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Radiation-Associated Cardiotoxicity during Breast Cancer Treatment with Ionizing Radiation

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2023年第1期12卷 28-36页

作者： Besim Xhafa Fesal Selimi doriana berberi paloji Ylli Kaçiu Blerim Rrakaqi Alma Mater Rezonanca Campus College “Rezonanca” Prishtina Kosovo University Clinical Center of Kosovo Prishtina Kosovo

Introduction: Breast cancer is the most common cancer in women. The treatment of breast carcinoma has advanced in the last decade and nowadays there are treatment protocols for all stages of the disease. Depending on the histopathology and stage breast cancer is treated with surgery, chemotherapy and radiotherapy. Regarding radiation, the field of irradiation includes the chest wall in patients with mastectomy, or the breast glandular tissue in patients with conserving surgical approaches. It is often treated with radiation therapy with two opposing tangential fields, and when indicated supraclavicular lymph nodes have to be irradiated. In this case an additional anterior field is applied. The tangential as well as the other radiation beams have a potential damaging effect on the healthy surrounding tissues, particularly over the heart in the left breast irradiation and in the lungs as well. Material and Methods: The study included 25 patients with left breast carcinoma, all post surgery, treated with radiation therapy, with the Elekta accelerator at our department. For academic purpose the treatment plans were generated following two methods. The first one with two tangential opposite beams plus a supraclavicular beam. In this method the angles of the tangential internal and external create an angle that is equal to 180˚{310˚& 130˚};no further changes were made to the beam geometry. Even though this is not the best option from the dose distribution point of view, it is still the most applied method, probably because of the semplicity of it. For each patient, a second plan was generated using two opposite tangential beams plus the supraclavicular beam. The angles of the internal and external beam were changed from 1˚to 3˚, depending on the surface of the body, so that the resulting angle was 180˚± 3˚{310˚± 3˚& 130˚± 3˚} with the aim to adapt the beam geometry as much as possible to the shape of the thoracic wall

关键词： Radiation Dose Brest Cancer Heart Gentry Angle

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