| [ Summary ] |
NBI (narrow band imaging) technology may be used as an optical image enhancer by changing the spectrum of the illumination of the video endoscope from that of conventional white illumination. By utilizing NBI, the contrast of the capillary patterns in the superficial layer is markedly improved. In this report, the basis of imaging systems for NBI is described. The interactions between tissues and light, such as absorption and scattering are also explained in terms of basic knowledge related to understanding NBI. The system configuration of the NBI prototype is described, along with optical filter design and image processing methodology. |