Clin Endosc.  2015 Nov;48(6):498-502. 10.5946/ce.2015.48.6.498.

Advanced Imaging Technology in Biliary Tract Diseases:Narrow-Band Imaging of the Bile Duct

  • 1Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University School of Medicine, Bucheon, Korea.


Newly introduced direct peroral cholangioscopy and the development of video choledochoscopes have enabled more defined observation of bile duct mucosal lesions with clearer images. Narrow-band imaging (NBI) is a unique endoscopic imaging technology that provides enhanced endoscopic images of surface mucosal structures and its superficial microvessels. Advanced cholangioscopy and NBI are expected to be useful for precise evaluation and correct diagnosis of biliary tract diseases. However, the diagnostic value of advanced bile duct imaging with cholangioscopy requires further evaluation.


Cholangioscopy; Peroral cholangioscopy; Narrow-band imaging; Image-enhanced endoscopy

MeSH Terms

Bile Ducts*
Biliary Tract Diseases
Biliary Tract*


  • Fig. 1. Cholangioscopic view of a normal bile duct. (A) White light image. (B) Narrow-band imaging (NBI). Note how fine reticular superficial microvessels become more prominent with NBI.

  • Fig. 2. Cholangioscopic view of benign bile duct lesions with white light images and narrow-band imaging, respectively. (A, B) Inflammatory polyp. (C, D) Scar change. (E, F) Inflammatory lesions.

  • Fig. 3. Cholangioscopic view of malignant biliary structure. (A) White light image. (B) Narrow-band imaging (NBI). Note the thick “tumor vessels” enhanced by NBI.


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