Barley meal
Barium meal is barium sulfate emulsion, can assist in X-ray imaging. Barium sulfate emulsion after being drunk by the patient can be attached to the wall of the digestive tract, blocking the X-ray through, commonly used to show the shape of the esophagus and stomach. Barium sulfate will not be digested, and will be excreted together with the feces. Similarly, there will be barium sulfate emulsion enema, known as large bowel barium enema. ...