Citation

Alam, Md Masud and Khatun, Rajada and Ahmed, Mir Tahsin and Hasnat, Md. Abul and Zubair, H.T. and Akter, Shirin and Monika, Ashrafun Nahar and Sikder, Md. Kabir Uddin (2025) Characterization of the Radioluminescence Response of GeDoped Silica Fibers for 6 MV Radiotherapy Beam Profile Dosimetry. Iranian Journal of Medical Physics, 22 (4). pp. 209-217. ISSN 22520309

Text IJMP_Volume22_Issue4_Pages209-217.pdf - Published Version Restricted to Repository staff only Download (1MB)

Abstract

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.

Item Type:	Article
Uncontrolled Keywords:	Silica, fibers
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN799.5-948 Nonmetallic minerals
Divisions:	Faculty of Artificial Intelligence & Engineering (FAIE)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	06 Jan 2026 07:34
Last Modified:	06 Jan 2026 07:34
URII:	http://shdl.mmu.edu.my/id/eprint/15134

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