CT examination can be done for diseases of the urinary system. CT examination has higher resolution and clearer tissue resolution, and it can be used to clarify whether there is an occupying disease, and it can be further examined by enhanced CT or 3D reconstruction of CT to clarify whether there is a suspicious lesion in the urinary tract. Clinically, it is often used in the examination of tumors or malformations of the urinary system, and also in the examination of stones in the urinary system, because CT examination has a certain three-dimensional structure, which can clarify the relationship between the lesion and the kidney or with the ureter, bladder and other organs of the urinary system, and can also clearly see the blood vessels of the urinary system, and further determine the relationship between the relevant lesion and the blood vessels, etc. It is especially suitable for urology. Because surgery sometimes requires surgical treatment, it is necessary to know the three-dimensional structural relationship between the lesion and the normal urinary system, so the urological system can be examined by CT, which has a higher accuracy and precision.