Appearance of enhanced tissue features in narrow-band endoscopic imaging

Gono, Kazuhiro; Obi, Takashi; Yamaguchi, Masahiro; Ohyama, Nagaaki; Machida, Hirohisa; Sano, Yasushi; Yoshida, Shigeaki; Hamamoto, Yasuo; Endo, Takao

doi:10.1117/1.1695563

Cited by 830 publications

(578 citation statements)

References 19 publications

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“…In contrast, WLI has poor performance, low sensitivity, and low specificity. By means of ME-NBI examination, one is immediately able to observe suspicious lesions in higher magnification, and can clearly see the micromorphology and the microvascular structure of mucosal lesions to identify cancerous lesions [24,25]. Currently, the ''VS classification'' criteria of Yao et al [26,27], which suggest the presence of a lesion with the boundary, an abnormal vascular network on its surface, or an abnormal change on the surface of the microstructure, are widely used as the diagnostic criteria for ME-NBI diagnosis of gastric cancer.…”

Section: Discussionmentioning

confidence: 99%

“…However, the performance of ME-NBI is also affected by the blood and bile in the stomach. Since the working principle of narrow band imaging is based on the strong absorption of narrow band light by hemoglobin and the high reflection of mucosal surfaces, blood and bile on the surface of lesions may result in failure of ME-NBI observation [24,30].…”

Section: Discussionmentioning

confidence: 99%

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Comparison of the diagnostic efficacy of white light endoscopy and magnifying endoscopy with narrow band imaging for early gastric cancer: a meta-analysis

et al. 2015

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Objective Magnifying endoscopy with narrow band imaging (ME-NBI) is widely used in gastroscopy, especially in the diagnosis of early gastric cancer. The purpose of this meta-analysis is to compare the diagnostic efficacy of white light imaging (WLI) and that of ME-NBI for early gastric cancer. Methods PubMed/MEDLINE, EMBASE, and the Cochrane Library were searched to identify studies which met the inclusion criteria. A random-effects model was used to calculate overall sensitivity, specificity, and the area under the receiver operating characteristic curve (AUC) to assess the diagnostic efficacy of WLI and ME-NBI in early gastric cancer. Sensitivity analysis was performed to assess the stability of the results. Results Ten studies met the inclusion criteria, and included 1724 patients and 2153 lesions. The pooled sensitivity, specificity, and AUC for the diagnosis of early gastric cancer using WLI were 0.48 [95 % confidence interval (CI) 0.39-0.57; I 2 = 78.6 %], 0.67 (95 % CI 0.62-0.71; I 2 = 81.9 %), and 0.62, respectively. The pooled sensitivity, specificity, and AUC using ME-NBI were 0.83 (95 % CI 0.79-0.87; I 2 = 79.8 %), 0.96 (95 % CI 0.95-0.97; I 2 = 89.3 %), and 0.96, respectively. The studies showed a high degree of heterogeneity. Further sensitivity analysis was mainly performed for the studies of small lesions (mean size 10 mm or less) and the studies with a the score of 12 points or greater in the literature quality assessment, and the AUCs for ME-NBI for diagnosis of early gastric cancer were between 0.93 and 0.98, which suggested that the diagnostic value was still high and stable. Conclusion Compared with WLI, ME-NBI can effectively diagnose early gastric cancer.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Comparison of the diagnostic efficacy of white light endoscopy and magnifying endoscopy with narrow band imaging for early gastric cancer: a meta-analysis

et al. 2015

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“…12). 36 Combining the NBI and magnifying endoscopy (M-NBI) visualized contrasted micromucosal structures and microvascular architecture of the superficial mucosa. 37 Tahara et al 38 classified M-NBI images of the gastric mucosa into four groups and showed that sensitivity and specificity of the type 3 pattern for IM were 73.3% and 95.6%, respectively (Fig.…”

Section: Atrophic Gastritis In Magnifying Chromoendoscopy and Narrowmentioning

confidence: 99%

What Have We Accomplished in Endoscopic Image Analysis for Atrophic Gastritis?

Kim

Uedo

2013

Korean J Helicobacter Up Gastrointest Res

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Identifying precancerous conditions such as atrophic gastritis and intestinal metaplasia (IM) has a crucial role in detecting high risk patients for gastric cancer. White light imaging (WLI) is a basic tool for diagnosing these premalignant conditions, however its low accuracy and high variability has been a serious problem in diagnosing these premalignant conditions. Several noble imaging technologies, such as magnifying endoscopy, narrow band imaging, autofluorescence imaging, and confocal laser endomicroscopy, provids us with chances of overcoming the limitations of conventional WLI. Autofluorescence images help us understand the extent of atrophic gastritis with vivid colors. Magnifying endoscopy with narrow band imaging shows microsurface structure and micrvascular architecture and is able to identify the degree of intestinal metaplasia by the presence of "light blue crest" sign. Confocal laser endomicroscopy produces reliable images of goblet cells that can replace biopsy. Usefulness of the new endoscopic imaging techniques for predicting gastric cancer development needs to be validated in clinical practice. Currently, it would be practical to apply magnifying endoscopy with narrow band imaging sequentially after white light endoscopy for identifying the presence of IM and atrophic gastritis. (Korean J Helicobacter Up Gastrointest Res 2013;13:6-19)

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“…Studies of combinations of different wavelengths showed that a combination of 415 and 540 nm provided the highest visibility. Therefore, the current NBI system uses these two wavelengths (7).…”

Section: Technical Background Of Narrow Band Imagingmentioning

confidence: 99%

Narrow band imaging in gynecology: A new diagnostic approach with improved visual identification (Review)

Kisu

Banno

Tsuji³

et al. 2011

Int J Oncol

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Abstract. Narrow band imaging (NBI) is a new endoscopic technique in which images of mucosal microstructures and capillary structures are enhanced by shifting the light spectrum to a narrow band. Image-enhanced gastrointestinal endoscopy using NBI has improved the qualitative diagnosis of the grade and depth of invasion of an atypical lesion. NBI is currently not commonly used in gynecological endoscopy, but has recently been applied in laparoscopy and hysteroscopy. The utility of NBI for diagnosis of endometrial lesions and endometriosis has also been shown. In gynecological endoscopy, NBI provides enhanced images of mucosal microstructures and capillary structures and improves visual identification of lesions. Therefore, image-enhanced observation using NBI is likely to be useful for improved detection of lesions in endoscopic diagnosis. However, this technique remains experimental so far, and no study has demonstrated improved clinical outcome using this technique. In this review, we discuss the utility and potential applications of NBI in clinical practice in gynecology.

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Appearance of enhanced tissue features in narrow-band endoscopic imaging

Cited by 830 publications

References 19 publications

Comparison of the diagnostic efficacy of white light endoscopy and magnifying endoscopy with narrow band imaging for early gastric cancer: a meta-analysis

Comparison of the diagnostic efficacy of white light endoscopy and magnifying endoscopy with narrow band imaging for early gastric cancer: a meta-analysis

What Have We Accomplished in Endoscopic Image Analysis for Atrophic Gastritis?

Narrow band imaging in gynecology: A new diagnostic approach with improved visual identification (Review)

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