Clinical applicability of gastroscopy with narrow-band imaging for the diagnosis of Helicobacter pylori gastritis, precancerous gastric lesion, and neoplasia

Figure 1 Narrow-band imaging system. When the button is pressed by the endoscopist, the endoscopy monitor changes from white-light imaging to narrow-band imaging (NBI) mode. Compared to the magnification mode without NBI (upper-right panel), NBI enables examination of the mucosal surface and microvessels around the erosion (lower-right panel).