Depending on which organ is examined, the technique of the procedure is determined. When examining the esophagus and stomach, as a rule, they first make a survey x-ray of their walls, after which they give several sips of prepared barium and produce a primary sighting picture. It allows you to better see their relief.
Next, you need to drink a whole drink (for adults up to 300 ml, for children - 100 ml). The doctor can massage the epigastric region to help the substance evenly distribute throughout the stomach.
The radiologist removes the patient lying on his back, side, with a raised pelvis, standing. 
X-ray of the esophagus with barium
The esophagus is examined in case of violation of the swallowing process, pain in the chest of an incomprehensible nature, ingress of a foreign body, suspicion of a hernia. The procedure is performed while standing with the absolute immobility of the patient. The moment of swallowing the solution and complete filling of the organ is estimated. The picture is very informative and allows you to identify many pathologies, and also evaluates the patency of the esophagus, the elasticity of its walls, the nature of the contours, etc.
X-ray of the intestine with barium
The examination of the intestine takes place in several stages. The patient is offered to drink half a liter of barium suspension, if necessary, double contrasting is also supplied through the tube with air or an inert gas. The procedures are preceded by 2 hours of waiting, which is how long it will take for the contrast agent to reach the small intestine. The radiologist takes a series of pictures in various positions of the body. After defecation, one last control picture is taken.
What do they let you see? The film shows the mucous wall of the intestine, its relief, the dynamics of the movement of barium is traced, that is, its motility is determined, inflamed areas, neoplasms, diverticula, ulcerative processes, and malabsorption are detected.
X-ray of the large intestine with barium
An X-ray of the large intestine with the participation of barium is prescribed to confirm the diagnoses: colitis, appendicitis, intestinal obstruction, tumor, inter-intestinal abscess, etc. The patient drinks a glass of solution the day before, no other preparation is required.
Often, another procedure is carried out in parallel - barium enema, during which barium is injected with an enema. First, the intestines are cleansed to clean water, dinner and breakfast are canceled the day before. The enema solution is heated to 35 0 C, its volume is 1.5-2 liters.
The procedure is very unpleasant, there is an urge to defecate, painful spasms, a feeling of fullness. Doctors recommend breathing deeply through your mouth and enduring, otherwise all efforts may be in vain. For a better distribution of the staining substance through the intestines, it is necessary to change positions with photofixation of the organ. After emptying the bowels, another control picture is taken.
This method allows you to examine the rectum and anus. It shows the shape of the organ, its extensibility, patency, location, elasticity.
X-ray with barium for a child
Radiography with contrast for children is carried out in emergency cases in case of suspicion of abnormal development of organs or ingestion of a foreign object. Barium is not used in the first months of a child's life due to the radiation exposure of the substance. Its role is performed by fat- or water-soluble drugs.