Abstract
Clinical symptoms of primary lung cancer are frequently unobserved in not only the early stages but also relatively advanced stages of the disease. Primary lung cancer is often first revealed by a mass screening or imaging diagnosis of the chest region because of another other diseases. The chest computed tomography (CT) diagnosis is considered to play a great role in the diagnosis of lung cancer. With the recent introduction of FDG-PET and the newest MRI in the diagnosis of lung cancer, attempts have begun to be made to apply these techniques to the qualitative diagnosis of lung cancer. In actual clinical practice, however, the chest CT still plays a major role in not only screening but also qualitative diagnosis. With the spread of lung cancer screening using chest CT, many small pulmonary lesions have been detected. The role of the qualitative diagnosis based on high resolution CT images is becoming increasingly important. This paper describes the qualitative diagnosis and stage diagnosis using chest CT in the diagnosis of lung cancer by comparing CT findings with pathological findings.
