One of the major limitations of CT screening is the number of screens in which a nodule or other indeterminate finding potentially related to lung cancer is found.

Results The incidence of vessel convergence was 88.5%(46/52) in the peripheral small lung carcinoma, and 18.2%(4/22) in benign lung nodule, both of which differed significantly(P<0.001).

It is suggested that DR/CR assisted by the real-time interactive pulmonary nodule analysis system may be an effective means to screen large populations for lung cancer.