Low-dose CT thorax examination can accurately detect the initial and smaller tumors, and can find tumors and roughly distinguish them from benign and malignant, with high accuracy.
High-risk individuals such as those over 50 years of age, who smoke frequently , secondhand smoker, or have a family history should have a low-dose thorax CT scan every year to reduce the risk of death from lung cancer. When the lung image overlaps with the heart or other tissues can be avoided , details can also be clearly seen. Early tumors as small as 3 mm in diameter can be detected with high accuracy.