Association between mucosal surface pattern under near focus technology and Helicobacter pylori infection

Figure 1 Standard high definition examination. A: Atrophy in the lesser curvature of the gastric body; B: Erythema of gastric body.

Figure 2 Near focus examination of gastric body. A: Type 1: regular arrangement of collecting venules and regular round pits; B: Type 2: regular round pits, with erythema, sulci and loss of collecting venules; C: Type 3: loss of normal subepithelial capillary network (SECN) and collecting venules and with white enlarged pits surrounded by erythema and exudate; D: Type 4: loss of normal SECN and round pits, with irregular arrangement of collecting venules.

Figure 3 Study flowchart. PPI: Proton pump inhibitor; NF: Near focus.