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International Journal of Radiation Research، جلد ۶، شماره ۱، صفحات ۳۱-۳۶
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| عنوان انگلیسی |
Verification of dose rate and energy dependence of MAGICA polymer gel dosimeter with electron beams |
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| چکیده انگلیسی مقاله |
Background: The purpose of this study was to evaluate the dependency of MAGICA polymer gel dosimeter response (R2) on different electron energies as well as on different mean dose rate for a standard clinically used linear accelerator. Materials and Methods: The sensitivity of the dosimeter was represented by the slope of calibration curve in the linear region measured for each modality. A calibration curve (in the linear region) based on 12 dosimeters (11 irradiated and one blank) was obtained for 6 MeV electron beam. Dosimeter energy dependence was studied for electron energies of 4,6,12 and 18 MeV. Dose rate dependence was studied in 10 MeV electron beam with the use of dose rates 80,160,240,320,400 and 480 cGymin-1. Evaluations of dosimeters were performed on Siemens Symphony, Germany, 1.5T Scanner in the head coil. A multiecho sequence with 32 equidistant echoes was used for the evaluation of irradiated polymer gel dosimeters. The parameters of the sequence were as follows: TR 3000ms, TE 20ms, Slice Thickness 4mm and FOV 256mm. Results: Polymer gel dosimeter response R2 was increased with increasing electron energy. No trend in polymergel dosimeter R2 dependence was found on mean dose rate for electron beams. Conclusion: In MAGICA polymer gel, the sensitivity is dependant on electron energy increase, but no dependence was observed on response to dose rate. The presence of antioxidant and oxygen scavengers in the MAGICA polymer gel is believed to cause different results. Iran. J. Radiat. Res., 2008 6 (1): 31-36 |
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| نویسندگان مقاله |
k آدینه وند | k. adinehvand
borujerd islamic azad university, borujerd, iran
سازمان اصلی تایید شده: دانشگاه آزاد اسلامی علوم و تحقیقات (Islamic azad university science and research branch)
محمدحسین زحمتکش | m h zahmatkesh
novin radiation medicine institute, tehran, iran
محمدرضا آقامیری | m r aghamiri
division of radiation medicine, shahid beheshti university, tehran, iran
سازمان اصلی تایید شده: دانشگاه شهید بهشتی (Shahid beheshti university)
sh akhlaghpour | sh. akhlaghpour
department of radiology, tehran university of medical sciences, tehran, iran
سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)
s باقری | s. bagheri
novin radiation medicine institute, tehran, iran
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| نشانی اینترنتی |
http://www.ijrr.com/browse.php?a_code=A-10-1-269&slc_lang=en&sid=en |
| فایل مقاله |
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| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
Radiation Biology |
| نوع مقاله منتشر شده |
تحقیق بدیع |
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