Affiliations: [a] Department of Radiology, The First People’s Hospital of Lianyungang, Lianyungang, China
| [b]
Baghdad College of Medical Sciences, Baghdad, Iraq
| [c] Department of Medical Laboratory Techniques, Al-Maarif University College, Al-Anbar-Ramadi, Iraq
| [d] Radiology Department, College of Health and Medical Technology, Al-Ayen University, Thi-Qar, Iraq
| [e] Technical Engineering Department College of Technical Engineering, The Islamic University, Najaf, Iraq
| [f] Department of Pharmacy, Kut University College, Kut, Wasit, Iraq
Correspondence:
[*]
Corresponding author: Yasir Q. Almajidi, Baghdad College of Medical Sciences, Baghdad, Iraq. E-mail: almajidiyasir@gmail.com.
Abstract: BACKGROUND:Several physical factors such as photon beam energy, electron beam energy, and dose rate may affect the dosimetric properties of polymer gel dosimeters. The photon beam energy and dose rate dependence of PASSAG gel dosimeter were previously evaluated. OBJECTIVE:This study aims to assess the dosimetric properties of the optimized PASSAG gel samples in various electron beam energies. METHODS:The optimized PASSAG gel samples are first fabricated and irradiated to various electron energies (5, 7, 10 and 12 MeV). Then, the response (R2) and sensitivity of gel samples are analyzed by magnetic resonance imaging technique at a dose range of 0 to 10 Gy, scanning room temperature range of 15 to 22 °C, and post-irradiation time range of 1 to 30 days. RESULTS:The R2-dose response and sensitivity of gel samples do not change under the evaluated electron beam energies (the differences are less than 5%). Furthermore, a dose resolution range of 11 to 38 cGy is obtained for the gel samples irradiated to different electron beam energies. Moreover, the findings show that the R2-dose response and sensitivity dependence of gel samples on electron beam energy varies over different scanning room temperatures and post-irradiation times. CONCLUSION:The dosimetric assessment of the optimized PASSAG gel samples provides the promising data for this dosimeter during electron beam radiotherapy.
Keywords: Electron beam radiotherapy, PASSAG, MRI, Polymer gel dosimetry
