窄带成像技术将结肠镜常规发射的白光改变为蓝光，以此提供一个较窄的波长，加强结肠表面结构的视觉对比度。

NBI changes the white light normally emitted by the colonoscope to a bluish light, providing a narrower wavelength and enhancing visual contrast of the surface structure of the colon.

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经过试验证明，该技术是一种最佳的窄带噪声调制技术，并且可以方便地实现工程化。

The experimental results prove that this technique is one of the best modulation techniques of narrow noise, and that this technique may be conveniently applied to engineering.

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这种对消技术对于窄带正弦干扰也是适用的。

This cancelling technique is suitable for the narrow band sinusoidal interference.

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