Having a suspicious disease usually means that there is a suspicious lesion, which requires lung CT, and further biopsy if necessary, to clarify the condition and timely treatment, which can improve the patient’s prognosis. Lung CT is a commonly used clinical examination modality, which scans the lungs in layers through X-ray examination and transmits the scanning information to the computer to form an image, which can show the size, density, morphology of the lesion site and its relationship with the surrounding tissues, etc., and help to assist in the diagnosis of inflammation, tumors, cysts, fluid retention and other medical conditions. When suspicious lesions appear in the lungs, it is recommended that patients should undergo lung CT examination, which helps clinicians to make a clear diagnosis. If the CT examination of the lungs suggests that the suspicious lesions in the lungs have irregular edges, are not clearly demarcated from the surrounding tissues, have burr-like shadows, have lobular signs, and have pleural pulling manifestations, the lesions have a high likelihood of malignancy, and biopsy of the lesions is feasible in order to make a clear diagnosis if necessary. When there are suspicious foci in the lungs, patients should consult a doctor in time to clarify the condition, such as malignant tumors, can be treated under the guidance of a professional physician, so as to avoid delaying the condition leading to adverse consequences.