This 3D medical animation shows an upper GI (gastrointestinal) endoscopy procedure to diagnose the presence of helicobacter pylori causing a stomach (gastric) ulcer.Endoscopy means looking inside and typically refers to looking inside the body for medical reasons using an instrument called an endoscope. Endoscopy can also refer to using a borescope in technical situations where direct line-of-sight observation is not feasible.