The newly developed portable OCT equipment and flexible fiberoptic probe makes OCT a promising method for endoscopic "optical biopsy".

The high consistency of the first optical coherence tomography findings, the resolution of up to 10 microm, and the distinct pattern of normal, inflammatory, premalignant and malignant tissues make optical coherence tomography a promising method for endoscopically obtained optical biopsy.

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OCT of the biliary system is feasible in patients with biliary pathology. Interpretable images were obtained, and clinical use needs further assessment. As current OCT probes and processors do not yet provide optimal resolution, further generations of equipment with improved image quality are required.