Using TLD in determining the absorbed dose in the area outside the irradiation region after mastectomy

Introduction: The most common cancer in women worldwide is breast and radiotherapy the best treatment choice after mastectomy.1,2 In radiation therapy mastectomy, depending on type of tumor, area removed goes under radiotherapy. Methods: TLD (Thermoluminescence Dosimetry) chips were used this project. Typically, each patient an irradiation 200 cGy during 25 sessions received a total 5000 cGy. Radiation therapies performed such way that was subjected to 10 MV photovoltaic radiations 10×10 Cm2 mastectomy region. Meanwhile, according depth tumor inside chest, gamma rays cobalt 60 surrounding regions. absorption dose coefficients same obtained from 10MV beam 60. Results: Then absorbed as calculated by hospital dosimeters standard compared with measured TLD. areas determined zero doses Hospital non-zero There also where different standard. Conclusion: To reduce possibility side effects additional radiation, it suggested final absorption, which for radiotherapy, be outside treated area, too.