The purpose of introducing optical electronics into video endoscopes is to improve
the accuracy of diagnosis through image processing and digital technology. Narrow-band
imaging (NBI), one of the most recent techniques, involves the use of interference
filters to illuminate the target in narrowed red, green and blue (R/G/B) bands of
the spectrum. This results in different images at distinct levels of the mucosa and
increases the contrast between the epithelial surface and the subjacent vascular network.
NBI can be combined with magnifying endoscopy with an optical zoom. The aim of this
new technique is to characterize the surface of the distinct types of gastrointestinal
epithelia - e. g., intestinal metaplasia in Barrett’s esophagus. The technique may
also make it possible to demonstrate disorganization of the vascular pattern in inflammatory
disorders of the gastrointestinal mucosa and in superficial neoplastic lesions in
the esophagus, stomach, and large bowel.
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J.-F. Rey, M.D.
Institut Arnault Tzanck
Avenue du Dr Maurice Donat · 06700 St Laurent du Var · France·
Fax: +33-4-93 07 51 58
Email: jean-francois.rey@wanadoo.fr