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International Journal of Radiation Research، جلد ۱۳، شماره ۲، صفحات ۱۶۵-۱۷۱
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عنوان انگلیسی Monte Carlo calculation of shielded colpostat effect on rectum received dose in high dose rate brachytherapy with Cobalt-60 sources
چکیده انگلیسی مقاله Background: In the current study the effect of shielded colpostat on rectum received dose was calculated in cervical brachytherapy using Monte Carlo (MC) method. Materials and Methods: Two 60Co sources of GZP6 brachytherapy unit used for intracavitary treatments were simulated using MCNPX Monte Carlo code. Also the two types of colpostats including shielded and unshielded were simulated inside a water phantom. The radial dose function, depth doses and dose distribution around sources were calculated with spatial dose resolution of 2×2×2 mm. The effect of tungsten shields on rectum dose was studied. Moreover, the accuracy of treatment planning system (TPS) was verified comparing to MC results. Results: Our results showed that shielded colpostats reduce the rectum dose up to 7% according to the MC calculations. Also, it was found less than 3% difference between TPS and MC results in percentage depth dose and radial doses for unshielded case. Conclusion: It can be concluded that the application of shielded colpostats provide a relatively mild protection (7% reduction in dose) for the rectum in intracavitary brachytherapy due to the higher energy of 60Co photons. However, application of shielded colpostats in treatment planning system is desirable for more accurate treatments.
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نویسندگان مقاله a مصباحی | a. mesbahi
medical physics department, medical school, tabriz university of medical sciences, tabriz, iran

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

a حق زاده | a. haghzadeh
engineering faculty, medical radiation engineering department, azad university, science and research branch, tehran, iran

سازمان اصلی تایید شده: دانشگاه آزاد اسلامی علوم و تحقیقات (Islamic azad university science and research branch)

علیرضا ناصری | a r naseri
radiation oncology department, imam hospital, tabriz, iran


علیرضا ناصری | a r naseri
engineering faculty, medical radiation engineering department, azad university, science and research branch, tehran, iran

سازمان اصلی تایید شده: دانشگاه آزاد اسلامی علوم و تحقیقات (Islamic azad university science and research branch)

نشانی اینترنتی http://www.ijrr.com/browse.php?a_code=A-10-1-556&slc_lang=en&sid=en
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کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Radiation Biology
نوع مقاله منتشر شده تحقیق بدیع
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