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Research ArticleTeaching Case Studies

An Unusual Cause of γ-Camera Contamination

David L. Francia, Kathy P. Willowson and Dale L. Bailey
Journal of Nuclear Medicine Technology December 2022, 50 (4) 381-383; DOI: https://doi.org/10.2967/jnmt.122.264172
David L. Francia
1Department of Nuclear Medicine, Royal North Shore Hospital, Sydney, New South Wales, Australia;
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Kathy P. Willowson
1Department of Nuclear Medicine, Royal North Shore Hospital, Sydney, New South Wales, Australia;
2Institute of Medical Physics, University of Sydney, Sydney, New South Wales, Australia; and
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Dale L. Bailey
1Department of Nuclear Medicine, Royal North Shore Hospital, Sydney, New South Wales, Australia;
3Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia
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Abstract

This report is of an unusual case of radioactive contamination of a γ-camera after scanning 2 individuals who had been treated 3 d beforehand with ablative doses of 131I for thyroid cancer. A combination of observed half-life and pulse-height spectroscopy was used to identify the contaminant. The source of the contamination was eventually found to be a single human hair, presumably contaminated when the individual was sucking her hair while waiting for the scan to start. This case demonstrates that hair can be contaminated by saliva and potentially other bodily fluids in the postablation setting and that using physical measurements, in this case the observed half-life and pulse-height spectroscopy, can be useful in identifying the radioactive contaminant.

  • instrumentation
  • quality assurance
  • radiation physics
  • contamination
  • gamma camera
  • radioiodine

Footnotes

  • Published online Jun. 14, 2022.

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Journal of Nuclear Medicine Technology: 50 (4)
Journal of Nuclear Medicine Technology
Vol. 50, Issue 4
December 1, 2022
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An Unusual Cause of γ-Camera Contamination
David L. Francia, Kathy P. Willowson, Dale L. Bailey
Journal of Nuclear Medicine Technology Dec 2022, 50 (4) 381-383; DOI: 10.2967/jnmt.122.264172

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An Unusual Cause of γ-Camera Contamination
David L. Francia, Kathy P. Willowson, Dale L. Bailey
Journal of Nuclear Medicine Technology Dec 2022, 50 (4) 381-383; DOI: 10.2967/jnmt.122.264172
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Keywords

  • Instrumentation
  • Quality Assurance
  • radiation physics
  • contamination
  • gamma camera
  • radioiodine
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