Could near focus endoscopy, narrow-band imaging, and acetic acid improve the visualization of microscopic features of stomach mucosa?

Figure 3 Near focus, narrow-band imaging mode from the point of view of the first observer. A and B: Near focus (NF)-narrow-band imaging (NBI)-1a pattern and NF-NBI-2a pattern show a clear appearance of the regular arrangement of collecting venules (white arrow), subepithelial capillary network (black arrow), gastric pits (square), and crypt opening (green arrow, right upper corner); C: NF-NBI-b pattern shows a clear appearance of the subepithelial capillary network (black arrow) and gastric pits (square). A less clear appearance of the crypt opening (green arrow, right upper corner) is observed.