victorwang0000,你说“几乎就是给假阳性留有余地的”,可是假阳性往往很高。我没有特别去查,随便看到下面这篇paper就指出screening for lung cancer using computed tomography (CT) scans can yield a high rate of false-positive results. 这个是美国的结果,但是用的都是CT技术,应该不存在中美差异吧,有差异也是个体差异而不是医学技术教育导致的差异。
Croswell JM, Kramer BS, Kreimer AR, et al. Cumulative incidence of false-positive results in repeated, multimodal cancer screening. Annals of Internal Medicine. 2009 May-Jun;7(3):212-22.