An imaging test is a more complex test that involves the introduction of a contrast agent into the organ being examined in the body and then the examination. Therefore, its cost includes two parts: one, the cost of the imaging test; and two, the cost of the contrast agent introduced. The cost of different imaging examinations is different, for example, the cost of gastrointestinal imaging is about 200-300 RMB; the cost of ureterography is also about 200-300 RMB; the cost of 64-row spiral CT coronary angiography is about 1000 RMB; the cost of ureterography is about 400-500 RMB. So it varies from one imaging to another. It also varies with the price standard of the hospital, the model used and the contrast agent used.