据专家估计，每个妇女的一生约有６％～９％的机会患乳腺癌，因此，美国癌症协会（ＡＣＳ）从２０世纪７０年代开始研究在无症状妇女中发现乳腺癌的普查计划，经１０多年研究，已证实乳腺自我检查（ＢＳＥ），乳腺临床检查和乳腺Ｘ线照片作为三种有效的普查方法，并制订出不同 Experts estimate that every woman’s lifetime has about 6% to 9% of her chances of developing breast cancer. Therefore, the American Cancer Society (ACS) began researching a screening program for breast cancer in asymptomatic women in the 1970s. Over 10 years of research, breast self-examination (BSE), breast clinical examination and mammography have been confirmed as three effective census methods and different