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Updated: Jul 29, 2026

Dosimetry for Cell Irradiation using Orthovoltage (40-300 kV) X-Ray Facilities
Published on: February 20, 2021
Radiation protection standards: their evolution from science to philosophy.
R L Dixon1, Joel E Gray, B R Archer
1Department of Radiology, Wake Forest University School of Medicine, Winston-Salem, NC 27157-1088, USA. rdixon@wfubmc.edu
Applying dose limits to individual medical X-ray sources is inappropriate. Current radiation protection models for the public, using a 1 mSv y(-1) source control limit, are critically examined.
Area of Science:
- Medical Physics
- Radiation Protection
- Radiological Sciences
Background:
- Current radiation protection practices for medical X-ray sources are based on a consensus that individual source constraints are inappropriate.
- The National Council on Radiation Protection and Measurements (NCRP) report series utilizes a 1 mSv y(-1) source control limit for shielding design.
Purpose of the Study:
- To discuss the rationale behind the consensus against applying public dose limits to individual medical X-ray sources.
- To critically evaluate the existing public radiation protection model for medical X-ray facilities.
Main Methods:
- Literature review of NCRP reports and consensus statements.
- Critical analysis of the current public radiation protection framework for medical X-ray sources.
Main Results:
- The study supports the consensus that individual source constraints are inappropriate for medical X-ray shielding.
- The current public radiation protection model, including the 1 mSv y(-1) limit, warrants critical re-evaluation.
Conclusions:
- The established approach of not applying public dose limits to individual medical X-ray sources is justified.
- Further examination of the public radiation protection model is necessary to ensure its continued appropriateness and effectiveness.
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