Examination of fundamental characteristics of a polymer gel detector in a proton beam irradiation

This paper was intended as a study of the radiological characteristics of a polymer gel detector in a clinical proton beam irradiation. The depth dose distributions in the detector were examined with regard of dose and dose rate dependences in the response. Our experimental results indicated that th...

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Bibliographic Details
Published in:Radiation measurements 2011, Vol.46 (1), p.64-71
Main Authors: Yoshioka, M., Tominaga, T., Usui, S., Hayashi, S., Haneda, K., Tsunei, Y., Katahira, K., Suga, D., Hishikawa, Y., Teshima, T.
Format: Article
Language:English
Subjects:
Bragg peak
Detectors
Dosage
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geochronology
Irradiation
Isotope geochemistry. Geochronology
LET
MAGAT
Monitors
Polymer gel
Proton beam
Proton beams
Proton irradiation
Radiation measurement
Radiation therapy
Reproducibility
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Summary:This paper was intended as a study of the radiological characteristics of a polymer gel detector in a clinical proton beam irradiation. The depth dose distributions in the detector were examined with regard of dose and dose rate dependences in the response. Our experimental results indicated that the dose response depended considerably on the depth from the incident position, and also the dose rate in the proton irradiation. We estimated the dose response at different depth of the incident proton beam from the depth- R 2 relations with various dose, and the spread-out depth dose in a single field irradiation derived from these dose responses obtained the good agreement with a planned dose distribution. In conclusion, our method with MAGAT type polymer gel is effective in a quality assurance of fundamental reproducibility test for three dimensional radiation therapy planning system, such as monitor unit verification and standard isodose verification using a single field proton beam. However the depth dose distribution should be evaluated depending on irradiation dose rate, SOBP width, and maximum energy.
ISSN:1350-4487
1879-0925
DOI:10.1016/j.radmeas.2010.08.007