این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
International Journal of Radiation Research، جلد ۱۳، شماره ۴، صفحات ۳۴۵-۳۵۴
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Dose calculations accuracy of TiGRT treatment planning system for small IMRT beamlets in heterogeneous lung phantom
چکیده انگلیسی مقاله Background: Accurate dose calculations in small beamlets and lung material have been a great challenge for most of treatment planning systems (TPS). In the current study, the dose calculation accuracy of TiGRT TPS was evaluated for small beamlets in water and lung phantom by comparison to Monte Carlo (MC) calculations. Materials and Methods: The head of Siemens Oncor-impression linac was simulated for 6 and 18 MV photon beams using MCNPX MC Code. The model was validated using measured percentage depth dose and beam profiles. Then, the validated model used for dose calculations for small beamlets in water as well as lung phantoms. For treatment planning purposes, the lung phantom was scanned and imported into the TPS, and then the percentage depth dose values were obtained from plans for small fields of 1×1, 2×2, 3×3 and 4×4 cm2 in water and lung phantom. Results: For small fields in water phantom, there was a good agreement between TPS and MC for 2×2 to 4×4 cm2 field sizes. Nevertheless, the depth doses in lung phantom showed large discrepancies between TPS and MC calculations for points inside lung and lung-soft tissue interfaces. The TPS underestimated the lung dose up to 67% and 110% for 6 and 18 MV beams compared to MC results. Conclusion: Our findings revealed that the TiGRT TPS was not able to account for lung inhomogeities in small beamlets. Besides, the TPS calculated depth doses were not accurate enough to be used for small beamlets used in IMRT of lung region.
کلیدواژه‌های انگلیسی مقاله
نویسندگان مقاله اصغر مصباحی | asghar mesbahi
department of medical physics, medical school, tabriz university of medical sciences, tabriz, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تبریز (Tabriz university of medical sciences)

h دادگر | h. dadgar
radiation oncology department, imam hospital, tabriz, iran
نشانی اینترنتی http://www.ijrr.com/browse.php?a_code=A-10-1-582&slc_lang=en&sid=en
فایل مقاله فایلی برای مقاله ذخیره نشده است
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Radiation Biology
نوع مقاله منتشر شده تحقیق بدیع
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات