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Extremity ring dosimetry intercomparison in reference and workplace fields.

M Ginjaume1, E Carinou, L Donadille

  • 1Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya, Diagonal 647, 08028 Barcelona, Spain. merce.ginjaume@upc.edu

Radiation Protection Dosimetry
|September 2, 2008
PubMed
Summary
This summary is machine-generated.

This study assessed extremity dosemeters used in clinical settings. While most performed well with photon radiation, challenges remain in accurately measuring low-energy beta radiation and positron emissions from Fluorine-18.

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Last Updated: Jul 2, 2026

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06:20

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

Area of Science:

  • Medical Physics
  • Radiation Dosimetry

Background:

  • Extremity doses in clinical settings can be high, necessitating accurate monitoring.
  • Ring dosemeters are commonly used for extremity dosimetry, but their performance varies.

Purpose of the Study:

  • To evaluate the technical capabilities and performance of available extremity dosemeters.
  • To assess dosemeter performance in realistic clinical environments with high extremity dose potentials.

Main Methods:

  • An intercomparison study involving 24 services from 16 countries.
  • Dosemeters were exposed to reference photon ((137)Cs) and beta ((147)Pm, (85)Kr, (90)Sr/(90)Y) radiation fields.
  • Exposure also included realistic fields simulating interventional radiology and nuclear medicine settings ((99m)Tc, (18)F).

Main Results:

  • Most dosemeters provided satisfactory measurements for photon radiation (H(p)(0.07)).
  • Only four dosemeters met all requirements across all tested radiation qualities.
  • Significant difficulties were observed in measuring low-energy beta radiation.
  • A general under-response to (18)F was noted, attributed to challenges in measuring positron contributions.

Conclusions:

  • Most extremity dosemeters are adequate for photon radiation monitoring in clinical settings.
  • Further development is needed for dosemeters to accurately measure low-energy beta radiation and positron emitters like (18)F.
  • The intercomparison highlights the need for improved dosemeter performance for specific clinical applications.