乳腺癌是女性常见恶性肿瘤,在美国40~55岁的女性,乳腺癌占女性死因的首位,在我国乳腺癌的发病率呈上升趋势。乳腺癌的临床研究是各种肿瘤中研究最细致、大规模随机研究最多的病种之一,放射治疗已成为乳腺癌主要的治疗手段之一[1],在各期乳腺癌治疗中发挥其应有的治疗作用,如早 Breast cancer is a common malignant tumor in women in the United States 40 to 55-year-old women, breast cancer, the leading cause of death in women, the incidence of breast cancer in our country is on the rise. Clinical research of breast cancer is one of the most detailed and large-scale randomized studies in all kinds of tumors. Radiation therapy has become one of the main treatments for breast cancer [1], which plays an important role in the treatment of breast cancer Should have the therapeutic effect, such as early