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International Journal of Radiation Research، جلد ۱۶، شماره ۴، صفحات ۴۹۳-۴۹۷
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چکیده فارسی مقاله
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عنوان انگلیسی Dosimetric verification of pre-treatment intensity modulated radiation therapy in the commissioning process
چکیده انگلیسی مقاله Background: Commissioning tests are recommended before implementing Intensity Modulated Radiation Therapy. This study evaluated five different plans of IMRT mocks for different modulation indices. Materials and Methods: IMRT tests were done in slab phantom for both 6MV and 15 MV photon energies using a 2D array ion chamber dosimeter. Results: The acceptance criteria were based on 3% /3mm. All tests passed the gamma criteria except for the prostate test with 15 MV photon beams and C shape test for both 6 MV and 15 MV energies. The Ratio passing points for Multi target test in 6 MV and 15 MV plans were 93.1% and 91.5%, respectively. The results of the prostate tests with 3%/3mm was 92.3% for 6MV and 91.2% for 15 MV in 4%/4 mm tolerance limit. For Head and Neck test with the same gamma criteria, the percentages of the points were 93.2 and 94 for 6 MV and 15 MV plans, respectively. For C shape tests, the used gamma criteria were 4%/ 4 mm. The ratio passing points were 94.9% and 94.3% for 6MV and 15MV plans, respectively. However, C shape hard test could not pass the gamma criteria of 4%/ 4mm for 6MV. Conclusion: results showed that by increasing the complexity of the IMRT plan, the verification test must be done in a more strict-manner, because a small change in dose delivery can cause a large discrepancy between planned and real dosimetry and may produce hot spots in organs or a cold spot in the target volume.
کلیدواژه‌های انگلیسی مقاله Pre- treatment IMRT, 2D array, IMRT mock, Gamma evaluation.
نویسندگان مقاله | G. Esmaili
Department of Medical Physics. Iran University of Medical Sciences, Tehran, Iran


| S.R. Mahdavi
Radiation Biology Research Center & Medical Physics Department, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran


| A.R. Nikoofar
Radiation Oncology Department, Faulty of Medicine, Iran University of Medical Sciences. Tehran, Iran


| P. Fadavi
Radiation Oncology Department, Faulty of Medicine, Iran University of Medical Sciences. Tehran, Iran


| A. Ameri
Radiation Oncology Department, Faulty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran


| V. Nazari
Department of Medical Physics, Faculty of Medicine, Hamedan University of Medical Sciences, Hamedan, Iran
نشانی اینترنتی http://ijrr.com/browse.php?a_code=A-10-1-749&slc_lang=en&sid=1
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/42/article-42-1167391.pdf
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Radiation Biology
نوع مقاله منتشر شده Technical Note
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