Enhanced CT is a way of CT examination, it is relative to the ordinary plain CT, it is a kind of examination method based on plain CT, by injecting contrast agent for patients intravenously, using the difference of blood supply characteristics between lesions and normal tissues, so as to determine the nature of lesions, it can use any kind of machine for examination, and spiral CT is only one type of CT machine. At present, most of the clinical use is spiral CT, such as 16-row spiral CT, 64-row spiral CT, etc. Compared with the ordinary double-row spiral CT, its scanning time is shorter, the image of the examination is clearer, and the radiation to the human body is also smaller, and the current enhanced CT is also mainly enhanced on the basis of the spiral CT scan.