“Enhanced CT of the abdomen is a method of detecting lesions of the liver, spleen, gallbladder, pancreas, kidneys and other abdominal organs, which is needed when there is some kind of space-occupying lesion that cannot be diagnosed by ordinary CT, and it mainly includes: preparation, injection of contrast medium, examination of films, and post examination. It mainly includes: preparation, injection of contrast medium, film taking, post examination work, etc. 1. Preparation: Ask the patient whether he/she has any allergy history, and conduct iodine allergy test for the patient. 2. Injection of contrast agent: let the patient lie on the examination bed, do the routine scanning before the examination, and then use the high-pressure syringe to inject the contrast agent into the patient’s body through the vein. 3. Examination film: About 23 seconds after the injection, the patient is instructed to start breath holding, and the arterial phase is scanned in about 30 seconds, the venous phase is scanned in about 45 seconds, and the delayed phase is scanned if necessary (the delayed phase is determined by the nature of the lesion to determine the scanning time). After injecting the contrast agent, the portal phase and equilibrium phase scans are performed. After the scanning examination, the patient needs to be observed in the observation room for about 30 minutes. 4. Completion of the examination: After the abdominal CT, the patient is instructed to drink plenty of water, which will help the contrast agent to be discharged. Abdominal enhanced CT can clearly show the internal microstructure of the lesion, the blood supply of the lesion, and whether there is infiltration of the lesion and neighboring organs, which is of great clinical significance and value in determining the nature of the lesion and in differential diagnosis. However, it should be contraindicated for those who are allergic to contrast media and pregnant women.