CT contrast enhanced scan

Enhanced CT angiography: It is a method of injecting a certain amount of iodine-containing water-soluble contrast agent into a vein at the same time or immediately after the CT scan. Although plain CT has a higher density resolution than ordinary X-ray examination, it still has Some lesions show equal density changes on plain CT scans, or lesions that have been shown on plain CT scans, but it is not clear whether their blood supply is abundant, so it is necessary to use angiography to enhance the lesions.