临床研究认为，对于乳腺癌原发灶＞５ｃｍ，皮肤有水肿、破溃、红斑、与胸肌固定、腋窝淋巴结转移＞２０％或≥４个者，术后放疗并照胸壁，可降低胸壁复发率，提高远期生存率。乳腺癌根治或改良根治术后的胸壁照射，一般均采用电子线，为了给电子线照射的能量选择提供可靠... Clinical studies believe that for breast cancer> 5cm, skin edema, ulceration, erythema, and pectoral muscle fixation, axillary lymph node metastasis> 20% or ≥ 4, postoperative radiotherapy and according to the chest wall, can reduce the chest wall recurrence rate , improve long-term survival. Breast line irradiation after radical mastectomy or modified radical mastectomy generally uses electronic wires to provide reliable power for the selection of electron beam radiation.