این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
Iranian Journal of Medical Physics، جلد ۱۵، شماره Special Issue-۱۲th. Iranian Congress of Medical Physics، صفحات ۳۷۴-۳۷۴
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Measurement Of Scatter Factors For Small Photon Fields Using Gaf chromic EBT2 Film
چکیده انگلیسی مقاله Introduction: Small field dosimetry is challenging for radiotherapy dosimetry. measurement of the output factor in the air and water (Sc, Scp) is one of the input parameters for commissioning of treatment planning systems and beam modeling. The aims of this study are to measured Sc,Scp for small fields with EBT2 and Ion chamber and design a appropriate mini-phantom for small fields dosimetry with EBT2 film. Materials and Methods: output factors in air and water were measured for Siemens linear accelerator 6Mv energy and fields sizes (1-20cm) which irradiated by 200MU. Measurements were performed using a gafchromicfilm EBT2 and 0.6cc Farmer ion chamber and then the results were compared with Report of AAPM Group74 and TG155. For lateral electron equilibrium and electron contamination removal, two top of the water and Cerrobend were designed for film dosimetry and plexiglass buildup cap for Farmer chamber was applied. Results: It was observed that In-air output factors increased with field size, and this increase in Cerrobend top is less than water top and Farmer dosimeter.Sc measured in small field is good agreement with data TG74 (0.5%), also Scp result were compared with data TG155(4.1%), and the response of the film to the Ion chamber isalso in good agreement showed (2.4%). Conclusion: EBT2 film in measured output factors in air and wayer for small field as a good alternative to ion chamber dosimeters known as a standard dosimeter.
کلیدواژه‌های انگلیسی مقاله
نویسندگان مقاله | Fariba Eyni
Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.


| Nahid Chegeni
Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.


| Mohammad Javad Tahmasebi Birgani
Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.


| Seyed Mojtaba Hosseini
Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.


| Maryam Atarod
Department of Medical Physics, School of Medicine, Shahrekord University of Medical Sciences, Shahrekord, Iran.
نشانی اینترنتی http://ijmp.mums.ac.ir/article_13038.html
فایل مقاله فایلی برای مقاله ذخیره نشده است
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده Conference Proceedings
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات