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Research ArticleRadiation Safety

Radiation Exposure to the Nuclear Medicine Personnel During Preparation and Handling of 213Bi-Radiopharmaceuticals

Parul Thakral, Ishita Sen, Jakub Simecek, Sebastian Marx, Jyotsna Kumari, Sunil Kumar, Pankaj Tandon, Sugandha Dureja and Vineet Pant
Journal of Nuclear Medicine Technology March 2020, 48 (1) 68-72; DOI: https://doi.org/10.2967/jnmt.119.230516
Parul Thakral
1Department of Nuclear Medicine, Fortis Memorial Research Institute, Gurgaon, India
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Ishita Sen
1Department of Nuclear Medicine, Fortis Memorial Research Institute, Gurgaon, India
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Jakub Simecek
2Research and Development, Isotope Technologies Garching GmbH, Bavaria, Germany; and
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Sebastian Marx
2Research and Development, Isotope Technologies Garching GmbH, Bavaria, Germany; and
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Jyotsna Kumari
1Department of Nuclear Medicine, Fortis Memorial Research Institute, Gurgaon, India
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Sunil Kumar
1Department of Nuclear Medicine, Fortis Memorial Research Institute, Gurgaon, India
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Pankaj Tandon
3Radiological Safety Division, Atomic Energy Regulatory Board, Mumbai, India
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Sugandha Dureja
1Department of Nuclear Medicine, Fortis Memorial Research Institute, Gurgaon, India
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Vineet Pant
1Department of Nuclear Medicine, Fortis Memorial Research Institute, Gurgaon, India
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Abstract

Because of the excellent ability of α-particles to transfer a high amount of energy over a short tissue range, targeted α-therapy has been attracting rising numbers of nuclear medicine centers. In this study, we estimated the radiation exposure to the occupational workers with pocket dosimeters during handling of the α-emitter 213Bi, used for targeted α-therapy of neuroendocrine tumor and castration-resistant prostate cancer patients. The dose rates from patients at different distances and time points after injection of the therapy were also evaluated. Methods: This prospective study was done in the Department of Nuclear Medicine at Fortis Memorial Research Institute, Gurgaon, India. Twelve patients with neuroendocrine tumors or castration-resistant prostate cancer were enrolled to receive 213Bi-DOTATOC or 213Bi-prostate-specific membrane antigen therapy, respectively. Each patient received 2–3 intravenous injections of 213Bi-peptide, 266–362 MBq (7.2–9.8 mCi) in a single cycle over 2–3 d. The radiation exposure to nuclear medicine personnel at the chest and extremity levels was assessed for tasks such as elution, dispensing, injecting, and collecting blood samples. Radiation levels were measured at distances of 1 cm and 1 m from patients immediately after, and at 1, 2, and 4 h after, the administration of 213Bi-peptide. Results: The external dose incurred at the chest level by radiopharmacists during synthesis, by physicians during injection, by technologists during imaging, and by nurses during sample collection was 2–7 μSv/procedure. The extremity dose was 1–14 μSv/procedure. The dose rate at 1 m from patients immediately after 213Bi-radiopharmaceutical injection was 0.02–0.03 μSv/MBq⋅h. Conclusion: The external radiation doses received by occupational workers involved in various procedures were far below the limit prescribed by the regulatory authority (20 mSv/y).

  • α-therapy
  • 213Bi
  • targeted therapy
  • radiation safety
  • personnel monitoring
  • TAT

Footnotes

  • Published online Oct. 11, 2019.

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Journal of Nuclear Medicine Technology: 48 (1)
Journal of Nuclear Medicine Technology
Vol. 48, Issue 1
March 1, 2020
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Radiation Exposure to the Nuclear Medicine Personnel During Preparation and Handling of 213Bi-Radiopharmaceuticals
Parul Thakral, Ishita Sen, Jakub Simecek, Sebastian Marx, Jyotsna Kumari, Sunil Kumar, Pankaj Tandon, Sugandha Dureja, Vineet Pant
Journal of Nuclear Medicine Technology Mar 2020, 48 (1) 68-72; DOI: 10.2967/jnmt.119.230516

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Radiation Exposure to the Nuclear Medicine Personnel During Preparation and Handling of 213Bi-Radiopharmaceuticals
Parul Thakral, Ishita Sen, Jakub Simecek, Sebastian Marx, Jyotsna Kumari, Sunil Kumar, Pankaj Tandon, Sugandha Dureja, Vineet Pant
Journal of Nuclear Medicine Technology Mar 2020, 48 (1) 68-72; DOI: 10.2967/jnmt.119.230516
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Keywords

  • α-therapy
  • 213Bi
  • targeted therapy
  • Radiation Safety
  • personnel monitoring
  • TAT
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