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Area of Science:

  • Radiological Sciences
  • Occupational Health
  • Medical Physics

Background:

  • Radiation protection advancements have reduced occupational doses for most medical radiation workers since the 1950s.
  • Radiologic technologists specializing in nuclear medicine may experience different dose trends due to higher per-procedure doses and increasing workloads.

Purpose of the Study:

  • To analyze occupational radiation doses over 36 years for U.S. radiologic technologists.
  • To compare radiation doses between general radiologic technologists and those in nuclear medicine.

Main Methods:

  • Summarized annual personal dose equivalents from 1980-2015 for 58,434 U.S. radiologic technologists.
  • Dose data were analyzed based on nuclear medicine procedure performance (frequency, type) and calendar year.
  • Used summary statistics to describe annual dose records, including median and interquartile ranges.

Main Results:

  • Median annual doses for general radiography decreased to below detection limits by 2015.
  • Nuclear medicine technologists maintained relatively high median annual doses (1.2 mSv) throughout the study period.
  • Higher doses were associated with frequent nuclear medicine (1.6 mSv) and PET (2.2 mSv) procedures.

Conclusions:

  • Occupational radiation doses for U.S. radiologic technologists performing general procedures have declined.
  • Nuclear medicine procedures are associated with consistently higher and more variable occupational radiation doses.
  • Cardiac nuclear medicine and PET procedures showed particularly elevated and variable dose levels.