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Iranian Journal of Medical Physics، جلد ۲۲، شماره ۴، صفحات ۲۰۹-۲۱۷
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Characterization of the Radioluminescence Response of Ge-Doped Silica Fibers for 6 MV Radiotherapy Beam Profile Dosimetry
چکیده انگلیسی مقاله Introduction: Accurate radiation dose measurement in both target and non-target tissues is essential in modern external beam radiotherapy. In dosimetry systems, the goal is to deliver the maximum dose to the target volume while ensuring minimal exposure to the surrounding normal cells. Among various medical dosimetry systems like thermoluminescence (TL), optically stimulated luminescence (OSL), and radioluminescence (RL), the RL system offers a real-time monitoring system.Material and Methods: This study aims to characterize the Ge-doped probe in making beam profile measurements using the myDoz® RL/OSL dosimetry system and comparing its accuracy with a CC-13 ion chamber. The RL system utilized a 30-meter PMMA optical fiber with a Ge-doped optical fiber scintillator probe. Beam profiles were measured for 3 × 3 and 10 × 10 cm² field sizes at a depth of 1.5 cm in solid water, with a source-to-surface distance (SSD) of 100 cm, using a 6 MV photon beam, 400 MU/min dose rate, and a total dose of 3 Gy.Results: The RL readout mechanism enabled instantaneous dose and dose-rate readings. The results showed high consistency and close agreement with the CC-13 ion chamber, with beam profiles displaying uniform central dose, sharp penumbra, and strong symmetry. Larger fields exhibited increased flatness due to photon dispersion. Moreover, the dose distribution out-of-field may still cause low-dose exposure to normal tissues.Conclusion: To sum up, Ge-doped fibers demonstrated excellent real-time, high-resolution performance, making them promising alternatives to traditional dosimeters. Future research should focus on clinical implementation and system optimization for advanced radiotherapy methods.
کلیدواژه‌های انگلیسی مقاله In, Vivo Dosimetry Radioluminescence Ge, Doped Silica Fiber Beam Profile Flatness LINAC
نویسندگان مقاله | Md Masud Alam
Department of Physics, Jahangirnagar University, Savar, Dhaka, Bangladesh


| Rajada Khatun
PSO &Head, Medical Physics Division Atomic Energy Centre, 4 Kazi Nazrul Islam Avenue, Shahbag, Dhaka-1000 Bangladesh Atomic Energy Commission


| Mir Tahsin Ahmed
Department of Nuclear Engineering, University of Dhaka, Dhaka, Bangladesh


| Md. Abul Hasnat
Institute of Nuclear Medical Physics, AERE, Savar, BAEC, Bangladesh


| H.T. Zubair
Center for Fiber Networking and Communication, COE for Intelligent Network, Multimedia University, 63100 Cyberjaya, Selangor, Malaysia


| Shirin Akter
Medical Physics Division, Atomic Energy Centre, Dhaka, Bangladesh


| Ashrafun Monika
Medical Physics Division, Atomic Energy Centre, Dhaka, Bangladesh


| Md. Kabir Sikder
Department of Physics, Jahangirnagar University, Savar, Dhaka, Bangladesh
نشانی اینترنتی https://ijmp.mums.ac.ir/article_27056.html
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Original Paper
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