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Shielding effectiveness of X-ray protective garment.

H Eder1, H Schlattl2

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Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)
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Summary

X-ray shielding garments show significantly higher real-world attenuation than standard tests indicate. This finding can improve the effectiveness of personal protective equipment for healthcare professionals.

Keywords:
Attenuation factorEffective doseOrgan dosesProtective garment

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Area of Science:

  • Medical Physics
  • Radiation Protection
  • Biomedical Engineering

Background:

  • Current certification of X-ray shielding garments relies on flat material sample testing.
  • This method may not accurately reflect shielding effectiveness during actual use on a person.

Purpose of the Study:

  • To investigate the difference in shielding effectiveness of X-ray protective garments when worn by a person compared to standard flat material testing.
  • To compare real-world attenuation factors with those obtained under IEC 61331-1 conditions.

Main Methods:

  • Monte Carlo (MC) simulations using the ICRP female reference model and experimental measurements were performed for various clinical scenarios.
  • Attenuation factors were evaluated for effective dose (E) and personal dose equivalent Hp(10).
  • Calculated and measured factors were compared to standard IEC 61331-1 test conditions.

Main Results:

  • At 80 kV, real attenuation factors for a 0.35 mm Pb apron on a 3D body were 38% to 76% higher than IEC test results.
  • MC calculations indicated the highest contribution to effective dose (E) in the abdomen/pelvis region of the wearer.
  • Discrepancies highlight limitations of current standardized testing.

Conclusions:

  • Real-world shielding effectiveness of personal X-ray protective garments is significantly higher than indicated by standard flat-sample tests.
  • Findings suggest potential for improving the design and effectiveness of protective garments.
  • Optimization of protective garment design based on body-worn simulations is recommended.