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Radiophotoluminescence dosimetry using a small spherical glass: a preliminary phantom study
Keiichi Nakagawa1, Kiyoshi Yoda, Takashi Shiraki
1Department of Radiology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655, Japan.
Radiation Protection Dosimetry
|September 14, 2006
Summary
This study introduces a novel radiophotoluminescence dosimetry method using silver-activated phosphate glass. The system demonstrates a linear response to radiation dose, offering a reliable tool for accurate dose measurement.
Area of Science:
- Medical Physics
- Radiation Dosimetry
- Materials Science
Background:
- Radiophotoluminescence (RPL) dosimetry offers a promising method for radiation measurement.
- Silver-activated phosphate glass is a suitable material for RPL dosimetry due to its luminescence properties.
Purpose of the Study:
- To evaluate the efficacy of spherical silver-activated phosphate glass for radiophotoluminescence dosimetry.
- To assess the linearity and reliability of the proposed dosimetry system.
Main Methods:
- Utilized 1.5 mm diameter spherical silver-activated phosphate glass samples.
- Irradiated samples with a 6 MV photon dose (2-3.5 Gy) at a 10 cm depth between solid water phantoms.
- Employed a normalized readout system with simultaneous measurement of irradiated and non-irradiated references to mitigate background noise and system fluctuations.
Main Results:
- Achieved a normalized standard deviation of 1.8% for the dosimetry system.
- Demonstrated a linear increase in normalized output with increasing applied radiation dose.
- The system proved effective for doses up to 3.5 Gy.
Conclusions:
- The proposed radiophotoluminescence dosimetry system using silver-activated phosphate glass is accurate and reliable.
- The linear dose response indicates its potential for precise radiation dose monitoring.
- This method offers a viable alternative for dosimetry applications in various settings.
