Application and progress of computer aided detection and diagnosis on CT in early stage lung cancer

With the development of CT scan technology, the detection rate of early stage lung cancer has significantly raised. In recent years computer aided detection (CADe) and computer aided diagnosis (CADx) system on CT has come to be 'the second eyes' of radiologists. It can identify lung nodules on chest CT by itself, and can automatically measure nodule size, density and other information to provide a likelihood of malignancy or benignity. In this article we mainly reviewed the basic method and function of CAD, and its clinical application and research progress. (authors)