2.0 OBJECTIVES AND PURPOSE Prompt detection of gastric cancer precursors enables early detection and less invasive treatment options such as endoscopic resection. Narrow band imaging is a completely noninvasive technique which uses filtered light to enhance assessment of mucosa. Our aim is to gauge whether biopsies targeted by narrow band imaging improves the detection of gastric intestinal metaplasia and gastric dysplasia relative to standard white light techniques on a per patient basis. A secondary aim will be to assess whether the technique is amenable to standardization so that it might be used more broadly to identify patients with early gastric neoplasia. While NBI is built into the vast majority of endoscopes in use few physicians are aware of its potential use.