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Narrow band imaging

Tony Ma, Lenore Ellett, Kate McIlwaine, Janine Manwaring, Alex Eskander, Prathima Chowdary, Emma Readman, Peter Maher
STUDY OBJECTIVE: To assess the utility of narrow band imaging (NBI) to detect additional areas of endometriosis not identified by standard white light in patients undergoing laparoscopy for investigation of pelvic pain. DESIGN: Prospective cohort trial DESIGN CLASSIFICATION: Level II: Evidence obtained from well-designed cohort study. SETTING: Tertiary laparoscopic sub-specialty unit in Melbourne, Australia. PATIENTS: Fifty-seven patients undergoing laparoscopy for investigation of pelvic pain were recruited...
May 15, 2018: Journal of Minimally Invasive Gynecology
J H Wu, X Y Luo
Objective: To explore the role of narrow band imaging (NBI) endoscopy in the diagnosis of oropharyngeal and laryngopharyngeal lesions. Method: NBI and white light (WLI) endoscopy were performed on 90 patients with oropharyngeal and laryngopharyngeal lesions from August 2016 to May 2017. NBI findings were classified into 5 types according to the Ni classification and were compared with histopathological results. Accuracy of NBI on premalignant and malignant lesions were compared with WLI. The connection between NBI findings and phathological results were explored...
May 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
Anna Rzepakowska, Ewelina Sielska-Badurek, Michal Żurek, Ewa Osuch-Wójcikiewicz, Kazimierz Niemczyk
BACKGROUND: This study investigates relevance of narrow band imaging (NBI) in stratifying risk of malignant transformation within leukoplakia. METHODS: We conducted a prospective analysis that included 62 patients with 91 changes of leukoplakia on vocal folds. The NBI was obtained before microsurgery. Categorization of the lesion as benign was made when vessels of surrounding epithelium were classified as type I, II, or IV according to Ni classification. If there were visualized intraepithelial papillary capillary loops of type V, the lesion was classified as malignant...
May 13, 2018: Head & Neck
Matthew B Sturm, Thomas D Wang
No abstract text is available yet for this article.
May 11, 2018: American Journal of Gastroenterology
J J Tian, W Xu, Z H Lyu, J K Ma, P Cui, N Sa, H Y Cao
Objective: To evaluate the usefullness of flexible esophagoscopy and chromoendoscopy with Lugol's solution in the detection of synchronous esophageal neoplasm in patients with hypopharyngeal squamous cell carcinoma (HSCC). Methods: A retrospective review of 96 cases with HSCC that received surgical treatment from March 2016 to March 2017 was accomplished. In these patients, the site of origin were pyriform sinus ( n =75), posterior pharyngeal wall ( n =11) and postcricoid ( n =10). Esophagoscopy was prospectively performed on all patients before treatment for HSCC...
April 7, 2018: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
Ben Tremain, Ian R Hooper, J Roy Sambles, Alastair P Hibbins
A planar metallic metasurface formed of spiral elements is shown to support an isotropic backward wave over a narrow band of microwave frequencies. The magnetic field of this left-handed mode is mapped experimentally using a near-field scanning technique, allowing the anti-parallel group and phase velocities to be directly visualised. The corresponding dispersion relation and isofrequency contours are obtained through Fourier transformation of the field images.
May 8, 2018: Scientific Reports
Andrej Wagner, Daniel Neureiter, Josef Holzinger, Tobias Kiesslich, Eckhard Klieser, Frieder Berr
Anal intraepithelial neoplasia (AIN) is a precursor of anal carcinoma. Conventional therapy is based on topical and local ablative approaches. However, the recurrence rates are very high, leading to repetitive treatment sessions and need for long-term surveillance. Endoscopic submucosal dissection (ESD) is an established treatment for malignant early neoplasias of the gastrointestinal tract, especially in the esophagus, stomach, and colorectum. Japanese centers have reported few cases of ESD for early anal carcinoma...
