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Related Experiment Videos

Exposure and dose in panoramic radiology

A Goldstein1

  • 1Department of Radiology, Wayne State University School of Medicine, Detroit, Michigan 48201, USA. agoldste@med.wayne.edu

Medical Physics
|July 3, 1998
PubMed
Summary

Entrance skin exposure (ESE) in panoramic radiology was measured using thermoluminescent dosimeters (TLDs). TLDs provided accurate ESE measurements, establishing a reliable method for assessing radiation output from panoramic dental X-rays.

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Area of Science:

  • Medical Physics
  • Radiology
  • Radiation Dosimetry

Background:

  • Panoramic radiology is widely used in dental diagnostics.
  • Accurate measurement of entrance skin exposure (ESE) is crucial for radiation safety.
  • Traditional measurement methods may be inaccurate for complex scan geometries.

Purpose of the Study:

  • To accurately measure panoramic radiology entrance skin exposure (ESE).
  • To evaluate the accuracy of different measurement techniques for panoramic X-rays.
  • To establish a reliable method for assessing radiation output in panoramic radiology.

Main Methods:

  • Utilized a Siemens Orthopantomograph 10 E for measurements.
  • Employed thimble chambers and thermoluminescent dosimeters (TLDs).
  • Developed and validated a theoretical model for central plane ESE.

Main Results:

  • Thimble chamber measurements were found to be inaccurate due to beam geometry.
  • TLD measurements showed a consistent central ray ESE of approximately 20 mR.
  • A theoretical model closely matched TLD measurements and known dose properties.

Conclusions:

  • TLDs provide accurate ESE measurements for panoramic radiology.
  • A theoretical model offers a reliable method for predicting central plane ESE.
  • Central plane, beam central ray ESE is a practical measure of panoramic radiology radiation output.

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