Review
Copyright ©2008 The WJG Press and Baishideng.
World J Gastroenterol. Aug 21, 2008; 14(31): 4867-4872
Published online Aug 21, 2008. doi: 10.3748/wjg.14.4867
Figure 1
Figure 1 NBI system. Different from the conventional RGB filter, the NBI filter consists of two narrow bands (415 ± 30 nm and 540 ± 30 nm, respectively) that make it possible to observe clearly superficial vascular patterns for clinical evaluation.