Cervical inlet patch-optical coherence tomography imaging and clinical significance

Figure 4 Three-dimensional-optical coherence tomography images of a long segment Barrett's esophagus. A: En face projection optical coherence tomography (OCT) image at a depth of 200 μm; B: Cross-sectional OCT images of the long segment Barrett's esophagus (BE) along the probe pullback direction; C, D: Cross-sectional OCT images, corresponding to the green and blue dashed lines marked in (A). BE glands, the muscularis mucosa (MM), and the muscularis propria (MP) layers are clearly seen; D: Histology of an endoscopic mucosal resection specimen obtained from the same subject shows corresponding features observed in the OCT images. Scale bars: 1 mm.