The squamo-columnar junction or Z-line (where the 'whitish' esophageal squamous mucosa finishes and the reddish gastric columnar mucosa starts). The esophagogastric junction or lower esophageal ...
NBI is a real-time, on-demand endoscopic imaging technique designed to enhance visualization of the vascular network and surface texture of the mucosa. [8] NBI images are provided by feeding the ...