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Haghparast, Mohammad, Parwaie, Wrya, Bakhshandeh, Mohsen, Tuncel, Nina, Mahdavi, Seied Rabi. (1401). Evaluation of Perkin Elmer Amorphous Silicon Electronic Portal Imaging Device for Small Photon Field Dosimetry. سامانه مدیریت نشریات علمی, (), -. doi: 10.31661/jbpe.v0i0.2112-1445
Mohammad Haghparast; Wrya Parwaie; Mohsen Bakhshandeh; Nina Tuncel; Seied Rabi Mahdavi. "Evaluation of Perkin Elmer Amorphous Silicon Electronic Portal Imaging Device for Small Photon Field Dosimetry". سامانه مدیریت نشریات علمی, , , 1401, -. doi: 10.31661/jbpe.v0i0.2112-1445
Haghparast, Mohammad, Parwaie, Wrya, Bakhshandeh, Mohsen, Tuncel, Nina, Mahdavi, Seied Rabi. (1401). 'Evaluation of Perkin Elmer Amorphous Silicon Electronic Portal Imaging Device for Small Photon Field Dosimetry', سامانه مدیریت نشریات علمی, (), pp. -. doi: 10.31661/jbpe.v0i0.2112-1445
Haghparast, Mohammad, Parwaie, Wrya, Bakhshandeh, Mohsen, Tuncel, Nina, Mahdavi, Seied Rabi. Evaluation of Perkin Elmer Amorphous Silicon Electronic Portal Imaging Device for Small Photon Field Dosimetry. سامانه مدیریت نشریات علمی, 1401; (): -. doi: 10.31661/jbpe.v0i0.2112-1445

Evaluation of Perkin Elmer Amorphous Silicon Electronic Portal Imaging Device for Small Photon Field Dosimetry

Journal of Biomedical Physics and Engineering
مقالات آماده انتشار، اصلاح شده برای چاپ، انتشار آنلاین از تاریخ 19 اردیبهشت 1401    اصل مقاله (1.36 M)
نوع مقاله: Original Research
شناسه دیجیتال (DOI): 10.31661/jbpe.v0i0.2112-1445
نویسندگان
Mohammad Haghparast1، 2؛ Wrya Parwaie3؛ Mohsen Bakhshandeh4؛ Nina Tuncel5؛ Seied Rabi Mahdavi1
1Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
2Department of Radiology, Faculty of Para-Medicine, Hormozgan University of Medical Sciences, Bandare-Abbas, Iran
3Department of Medical Physics, Faculty of Paramedical Sciences, Ilam University of Medical Sciences, Ilam, Iran
4Department of Radiology Technology, School of Allied Medical Sciences, Shahid Beheshti University of Medical Science, Tehran, Iran
5Radiation Oncology Department, School of Medicine, Akdeniz University, Antalya, Turkey
چکیده
Background: Electronic portal imaging devices (EPIDs) are applied to measure the dose and verify patients’ position.
Objective: The present study aims to evaluate the performance of EPID for measuring dosimetric parameters in small photon fields.
Material and Methods: In this experimental study, the output factors and beam profiles were obtained using the amorphous silicon (a-Si) EPID for square field sizes ranging from 1×1 to 10×10 cm2 at energies 6 and 18 mega-voltage (MV). For comparison, the dosimetric parameters were measured with the pinpoint, diode, and Semiflex dosimeters. Additionally, the Monaco treatment planning system was selected to calculate the output factors and beam profiles.
Results: There was a significant difference between the output factors measured using the EPID and that measured with the other dosimeters for field sizes lower than 8 × 8 cm2. In the energy of 6 MV, the gamma passing rates (3%/3 mm) between EPID and diode profile were 98%, 98%, 95%, 94%, 93%, and 94% for 1×1, 2×2, 3×3, 4×4, 5×5, and 10×10 cm2, respectively. The measured penumbra width with EPID was higher compared to that measured by the diode dosimeter for both energies.
Conclusion: The EPID can measure the dosimetric parameters in small photon fields, especially for beam profiles and penumbra measurements.
کلیدواژه‌ها
Computer-Assisted؛ Electronic Portal Imaging Device؛ Photons؛ Radiation Dosimetry؛ Radiotherapy Planning؛ Small Field
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