barium swallow procedure ugi throat bowel therapy by fluoroscopy devices

anatomy background barium barretts biology body bowel cancer cervical cray design devices diagnose diagnosis diagram difficulty digestion digestive disease duodenum dysphagia esophageal esophagus exam examination examining film fluoroscope fluoroscopy fundus gastric gastritis gastrointestinal gerd gi health healthy human illness illustration internal intestine medical medicine mucosa organ patient peristalsis pharynx procedure science series spine stomach structure study swallow swallowing test therapy throat tongue tract tumor ugi ulcers