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Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
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Comparative occupational radiation exposure between fixed and mobile imaging systems.

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Fixed imaging (FI) in endovascular suites results in significantly higher radiation exposure for surgical staff compared to mobile imaging (MI). Occupational radiation risk increases with FI, necessitating strategies to minimize staff exposure during endovascular procedures.

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Area of Science:

  • Medical Physics
  • Interventional Radiology
  • Occupational Health

Background:

  • Endovascular interventions utilize X-ray imaging, posing radiation exposure risks to surgical teams.
  • Radiation scatter varies significantly based on imaging equipment and procedure type.
  • Understanding occupational radiation exposure is critical for staff safety in interventional suites.

Purpose of the Study:

  • To compare occupational radiation exposure between fixed imaging (FI) in endovascular suites and mobile imaging (MI) in standard operating rooms.
  • To quantify differences in scattered radiation dose for surgical staff during endovascular procedures.
  • To assess the impact of imaging modality on radiation exposure across different staff positions.

Main Methods:

  • 116 endovascular cases were analyzed over 4 months, comparing FI and MI setups.
  • Real-time dosimetry badges (Unfors RaySafe) recorded staff radiation dose (mSv) and patient dose (mGy, air kerma).
  • Radiation doses were compared between imaging modalities and across staff roles (primary surgeon, assistant, support staff).

Main Results:

  • Fixed imaging (FI) resulted in significantly higher mean patient dose (523 ± 49 mGy vs 98 ± 19 mGy) and staff scattered radiation (0.77 ± 0.03 mSv vs 0.16 ± 0.08 mSv) compared to mobile imaging (MI).
  • Primary surgeons and assistants experienced significantly higher exposure with FI than MI.
  • Radiation exposure decreased significantly with distance; staff beyond 6 feet had negligible exposure, similar between FI and MI.

Conclusions:

  • Scattered radiation is several-fold higher with fixed imaging (FI) compared to mobile imaging (MI) in endovascular procedures.
  • Radiation exposure is distance-dependent, with negligible levels beyond a 6-foot radius.
  • Despite high-fidelity imaging in modern suites, additional strategies are required to mitigate occupational radiation risks for staff.