Usefulness Of Narrow Band Imaging Research Articles

Clinical usefulness of narrow-band imaging for the endoscopic diagnosis of Inflammatory Bowel Disease

Clinical usefulness of narrow-band imaging for the endoscopic diagnosis of Inflammatory Bowel Disease

Clinical usefulness of narrow-band imaging for the endoscopic diagnosis of Inflammatory Bowel Disease

Clinical usefulness of narrow-band imaging for the endoscopic diagnosis of Inflammatory Bowel Disease

The Utility of Narrow Band Imaging in Improving the Endoscopic Diagnosis of Gastroesophageal Reflux Disease

Narrow band imaging (NBI) facilitates mucosal surface evaluation and may improve the endoscopic diagnosis of gastroesophageal reflux disease (GERD). We investigated the utility of NBI in improving the endoscopic diagnosis of GERD when compared with conventional endoscopy. A total of 107 subjects (nonerosive reflux disease [NERD], 36; erosive reflux disease [ERD], 41; controls, 30) were recruited prospectively. The mucosal morphology at the squamocolumnar junction (SCJ) in GERD and controls was visualized using conventional endoscopy and NBI. The main outcome measurements were as follows: (1) The differences in mucosal morphology at the SCJ between conventional endoscopy and NBI; and (2) the differences in mucosal morphology at the SCJ between GERD and controls with NBI. Micro-erosions, increased vascularity, and pit patterns at the SCJ not seen on conventional endoscopy were well seen with NBI. Compared with controls, ERD and NERD had a significantly higher prevalence of micro-erosions (ERD, 100%; NERD, 52.8%; controls, 23.3%), and increased vascularity (ERD, 95.1%; NERD, 91.7%; controls, 36.7%), but a lower prevalence of round pit pattern (ERD, 4.9%; NERD, 5.6%; controls, 70%). ERD and NERD were similar in terms of increased vascularity and pit patterns. Increased vascularity with absence of round pit pattern was useful to distinguish NERD from controls (sensitivity, 86.1%; specificity, 83.3%). Interobserver agreement was good for increased vascularity (kappa = 0.95) and micro-erosions (kappa = 0.89), but lower for pit pattern (kappa = 0.59). NBI enhanced mucosal morphology at the SCJ and appeared useful for improving the endoscopic diagnosis of GERD.

NEW APPLICATION OF NARROW BAND IMAGING FOR CHOLANGIOPANCREATOSCOPY

The usefulness of narrow band imaging (NBI), which is based on the principle that the depth of light penetration depends on its wavelength, has been accepted for evaluating malignant or benign lesions in the pharynx, the upper, and lower gastrointestine. The purpose of the present paper was to investigate NBI for diagnosing biliopancreatic disease. Using NBI it has become easy to detect the surface microstructure of biliary mucosa and subjacent vascular network of the bile duct, and inflammatory scarring stenosis is visualized as a whitish scar and multiple inflammatory red spots. However, bile duct cancer was detected as a stenosis with abnormal subjacent vessels and irregular surface. Concerning pancreatic duct, NBI has clearly shown vascular network and spreading of branch‐type intraductal papillary mucinous neoplasm to the main pancreatic duct. In contrast, bile juice has been detected as red fluid and bleeding as black red. Therefore, it is important to flush the biliary system before observing with NBI.

Night Vision Goggles for Surveillance of Barrett’s Esophagus: A Paradigm Shift is Coming!

Night Vision Goggles for Surveillance of Barrett’s Esophagus: A Paradigm Shift is Coming!

Usefulness of Narrow Band Imaging for the Diagnosis of Early Gastric Cancer: A Comparison Study with Conventional Endoscopy

Usefulness of Narrow Band Imaging for the Diagnosis of Early Gastric Cancer: A Comparison Study with Conventional Endoscopy Hirohisa Machida, Kazuhide Higuchi, Masahiko Tabuchi, Satoshi Sugimori, Natsuhiko Kameda, Tomoko Wada, Hirotoshi Okazaki, Masatsugu Shiba, Toshio Watanabe, Kazunari Tominaga, Yasuhiro Fujiwara, Tetsuo Arakawa Background and Study Aims: Importance of angiogenesis in the development of malignant disease is well recognized, and the morphologic changes in microvascular structure were useful in the diagnosis of early gastric cancer. The NBI system (NBI) is based on narrowing the bandwidth of spectral transmittance of optical filters, enables to clearly observe the surface and microvascular structure in the superficial lesion. The aim of this study is to evaluate the usefulness of NBI for the diagnosis of early gastric cancer. Patients and Methods: Twenty patients with 22 lesions underwent endoscopic examination for superficial gastric lesion. All lesions, which were confirmed as early gastric cancer, were investigated twice each by magnifying endoscopy with and without NBI, and recorded on digital video. Endoscopic evaluation focused on two findings which are specific for early gastric cancer, 1) irregular microvascular pattern (IMP), defined as irregularity of subepithelial microvascular structure, and 2) demarcation line (DL), defined as the border line between normal mucosa and cancerous lesion. Two endoscopists (one was well-experienced for NBI and magnifying endoscopy and another had no experience for both) assessed the digital video, and assigned to 3 grades for delineation of IMP and DL, visible or not for detectability of DL, according to the quality of visualization. These findings of NBI endoscopy were compared with those of conventional magnifying endoscopy. Results: For the IMP delineation, NBI endoscopy was superior to conventional endoscopy (p ! 0.0001). In NBI endoscopy, IMP was visualized clearly and differentiated easily from collecting venules of normal mucosa. The DL detectability was similar among NBI and conventional endoscopy (87.9% vs. 81.0%), but NBI endoscopy was superior to conventional endoscopy for the DL delineation (p ! 0.0001), resulting in the margin of the lesion being clear. With conventional endoscopy, well-experienced endoscopist was superior to not-experienced endoscopist in identifying the DL delineation, but it became to be similar with NBI endoscopy without significant difference. Conclusions: NBI endoscopy visualized the surface and microvascular structure evident, therefore it might be useful for the diagnosis of early gastric cancer, independent of experience. To estimate the usefulness using the NBI system for the diagnosis of early gastric cancer, randomized control trials should be conducted in the future.

The Utility of Narrow Band Imaging (NBI) Endoscopy in the Detection of Goblet Metaplasia in Patients with Gastroesophageal Reflux Disease (GERD)

The Utility of Narrow Band Imaging (NBI) Endoscopy in the Detection of Goblet Metaplasia in Patients with Gastroesophageal Reflux Disease (GERD)