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Narrow band imaging

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https://www.readbyqxmd.com/read/28226713/automatic-workflow-for-narrow-band-laryngeal-video-stitching
#1
Sara Moccia, Veronica Penza, Gabriele Omodeo Vanone, Elena De Momi, Leonardo S Mattos, Sara Moccia, Veronica Penza, Gabriele Omodeo Vanone, Elena De Momi, Leonardo S Mattos, Elena De Momi, Leonardo S Mattos, Gabriele Omodeo Vanone, Veronica Penza, Sara Moccia
In narrow band (NB) laryngeal endoscopy, the clinician usually positions the endoscope near the tissue for a correct inspection of possible vascular pattern alterations, indicative of laryngeal malignancies. The video is usually reviewed many times to refine the diagnosis, resulting in loss of time since the salient frames of the video are mixed with blurred, noisy, and redundant frames caused by the endoscope movements. The aim of this work is to provide to the clinician a unique larynx panorama, obtained through an automatic frame selection strategy to discard non-informative frames...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224618/the-feasibility-of-nbi-in-patients-with-suspected-upper-airway-lesions-a-multicenter-study
#2
Leif J J Bäck, Jami Rekola, Lassi Raittinen, Elina Halme, Petra Pietarinen, Harri Keski-Säntti, Leena-Maija Aaltonen, Antti A Mäkitie, Antti Raappana, Jukka Tikanto, Aleksi Schrey, Reidar Grenman, Jussi Laranne, Petri Koivunen, Heikki Irjala
OBJECTIVE: Narrow band imaging (NBI) improves diagnosis of laryngopharyngeal cancer, but most reported NBI studies are from experienced centers. Feasibility reports on use at everyday outpatient departments are needed. STUDY DESIGN: Researcher-initiated, prospective, multicenter. METHODS: Participating physicians were instructed in NBI technique during a 4-hour meeting. Patients underwent an examination that included endoscopy with white light (WL) high-definition (HD) TV and NBI filter in the selected time period...
February 22, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28221751/molecular-engineering-and-design-of-semiconducting-polymer-dots-with-narrow-band-near-infrared-emission-for-in-vivo-biological-imaging
#3
Chi-Shiang Ke, Chia-Chia Fang, Jia-Ying Yan, Po-Jung Tseng, Joseph R Pyle, Chuan-Pin Chen, Shu-Yi Lin, Jixin Chen, Xuanjun Zhang, Yang-Hsiang Chan
This article describes the design and synthesis of donor-bridge-acceptor based semiconducting polymer dots (Pdots) that exhibit narrow-band emissions, ultrahigh brightness, and large Stokes shifts in the near-infrared (NIR) region. We systematically investigated the effect of π-bridges on the fluorescence quantum yields of the donor-bridge-acceptor based Pdots. The Pdots could be excited by a 488-nm or 532-nm laser and have a high fluorescence quantum yield of 33% with a Stokes shift over 200 nm. The emission full width at half-maximum of the Pdots can be as narrow as 29 nm, about 2...
February 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28219184/-the-differential-diagnosis-of-narrow-band-imaging-for-the-polyp-lesion-on-the-vocal-cord
#4
W Feng, X G Ni
No abstract text is available yet for this article.
February 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28216508/-idiopathic-mesenteric-phlebosclerosis-one-case-report-and-literature-review
#5
Yonghong Jiang, Shan Huang, Kequan Chen, Xueqing Chen
Idiopathic mesenteric phlebosclerosis (IMP) is a rare disease and it is easy to be misdiagnosed, which is characterized by intestinal obstruction symptoms, such as abdominal pain, bloating and vomiting. In this study, a case of IMP was observed and the literatures were reviewed. Computed tomography shows funicular high-density shadow and vascular calcification shadow along the vessels around the bowels. Narrow band imaging (M-NBI) endoscopy revealed the disappeared honeycomb capillary, the disordered microvascular structure and the increased density of blood vessels...
January 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28215765/the-benefit-of-narrow-band-imaging-after-emr-of-laterally-spreading-lesions
#6
EDITORIAL
Jonathan Cohen
No abstract text is available yet for this article.
March 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28201841/evaluation-of-narrow-band-imaging-signs-in-eosinophilic-and-lymphocytic-esophagitis
#7
Tamaki Ichiya, Kyosuke Tanaka, Carlos A Rubio, Ulf Hammar, Peter T Schmidt
Background and study aims No specific endoscopic signs for diagnosing eosinophilic esophagitis (EoE) have been described and very few studies have reported endoscopic signs for lymphocytic esophagitis (LyE). This study aimed to assess the utility of narrow-band imaging magnifying endoscopy (NBI-ME) in predicting EoE/LyE diagnosis before histopathological assessment. Patients and methods Adult patients with dysphagia and/or food impaction who underwent esophagogastroduodenoscopy followed by NBI-ME and biopsies were included...
