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Iranian Journal of Medical Physics، جلد ۱۶، شماره ۵، صفحات ۳۳۶-۳۴۰
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی New Method of Quality Control Test for Light and Radiation Field Coincidence in Medical Linear Accelerators
چکیده انگلیسی مقاله Introduction: The evaluation of X-ray and light field coincidence in linear accelerators as a quality control test is often performed subjectively, involving the manual marking of films and their visual inspection following the irradiation. Therefore, the present study aimed to develop an objective method for the performance of this test leading to the increased levels of accuracy, precision, and speed for the measurement of X-ray and light field coincidence. Material and Methods: The new method involved a portable, lightweight, and inexpensive device containing optically-shielded and non-shielded photodiodes to detect the location and dimensions of the light and X-ray fields. The obtained results were analyzed using purpose-written user-friendly software. Results: On the basis of the results, this system could be a reliable method to measure the coincidence of the two fields with the accuracy of 0.5 mm and average field size standard deviations of Elekta Presice and Siemens Primus are 22.47 mm2 and 22.36 mm2, respectively. The result was well within the tolerance recommended by the American Association of Physicists in Medicine task group report number 142. Conclusion: The proposed method allows accurate and precise measurements through a largely automated process. Therefore, the measurement results benefit from the reduced level of subjectivity or human error, compared to the standard film-based technique. 
کلیدواژه‌های انگلیسی مقاله Quality Control, Quality Assurance, Radiation
نویسندگان مقاله | Mahdi Heravian Shandiz
Biomedical Engineering Department, Imam Reza Educational, Research and Treatment Center, Mashhad University of Medical Science, Mashhad, Iran


| Ghorban Safaeian Layen
Department of Technology of Radiology, school of paramedical science, Mashhad University of Medical Science, Mashhad, Iran


| Mohammad-Hossein Bahreyni-Toosi
Medical Physics Research Center, Medical Physics Department, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran


| Ali Feyzi
Department of Technology of Radiology, school of paramedical science, Mashhad university of medical science, Mashhad, Iran


| Amir Hossein Ziaei
Department of Technology of Radiology, school of paramedical science, Mashhad University of Medical Science, Mashhad, Iran
نشانی اینترنتی http://ijmp.mums.ac.ir/article_13084.html
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/145/article-145-1862274.pdf
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده Original Paper
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