Cervical inlet patch-optical coherence tomography imaging and clinical significance

Figure 3 Three-dimensional-optical coherence tomography images of a normal gastro-esophageal junction. A: En face projection optical coherence tomography (OCT) image at a depth of 350 μm; B: Regions with gastric mucosa and squamous mucosa show distinct features; Cross-sectional OCT image along the probe pullback direction showing the gastro-esophageal junction (GEJ) and normal squamous epithelium (SE) clearly; C, D: Cross-sectional images of the GEJ and SE, corresponding to the green and blue dashed lines marked in (A), respectively. Structures, such as SE, lamina propria (LP)/muscularis mucosa (MM), esophageal glands (arrows) (EG), and gastric mucosa, can be clearly identified; E: Representative histology at the GEJ. Scale bars: 1 mm.