What is angiography

Contrast examination: For structures or organs lacking natural contrast, substances with densities higher or lower than the structure or organs can be introduced into organs or shared network Spaces to produce contrast. Development is the contrast examination. The introduced substances are called contrast agents or contrast agents. Most contrast media contain iodine, iodine allergy should be careful.

Angiographic examination is to introduce a substance with a higher or lower density than the human body into the parts to be examined. The difference in the density of the parts to be examined will be caused by the human site, so as to form a comparison and achieve the purpose of diagnosis. Before contrast examination, patients should make necessary preparations, such as stomach barium meal examination, because there is food in the stomach will cause illusion, affecting the quality of the examination. A clean enema should be performed before a barium enema to remove stool from the intestine.