Narrow band imaging: Application for early‐stage gastrointestinal neoplasia

Abstract

Narrow-band imaging (NBI) is an imaging technique for endoscopy using optical filters to narrow the bandwidth of spectral transmittance. Through this narrow spectrum, NBI contrasts surface structure and microvascular architecture of various lesions. In this article we focus on the application of NBI for early-stage neoplasia in the esophagus, stomach and colon with a three-step strategy of endoscopic diagnosis: (i) the detection of abnormality; (ii) the differentiation between non-neoplasia and neoplasia; and (iii) staging for tumor extension and depth of invasion.

Artificial Intelligence in Gastric Cancer: Identifying Gastric Cancer Using Endoscopic Images with Convolutional Neural Network

“…However, the CNN model, which used a conventional technique, white light endoscopy (WLE), had lower performance NBI, a novel imaging technique. A previous study mentioned that diagnosis accuracy of EGC when using WLE is low when it comes to flat lesions and minute carcinoma [ 49 ]; however, both superficial structures and microvascular architecture of lesions are visualized by NBI [ 50 , 51 ]. The performance of CNN was even lower when a mixture of WLI, ME-NBI, and chromoendoscopy had been used to train and test the model.…”

Endoscopic prediction of tumor margin and invasive depth in early gastric cancer

“…Narrow band imaging (NBI), a novel imaging technique based on the visualization of both the superficial structures and microvascular (MV) architecture of the lesions, has been applied to improve the diagnostic and delineative ability of EGC. In addition, a target biopsy may be carried out under NBI because of the clear minute changes of the lesion surface, which is also of value . According to the classification system based on MV and microsurface patterns (the VS classification), tumor margin lies between an area with irregular MV structure or an absent microsurface pattern and the surrounding regular mucosa (Fig.…”

“…In addition, a target biopsy may be carried out under NBI because of the clear minute changes of the lesion surface, which is also of value. 20 According to the classification system based on MV and microsurface patterns (the VS classification), 21 tumor margin lies between an area with irregular MV structure or an absent microsurface pattern and the surrounding regular mucosa ( Fig. 1).…”