The Japan Narrow-Band Imaging Expert Team (JNET) Classification for the Characterization of Colorectal Lesion Using Magnifying Endoscopy

Narrow-band imaging (NBI) was initially developed by Yasushi Sano, Manabu Muto, and Hirokazu Gono et al., under the supervision of Dr. Shigeaki Yoshida at the National Cancer Center Hospital East in 1999 [1, 2]. A prototype short-wavelength narrow-band RGB filter was successfully created in 2001 (monochrome NBI) [1, 2], and the microvascular architecture of the gastrointestinal tract and tumor surface structure were successfully visualized in color using 415 and 540 nm short- and medium-wavelength filters in 2003 [3].