After the lung nodules are found on physical examination, the following procedures can be followed to deal with them: 1, suspicious or sure nodules in the lungs are found on chest X-ray, if there are nodules on chest X-ray in previous years and the lesions are not increasing, the chest X-ray can be followed up once a year; if it is a new nodule shadow, CT examination is needed. 2, conventional CT is 5 ~ 10mm layer thickness, for more than 30mm masses show more clearly, for 5 ~ 30mm between the nodular shadow shows poorly, can not provide doctors with sufficient diagnostic basis, need to do a thin layer 1 ~ 2mm scan, general 16 row and above CT can do this, but many general hospitals do not take this technology as a routine, and pulmonary doctors need to the lesion Accurate characterization is needed, especially to understand minute details such as calcified spots, vacuolar signs, vascular collection signs, liquefied necrosis, pleural traction signs, and even 3D reconstruction of the images to understand the three-dimensional features. The general images are in JPG format, the so-called normal photo format; imaging physicians especially need raw data in DICOM format in order to post-process the images, which is understood by all CT technicians, and you can bring these images through their copies for consultation. 3, after the discovery of lung lesions need to determine whether it is a benign lesion, which is definitely a test of the doctor’s ability and psychological quality, the general doctor will not explicitly say, benign and malignant 3/7 open and such analysis is acceptable. 4, benign nodules more performance edge light neat, uniform density, more like a ping pong ball; malignant nodules often have burrs, lobulated, more like a hedgehog. 5.Nodules around the chest wall are difficult to diagnose, puncture, thoracoscopic biopsy, open chest biopsy can clarify detailed pathological diagnosis, but they are invasive examinations, if malignancy is not suspected these examinations should be avoided. Chest X-ray, CT, PET-CT, MRI, enhanced CT, thin layer CT, 3D reconstruction CT are helpful for diagnosis, but they are extremely demanding for doctors to analyze benign and malignant through traces and provide next suggestions for patients. 6. Patients are eager to get advice from their doctors including whether the nodule is lung cancer? Can it be operated? How much will it cost? How long can they live? In fact, it is difficult for doctors to answer these questions, after all, doctors are not immortals, good doctors can give reasonable advice. Good economic conditions can do PET, the cost of about 7000 yuan, from the surgery out of the survival of more than 3 years can basically guarantee, 70% after 5 years can always live.