February 15, 2017: Endoscopy
https://www.readbyqxmd.com/read/28192481/a-meta-analysis-of-narrow-band-imaging-for-the-diagnosis-and-therapeutic-outcome-of-non-muscle-invasive-bladder-cancer
#8
YiQuan Xiong, JianDong Li, ShuJuan Ma, Jing Ge, LiZhi Zhou, Dongliang Li, Qing Chen
OBJECTIVES: To assess the additional detection rate (ADR) of within-patient comparisons of Narrow band imaging (NBI) and white light cystoscopy (WLC) for non-muscle invasive bladder cancer (NMIBC) detection and compare the impact of NBI and WLC on bladder cancer recurrence risk. METHODS: We searched relevant studies from PubMed, Embase, Medline, Web of Science and the Cochrane Library database for all articles in English published beforeJuly26th, 2016. Pooled ADR, diagnostic accuracy, relative risk (RR) and their 95% confidence intervals (CIs) were calculated...
2017: PloS One
https://www.readbyqxmd.com/read/28181962/use-of-narrow-band-imaging-in-the-diagnosis-of-hypovascular-endobronchial-sarcoidosis
#9
Rimoun Hakim, Bruce Sabath, Tugba Kaplan, Rex Yung
Narrow band imaging (NBI) has been widely applied for the evaluation of numerous disease conditions that present with increased vascularity of the mucosa, most often malignancies. It is increasingly being used in benign conditions as well. We present the first case in which NBI was used, rather, to detect areas of bronchial hypovascularity due to its ability to increase the visual contrast between normal and hypovascular mucosa. Endobronchial biopsy of these nodules led to the diagnosis of sarcoidosis. Had conventional white light alone been utilized, the diagnosis would likely have been missed because not only were these lesions difficult to visualize under white light but transbronchial lung biopsy and transbronchial needle aspiration were unremarkable...
February 8, 2017: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/28176895/advanced-endoscopic-imaging-in-gastric-neoplasia-and-preneoplasia
#10
Jonathan W J Lee, Lee Guan Lim, Khay Guan Yeoh
Conventional white light endoscopy remains the current standard in routine clinical practice for early detection of gastric cancer. However, it may not accurately diagnose preneoplastic gastric lesions. The technological advancements in the field of endoscopic imaging for gastric lesions are fast growing. This article reviews currently available advanced endoscopic imaging modalities, in particular chromoendoscopy, narrow band imaging and confocal laser endomicroscopy, and their corresponding evidence shown to improve diagnosis of preneoplastic gastric lesions...
2017: BMJ Open Gastroenterology
https://www.readbyqxmd.com/read/28172835/p624-chromoendoscopy-and-narrow-band-imaging-versus-conventional-white-light-endoscopy-for-detection-of-neoplasia-in-ulcerative-colitis-a%C3%A2-systematic-review-and-meta-analysis
#11
O Har-Noy, L Katz, T Avni, T Bessissow, D Young, A Koulaouzidis, T Engel, R Eliakim, S Ben-Horin, U Kopylov
No abstract text is available yet for this article.
February 1, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28168890/diagnostic-performance-of-narrow-band-imaging-for-laryngeal-cancer
#12
Changling Sun, Xue Han, Xiaoying Li, Yayun Zhang, Xiaodong Du
Objective To evaluate the performance of narrow band imaging (NBI) for the diagnosis of laryngeal cancer and to compare the diagnostic value of NBI with that of white light endoscopy. Data Sources PubMed, Embase, Cochrane Library, and CNKI databases. Review Methods Data analyses were performed with Meta-DiSc. The updated Quality Assessment of Diagnostic Accuracy Studies-2 tool was used to assess study quality and potential bias. Publication bias was assessed with the Deeks's asymmetry test. The protocol used in this article has been published on PROSPERO and is in accordance with the PRISMA checklist...
February 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28157982/stepwise-method-based-on-wiener-estimation-for-spectral-reconstruction-in-spectroscopic-raman-imaging
#13
Shuo Chen, Gang Wang, Xiaoyu Cui, Quan Liu
Raman spectroscopy has demonstrated great potential in biomedical applications. However, spectroscopic Raman imaging is limited in the investigation of fast changing phenomena because of slow data acquisition. Our previous studies have indicated that spectroscopic Raman imaging can be significantly sped up using the approach of narrow-band imaging followed by spectral reconstruction. A multi-channel system was built to demonstrate the feasibility of fast wide-field spectroscopic Raman imaging using the approach of simultaneous narrow-band image acquisition followed by spectral reconstruction based on Wiener estimation in phantoms...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28135297/acetic-acid-enhanced-narrow-band-imaging-for-the-diagnosis-of-gastric-intestinal-metaplasia
#14
Jie Sha, Pin Wang, Bingliang Zhu, Minghui Zhu, Xueliang Li, Feng Gao
Gastric intestinal metaplasia (GIM) is a precancerous lesion of the stomach. The detection of GIM using conventional white-light endoscopy (WLE) is difficult. In this study, we determined whether acetic acid-enhanced narrow band imaging (AA-NBI) improves the detection of GIM. A consecutive cohort of 132 individuals aged 40 years or older was subjected to upper gastrointestinal endoscopy using WLE, NBI and AA-NBI. The ability of the three methods to diagnose GIM in patients was compared. Histological assessment (per-patient and per-biopsy) was used for the accuracy assessment...
