Barium meal examination showing the stomach and duodenum in double contrast technique with CO2 as negative contrast medium Barium follow through showing the small bowel Enteroclysis in double contrast technique showing stenosis of the small intestine Various types of barium X-ray examinations are used to examine different parts of the<unk>  tract. These include barium swallow, barium meal, barium follow-through, and barium enema. The barium swallow, barium meal, and barium follow-through are together also called an<unk>  (or study), whereas the barium enema is called a lower<unk>  series (or study). In<unk>  examinations, the barium sulfate is mixed with water and swallowed orally, whereas in the lower<unk>  series (barium enema), the barium contrast agent is administered as an enema through a small tube inserted into the rectum. * Barium swallow X-ray examinations are used to study the pharynx and esophagus. * Barium meal examinations are used to study the lower esophagus, stomach and duodenum. * Barium follow through examinations are used to study the small intestine. * Enteroclysis, also called small bowel enema, is a barium X-ray examination used to display individual loops of the small intestine by intubating the jejunum and administering barium sulfate followed by methylcellulose or air. * Barium enema examinations are used to study the large intestine and rectum and are classified as lower<unk>  series.
Upper gastrointestinal series
Lower gastrointestinal series
Electrogastrogram
Capsule endoscopy
Magnetogastrography
GI cocktail
Gastric emptying scan
Enteroscopy