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KMID : 0357520160390010043
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Journal of Radiological Science and Technology
2016 Volume.39 No. 1 p.43 ~ p.49
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Calibration of CR-39 for Hadron Radiotherapy using 400 MeV/u C ions
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Kim Sung-Hwan
Nam Uk-Won
Lee Jae-Jin
Park Won-Kee
Pyo Jeong-Hyun
Moon Bong-Kon
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Abstract
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In this study, equivalent dose and LET (Linear Energy Transfer) calibration of CR-39 SSNTD (Solid State Nuclear Track Detector) were performed using 400 MeV/u C heavy ions in HIMAC (Heavy Ion Medical Accelerator in Chiba) for high LET radiation therapy. The irradiated CR-39 SSNDTs were etched according the etching condition of JAXA (Japan Aerospace Exploration Agency). And the etched SSNTDs were analyzed by using Image J. Determined frequency mean dose e ( yD )and dose-mean lineal energy ( yF )of 400 MeV/u C are about 8.5keV/mm and 10.1 keV/mm, respectively by using the CR-39 SSNTD. This value is very similar to the results calculated by GEANT4 Monte Carlo simulation and measured with TEPC (Tissue Equivalent Proportional Counter) active radiation detector. We could determine the equivalent dose and
LET calibration factors of CR-39. And we confirmed that the CR-39 SSNTD was useful for high LET radiation dosimetry in hadron radiotherapy.
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KEYWORD
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High LET , CR-39 , Carbon ion , SSNTD , Radiotherapy
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