Narrow Band Imaging (NBI)

  • Through the application of spectral properties, it can strengthen the mucosal surface of the vascular structure and type
  •  The lens of the original, accept the visible light source in the gastrointestinal mucosa of the reflex, through the three primary colors (red, green, blue) digital signal in the computer reorganization imaging

Spectral Characteristics:

  • The longer the wavelength, the better penetration
     red light> green light> blue light
  • Blood red blood cells in the blood vessels also absorb blue light to reflect redness
  • Narrow-band endoscopic spectral wavelengths are narrowed, and their wavelengths are concentrated at 415nm and 540nm, which is more suitable for vascular absorption, so it can highlight the vascular structure.


  • Use a specific light source filter plate to allow only a certain wavelength of light to penetrate
    Blue (415nm) can show mucosal red microvessels
    Green (540nm) can show deeper submucosal vessels
  • The use of lesions will produce newborn small blood vessels of the characteristics of mucosal lesions can make parts and normal tissue easier to distinguish between the discovery and differential diagnosis of the purpose