There are many types of imaging examinations, so the practice varies. The following are some of the commonly used imaging methods: i. Gastrointestinal imaging, oral administration of barium sulfate contrast on an empty stomach, followed by X-ray; ii. Coronary angiography, which requires the injection of contrast into the blood vessels, followed by scanning under CT; iii. Fallopian tube imaging, which involves the injection of contrast into the vagina, followed by the visualization of the uterus and bilateral fallopian tubes to determine whether the fallopian tubes are patent and other The ureterogram is performed by intravenous injection of a contrast agent. There are many other imaging tests, each of which is performed in a slightly different way.