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National reference doses for dental cephalometric radiography.

J R Holroyd1

  • 1Occupational Services Department, Health Protection Agency, Leeds, UK. john.holroyd@hpa.org.uk

The British Journal of Radiology
|November 22, 2011
PubMed
Summary

This study proposes provisional National Reference Doses (NRDs) for cephalometric radiography, setting benchmarks at 40 mGy cm² for adults and 25 mGy cm² for children to aid in dose optimization.

Area of Science:

  • Radiological Protection
  • Medical Imaging
  • Dental Diagnostics

Background:

  • Diagnostic Reference Levels (DRLs) are crucial for optimizing clinical radiography.
  • Currently, no national DRLs exist for cephalometric radiography.
  • The Health Protection Agency (HPA) previously published National Reference Doses (NRDs) for various X-ray examinations.

Purpose of the Study:

  • To establish provisional National Reference Doses (NRDs) for cephalometric radiography.
  • To provide benchmarks in the absence of formal national DRLs for this procedure.

Main Methods:

  • Utilized measurements from the Dental X-ray Protection Service (DXPS) of the HPA.
  • Data collected during routine cephalometric X-ray equipment testing across the UK.
  • Derived provisional NRDs based on dose-area product measurements.

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Main Results:

  • Analyzed dose-area product data from 42 X-ray sets.
  • Determined third quartile dose-area product values: 41 mGy cm² for adult lateral cephalometric radiography and 25 mGy cm² for child lateral cephalometric radiography.
  • Observed individual measurements ranging from 3 mGy cm² to 108 mGy cm².

Conclusions:

  • Proposed provisional NRDs of 40 mGy cm² for adult and 25 mGy cm² for child lateral cephalometric radiographs.
  • These proposed NRDs can assist employers in establishing local DRLs.
  • Highlights the need for standardized dose reference levels in cephalometric radiography.