May 2018: Zeitschrift Für Gastroenterologie
Yuxiu Zou, Siqi Huang, Yixin Liao, Xupeng Zhu, Yiqin Chen, Long Chen, Fang Liu, Xiaoxiao Hu, Haijun Tu, Liang Zhang, Zhangkun Liu, Zhuo Chen, Weihong Tan
For cancer diagnosis, technologies must be capable of molecular recognition, and they must possess a built-in pattern recognition component for efficient imaging and discrimination of targeted cancer cells. Surface enhanced Raman scattering (SERS) tags based on plasmonically active nanoparticles hold promise for accurate and efficient cancer cell recognition, owing to ultra-narrow peak and sensitive optical properties. However, a complex fingerprint spectrum increases data analysis difficulty, making it necessary to develop multicolor SERS tags with a simple fingerprint spectrum...
March 14, 2018: Chemical Science
Keiichiro Nakajo, Yasuhiro Oono, Takeshi Kuwata
An 80-year-old woman found to have a gastric tumor by endoscopy was referred to our hospital for further examination and treatment. Helicobacter pylori eradication therapy was successfully performed 10 years ago. Conventional endoscopy revealed a 20-mm flat elevated lesion in the greater curvature of the middle gastric body. (Fig. 1a). Magnifying endoscopy with narrow band imaging (M-NBI) revealed an irregular microvascular architecture, including closed-loop vessels with repeated irregular anastomoses (Fig...
May 5, 2018: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
Yijiang Shen
Source and mask optimization (SMO) remains a key technique to improve the wafer image printability for technology nodes of 22 nm and beyond, enabling the continuation of the immersion lithography. In this paper, we propose a distance level-set regularized reformulation of the SMO maintaining the desired signed distance property, which secures stable curve evolution and accurate computation with a simpler and more efficient numerical implementation. Consequently, computation load caused by convolution operations and memory requirements of the electric-field caching technique (EFCT) is significantly eased by performing computation only in the narrow band; moreover, the convergence of the updating process is further improved by applying larger Euler time steps of the Courant-Friedrichs-Lewy (CFL) condition with reduced optimization dimensionality...
April 16, 2018: Optics Express
L Staníková, R Walderová, D Jančatová, M Formánek, K Zeleník, Pavel Komínek
OBJECTIVE: The aim of this study was to compare narrow band imaging (NBI) endoscopy and Storz Professional Image Enhancement System (SPIES) in observing epithelial and/or subepithelial microvascular irregularities and pathologies. METHODS: A total of 73 patients with laryngeal or hypopharyngeal lesions were investigated using high-definition NBI endoscopy preoperatively in local anesthesia and using SPIES system intraoperatively in general anesthesia from August 2016 to October 2017...
April 30, 2018: European Archives of Oto-rhino-laryngology
Seiko Sasanuma, Kazuo Ohtsuka, Shin-Ei Kudo, Noriyuki Ogata, Yasuharu Maeda, Masashi Misawa, Yuichi Mori, Toyoki Kudo, Tomokauzu Hisayuki, Kunihiko Wakamura, Takemasa Hayashi, Atsushi Katagiri, Hideyuki Miyachi, Toshiyuki Baba, Fumio Ishida
Background and study aims:  Mucosal healing is a current treatment target in ulcerative colitis (UC), while histological remission is another target. The aim of this study was to evaluate the efficiency of magnified narrow band imaging (NBI) findings of mucosal healing and their relationship with histological activity and prognosis. Patients and methods:  Patients with UC who underwent total colonoscopy between January 2010 and December 2012 with left-sided or total-colitis type UC and achieved clinical remission with an endoscopic Mayo score of 0 or 1 were included...
