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Updated: Aug 26, 2025

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

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Extension of the RADTriage Colorimetric Dosimeter to Low-Dose Gamma-Ray Exposure Using Scanning Densitometry.

Lindsay Rand¹, Matthew M Mille², Timothy J Jorgensen¹

¹Georgetown University, Washington, DC 20057.

|October 12, 2022

Summary

This summary is machine-generated.

This study validates the RADTriage50 colorimetric dosimeter using digital scanning, finding it accurate at low ionizing radiation doses. The method provides quantitative readings and reveals dose-response linearity up to approximately 750 mSv.

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Published on: January 30, 2020

Area of Science:

Medical Physics
Radiation Detection and Measurement

Background:

A need exists for inexpensive, easy-to-read ionizing radiation dosimeters for first responders and the public.
The RADTriage50 TM colorimetric dosimeter is a commercial option, but its accuracy at low doses (<50 mSv) and quantitative readout methods require further investigation.

Purpose of the Study:

To evaluate the accuracy of RADTriage50 dosimeters at low ionizing radiation doses using digital scanning densitometry.
To determine if digital scanning allows for quantitative readout with an extended dynamic range.
To assess the dosimeter's dependency on gamma energy and dose rate.

Main Methods:

RADTriage50 dosimeters were irradiated using a gamma irradiator traceable to national standards.
Digital scanning densitometry was employed for quantitative readout of exposed dosimeters.
Experiments covered deep dose equivalents from below 50 mSv to 2,000 mSv, using 137Cs and 60Co gamma energies.

Main Results:

The digital scanning method enabled quantitative readout of RADTriage50 dosimeters, including at low doses (<50 mSv).
The dosimeter's dose-response was linear at low doses, with non-linearity emerging around 750 mSv and a plateau near 2,000 mSv.
Dosimeter response varied with gamma energy but was independent of dose rate.

Conclusions:

Digital scanning densitometry is a viable method for quantitative readout of RADTriage50 dosimeters, extending their utility to low-dose measurements.
The RADTriage50 dosimeter exhibits a linear response at low doses, making it suitable for initial screening, but its accuracy is dependent on gamma energy.