Why is it difficult to characterize a small lung nodule? To better differentially diagnose lung nodules, doctors need to determine the benign and malignant nature of lung nodules based on the location, size, density, shape, presence or absence of calcification, lobulation, burr, pleural depression, etc. on CT scans. Simply put, the edges of benign nodules are smooth and clear, while the edges of malignant nodules are irregular and appear to have short, thin burrs. These methods are very accurate for larger nodules, but they are difficult for smaller nodules, especially those with a ground glass density of 25px or less. The reason is that small ground-glass nodules have little internal cellular component and do not have obvious morphological features on conventional CT to determine the benign or malignant nature, and most of them require long-term CT follow-up to provide a diagnostic basis. Some patients may suffer from psychological anxiety or even delay during the follow-up period. What kind of technology is scanning? In recent years, we have developed a unique CT imaging technique for small pulmonary nodules, referred to as 1024 scan.1024 scan is an ultrathin scan and image reconstruction examination technique, specifically using the latest ultra-high resolution CT for data acquisition and 3D reconstruction of small pulmonary nodules. The scan does not require contrast injection, but some parameters will be precise in imaging to maximize spatial resolution. It is mainly used to observe the microstructure of lesions and is a complement to conventional chest scans. 1024 scans can clearly show the fine structure of lung tissue (airways of small lung lobes, blood vessels and interlobular septa, interstitium and small intra-pulmonary nodules at millimeter level, etc.) and achieve morphological changes almost similar to those of large specimens, displaying small lung nodules more clearly and diagnosing them more clearly, and therefore in the practical clinical application of lung nodules The accuracy is extremely high. Why is the scan accurate in determining the nature of lung nodules? Our own 1024 scan is a comprehensive target scan imaging technique with the following main technical parameters: sub-millimeter thin layer, scan matrix 1024×1024, small field of view 250mm (smaller reconstruction field of view), physiological ventilation assistance and iterative reconstruction noise reduction. Under these conditions, the pixel size of the image = 250 ÷ 1024 = 0.24 mm, which is 16 times smaller than that of a conventional scan = 500 ÷ 512 = 0.98 mm, and thus the spatial resolution is greatly improved. The post-image processing of this method is also different from the general CT, with a unique image processing method, which has better resolution and more intuitive expression, and is more helpful for the qualitative diagnosis of pulmonary ground glass nodules. The scan can better display the morphological features of lung nodules, assess the margins and infiltration of lung nodules, probe the internal structure of nodules, assess the vascular growth status, and calculate the volume doubling time. 1024 scans can accurately determine the nature of lung nodules and help in the identification and diagnosis of early lung cancer. Our clinical practice in recent years has shown that this technique has obvious advantages for early diagnosis of lung cancer, and more and more early stage lung cancers with in situ and small infiltrations have been detected and surgically removed in time, so that patients can achieve complete cure and early stage lung cancer can be invisible.