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International Journal of Radiation Research، جلد ۸، شماره ۲، صفحات ۹۳-۱۰۱
عنوان فارسی
چکیده فارسی مقاله
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عنوان انگلیسی Evaluation of the physical characteristic of Cerrobend blocks used for radiation therapy
چکیده انگلیسی مقاله Background: In Radiation Therapy, the sparing of normal tissues can be performed using either multi-leaf collimators or Cerrobend blocks. The current work focuses on the physical characteristics of Cerrobend blocks including attenuation coefficient, effective penumbra width and isodose curves undulation in penumbral regions. Materials and Methods: All measurements were performed using a dual energy linac and the Cerrobend blocks designed and fabricated using a commercial Cerrobend material. Data were collected using a calibrated ionization chamber as well as EDR2 films. Results: The results showed that the attenuation coefficient was found to be 0.4475 and 0.4276 cm-1 for photon beams 6MV and 15 MV, respectively, and a potential air bubble with a diameter greater than 3 mm affects beam attenuation significantly. The optimum Cerrobend block width was found to be around 16 mm. The isodose curves scalloping achieved for secondary collimator jaws, were also similar. Conclusion: If Cerrobend blocks are used as a basic method to protect normal tissues, its physical characteristics will be recommended to be taken into account comprehensively. Iran. J. Radiat. Res., 2010 8 (2): 93-101
کلیدواژه‌های انگلیسی مقاله Beam collimation, block-cutter, Cerrobend blocks, shielding.
نویسندگان مقاله a طاهرخانی | a. taherkhani
department of biophysics, science amp;amp; research campus, azad university, tehran, iran


m محمدی | m. mohammadi
department of medical physics, faculty of medicine, hamadan university of medical sciences, hamadan, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (Hamadan university of medical sciences)

محمدصادق صبوری | m s saboori
department of medical physics, faculty of medicine, the university of erlangen, erlangen, germany


v چنگیزی | v. changizi
department of medical physics, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

نشانی اینترنتی http://www.ijrr.com/browse.php?a_code=A-10-1-356&slc_lang=en&sid=en
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زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده فیزیک پزشکی
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