Computer-Aided Diagnosis Systems for Lung Cancer: Challenges and Methodologies

Figure 1

Typical computer-aided diagnosis (CAD) system for lung cancer. The input of a CAD system is the medical images obtained using an appropriate modality. A lung segmentation step is used to reduce the search space for lung nodules. Nodule detection is used to identify the locations of lung nodules. The detected nodules are segmented. Then, a candidate set of features, such as volume, shape, and/or appearance features, are extracted and used for diagnosis.