Lung enhancement ct can initially determine whether the tumor is benign or malignant, but cannot be used as a means of confirming the diagnosis. Lung enhancement ct is currently one of the commonly used clinical imaging modalities, mainly through the injection of contrast medium in the patient’s vein, so that the contrast medium into the blood vessels in the area of lung tumors, and then through the ct examination to observe the difference between the blood flow between the lung tumor and the surrounding normal tissues, to help determine the nature of the tumor. In most cases, benign tumors in the lungs have fewer blood vessels, and the enhanced ct examination often suggests mild enhancement, while malignant tumors have more blood vessels, and with the development of the disease will continue to produce new small blood vessels, so the results of the examination often suggest significant enhancement. Therefore, lung enhancement ct can initially determine whether the tumor is benign or malignant. However, there are some benign lung tumors with more blood vessels and rich blood flow signals, which can suggest mild or moderate enhancement, while some malignant tumors with fewer blood vessels in the early stage can also suggest moderate enhancement or even mild enhancement, so lung enhancement ct can not be used as a means to determine the nature of the tumor. The main clinical purpose of lung enhancement ct is to observe whether there are tumors in the patient’s body that cannot be detected by ordinary ct and have no obvious characteristics. If the patient finds that there are tumors in the lungs, it is necessary to judge their nature through pathological examination in time.