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Journal of Medical Signals and Sensors، جلد ۹، شماره ۳، صفحات ۲۰۴-۲۱۰
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عنوان انگلیسی Evaluation of Dose Rate and Photon Energy Dependence of Gafchromic EBT3 Film Irradiating with 6 MV and Co-60 Photon Beams
چکیده انگلیسی مقاله Gafchromic films are utilized for two-dimensional dose distribution measurements, especially in radiotherapy. In this study, we investigated a close connection between energy and dose rate of Gafchromic EBT3 films irradiating with 6 MV and Co-60 photon beams over a broad dose range. EBT3 films were exposed to 6 MV and Co-60 photon beams using 4 and 2 Gy/min dose rates over a 10-400 cGy dose range. The films were scanned in red, green, and blue channels to obtain the optical density (OD)-dose curves. The OD-dose curves resulted from three-color scans for different photon energies and dose rates were compared by statistical independent t-test. For the radiations of Co-60 and 6 MV photon beams, the highest correlation was obtained between the 2 and 4 Gy/min dose rates with red and green channels, respectively. Moreover, the red channel had a greater OD response per dose value, following the green and blue channels. There was no significant difference between different photon energies' (Co-60 and 6 MV) and dose rates' (2 and 4 Gy/min) dependence on OD-dose response of EBT3 films over a broad domain of radiation dose, except for different photon energies in the blue channel. Our results revealed that the OD-dose response of EBT3 films is independent on photon energies (Co-60 and 6 MV) and dose rate (2 and 4 Gy/min) in the evaluated dose range (10-400 cGy). Therefore, the EBT3 films are suitable, consistent, and reliable instruments for dose measurements in radiotherapy.
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نویسندگان مقاله | Gholamreza Ataei


| Maral Rezaei


| Kourosh Ebrahimnejad Gorji


| Amin Banaei


| Nouraddin Abdi Goushbolagh


| Bagher Farhood


| Mahmoud Bagheri


| Razzagh Abedi-Firouzjah


نشانی اینترنتی http://jmss.mui.ac.ir/index.php/jmss/article/view/501
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/217/article-217-1955980.pdf
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Short Reports
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