2017: PloS One
https://www.readbyqxmd.com/read/28128351/effect-of-the-kf-post-deposition-treatment-on-grain-boundary-properties-in-cu-in-ga-se2-thin-films
#15
N Nicoara, Th Lepetit, L Arzel, S Harel, N Barreau, S Sadewasser
Significant power conversion efficiency improvements have recently been achieved for thin-film solar cells based on a variety of polycrystalline absorbers, including perovskites, CdTe, and Cu(In,Ga)Se2 (CIGS). The passivation of grain boundaries (GBs) through (post-deposition) treatments is a crucial step for this success. For the case of CIGS, the introduction of a potassium fluoride post-deposition treatment (KF-PDT) has boosted their power conversion efficiency to the best performance of all polycrystalline solar cells...
January 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28123467/correlation-between-microvascular-characteristics-and-the-expression-of-mvd-igf-1-and-stat3-in-the-development-of-colonic-polyps-carcinogenesis
#16
Hong Liu, Jing Wu, Xiang-Chun Liu, Nan Wei, Kui-Liang Liu, Yan-Hui Ma, Hong Chang, Quan Zhou
The aim of the present study was to investigate the correlation between vascular characteristics under narrow band imaging (NBI) and the expression of angiogenic factors of colorectal carcinoma and adenoma, and to evaluate the feasibility of NBI in vivo visualizing angiogenesis. Patients with colorectal polyps, which were pathologically confirmed as early carcinoma and adenoma, were recruited and examined by NBI. The vascular pattern was classified into type I (invisible or faintly visible vasculature), type II (clearly visible microvasculature that is regularly arranged in a round, oval honeycomb-like pattern) and type III (clearly visible microvasculature that is irregularly arranged in size and caliber or has irregular winding)...
January 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28113800/computer-aided-classification-of-gastrointestinal-lesions-in-regular-colonoscopy
#17
Pablo Mesejo, Daniel Pizarro, Armand Abergel, Olivier Rouquette, Sylvain Beorchia, Laurent Poincloux, Adrien Bartoli
We have developed a technique to study how good computers can be at diagnosing gastrointestinal lesions from regular (white light and narrow banded) colonoscopic videos compared to two levels of clinical knowledge (expert and beginner). Our technique includes a novel tissue classification approach which may save clinician's time by avoiding chromoendoscopy, a time-consuming staining procedure using indigo carmine. Our technique also discriminates the severity of individual lesions in patients with many polyps, so that the gastroenterologist can directly focus on those requiring polypectomy...
March 29, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28104480/the-effect-of-spatial-resolution-and-filtering-on-mapping-cardiac-fibrillation
#18
Benjamin King, Andreu Porta-Sánchez, Stéphane Massé, Nima Zamiri, Krishanand Balasundaram, Marjan Kusha, Nicholas Jackson, Shouvik Haldar, Karthikeyan Umapathy, Kumaraswamy Nanthakumar
BACKGROUND: Endocardial mapping tools use variable inter-electrode resolution whilst body surface mapping tools use narrow band pass filtering (BPF) to map fibrillatory mechanisms established by high resolution optical imaging. OBJECTIVES: To study the effect of resolution and BPF on the underlying mechanism being mapped. METHODS: Hearts from 14 healthy New Zealand white rabbits were Langendorff perfused. We studied the effect of spatial resolution and BPF on the location and characterization of rotors, by comparing phase singularities (PS) detected by high resolution un-filtered optical maps (OM), of fibrillating myocardium with decimated and filtered maps with simulated electrode spacing of 2, 5 and 8mm...
January 16, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28104024/-the-differential-diagnosis-of-narrow-band-imaging-for-the-leukoplakia-lesion-on-the-vocal-cord
#19
X G Ni
No abstract text is available yet for this article.
January 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28086818/narrow-band-imaging-versus-lugol-chromoendoscopy-to-diagnose-squamous-cell-carcinoma-of-the-esophagus-a-systematic-review-and-meta-analysis
#20
Flavio Hiroshi Ananias Morita, Wanderley Marques Bernardo, Edson Ide, Rodrigo Silva Paula Rocha, Julio Cesar Martins Aquino, Mauricio Kazuyoshi Minata, Kendi Yamazaki, Sergio Barbosa Marques, Paulo Sakai, Eduardo Guimarães Hourneaux de Moura
BACKGROUND: In the early stage esophageal cancer, changes in the mucosa are subtle and pass unnoticed in endoscopic examinations using white light. To increase sensitivity, chromoscopy with Lugol's solution has been used. Technological advancements have led to the emergence of virtual methods of endoscopic chromoscopy, including narrow band imaging (NBI). NBI enhances the relief of the mucosa and the underlying vascular pattern, providing greater convenience without the risks inherent to the use of vital dye...
January 13, 2017: BMC Cancer
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