Barrett's esophagus (optical coherence tomography)

(A) Endoscopic view with optical coherence tomography (OCT) catheter probe placed adjacent to segment of Barrett's mucosa; (B) OCT image demonstrating multiple crypt- and band-like structures; (C) highly-magnified view of the portion of the OCT image outlined in the box in (B); (C) corresponding histological section of Barrett's mucosa.