HO. Occupational radiation dose assessment for nuclear medicine workers in Turkey: A comprehensive investigation. J King Saud Univ Sci 2022;34(4):102005.
Poonak K, Uaratanawong S. Radiation dose to nurses per nuclear medicine examination. The Thai Journal of Radiological Technology 2018;43(1):44-7. [in Thai]
Pavičar B, Davidović J, Petrović B, Vuleta G, Trivić S, Šajinović V, et al. Nuclear medicine staff exposure to ionising radiation in (18)F-FDG PET/CT practice: a preliminary retrospective study. Arh Hig Rada Toksikol 2021;72(3):216-24.
Buapoon P. Nurses care for thyroid cancer patients receiving high doses of radioiodine-131. Journal of Siriaj Radiology 2015;2(2):110-22.
Takahashi Y, Hosokawa S, Tsujiguchi T, Monzen S, Kanzaki T, Shirakawa K, et al. Time-related study on external exposure dose of 2-deoxy-2-[F-18]fluoro-D-glucose PET for workers' safety. Radiol Phys Technol 2020;13(1):98-103.
Kheruka SC, Shankar N, Ora M, Gambhir S. Do Current Radiation Safety Guidelines allow the Safe Release of a Thyroid Cancer Patient after High-dose Radioiodine Therapy? An Indian Perspective. Indian J Nucl Med 2021;36(2):148-52.
Krajewska G, Krajewski P. Evaluation of internal exposure of nuclear medicine staff working with radioiodine in Poland. Int J Occup Med Environ Health 2023;36(5):587-95.
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