Table 1

Virtual chromoendoscopy technologies

Narrow Band Imaging Olympus Medical Systems (Olympus, Japan)Optic filtering of reflected light from the mucosa, isolating blue (415 nm) and green (540 nm) bands of light to enhance visualisation.
i-Scan and i-Scan OE PENTAX (HOYA, Japan)Digital postprocessing image enhancement to improve mucosal pattern and vascularity. New OE technology combines this with optic filtering.
FICE (Fujinon, Japan)Postprocessing technology that reconstructs a virtual image of a single wavelength in real time.