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Capsule endoscopy procedure. (A) Capsule endoscopy in the stomach. Greater curvature fold is observed in the wide gastric lumen; (B) after passing through the pylorus, CE enters into the small intestine, showing the Kerckring fold and intestinal villi; (C) ileocecal valve is located at the end of the small intestine; thereafter, the circular fold in the colon is seen. CE, capsule endoscopy.