May 2018: Endoscopy International Open
Celso M Isidro, Neil McIntyre, Alex M Lechner, Ian Callow
The management of suspended solids and associated contaminants in rivers requires knowledge of sediment sources. In-situ sampling can only describe the integrated impact of the upstream sources. Empirical models that use surface reflectance from satellite images to estimate total suspended solid (TSS) concentrations can be used to supplement measurements and provide spatially continuous maps. However, there are few examples, especially in narrow, shallow and hydrologically dynamic rivers found in mountainous areas...
April 16, 2018: Science of the Total Environment
Yuichi Fukami, Shin-Ei Kudo, Hideyuki Miyachi, Masashi Misawa, Kunihiko Wakamura, Kenichi Suzuki, Kenta Igarashi, Akihiro Yamauchi, Yuichi Mori, Toyoki Kudo, Takemasa Hayashi, Atsushi Katagiri, Shigeharu Hamatani, Tamotsu Sugai
A 60-year-old woman underwent colonoscopy, which revealed a red, 5-mm protruded lesion in the sigmoid colon, surrounded by white spots in white-light imaging. Indigo carmine spray indicated endoscopic morphological type Is + IIc. The vessel pattern was diagnosed as JNET-type 2B in magnifying narrow-band imaging, and magnified crystal violet-stained images revealed a VI low-grade pit pattern. We endoscopically diagnosed this lesion as an intramucosal or slightly invasive submucosal carcinoma with low confidence, and performed endoscopic mucosal resection to obtain a total biopsy...
April 28, 2018: Clinical Journal of Gastroenterology
Seiichiro Abe, Yutaka Saito, Yasuhiro Oono, Yusaku Tanaka, Taku Sakamoto, Masayoshi Yamada, Takeshi Nakajima, Takahisa Matsuda, Hiroaki Ikematsu, Tomonori Yano, Shigeki Sekine, Motohiro Kojima, Hidetsugu Yamagishi, Hiroyuki Kato
BACKGROUND: The aim of this pilot study is to investigate the diagnostic yield of probe-based confocal laser endomicroscopy (pCLE) in the evaluation of depth of invasion in colorectal lesions. METHODS: Patients with colorectal lesions eligible for either endoscopic treatment or surgery were enrolled in the study. Tumor's depth of invasion was classified as mucosal or slight submucosal (M-SM1) and deep submucosal invasion or deeper (SM2 or deeper). White light endoscopy (WLE), magnifying narrow band imaging (M-NBI), and magnifying chromoendoscopy (M-CE) were used to assess colorectal lesions, and pCLE was used to identify tumor's features related to SM2 or deeper...
April 26, 2018: International Journal of Colorectal Disease
Shixin Huang, Mohamadamin Makarem, Sarah Nelson Kiemle, Hossein Hamedi, Moujhuri Sau, Daniel J Cosgrove, Seong H Kim
Sum frequency generation (SFG) vibrational spectroscopy can selectively detect and analyze noncentrosymmetric components interspersed in amorphous matrices; this principle has been used for studies of nano-scale structure and meso-scale assembly of cellulose in plant cell walls. However, the spectral information averaged over a large area or volume cannot provide regio-specific or tissue-specific information of different cells in plants. This study demonstrates spatially-resolved SFG analysis and imaging by combining a broadband SFG spectroscopy system with an optical microscope...
April 26, 2018: Journal of Physical Chemistry. B
Zhenluan Xue, Songjun Zeng, Jianhua Hao
Optical bioimaging by using the new short-wavelength infrared window (SWIR, also named as NIR-II, 1000-1700 nm) is emerged as a next generation imaging technique for disease diagnosis owing to the unprecedented improvements in imaging sensitivity and spatial resolution. However, it is challenging to search new imaging agents with highly biocompatible and bright narrow-band emission located in the 1500-1700 nm (referred as NIR-IIb) region. Here we developed high quality polyacrylic acid (PAA) modified NaYF4 :Gd/Yb/Er nanorods (PAA-NRs) with remarkably enhanced NIR-IIb emission and decent bio-compatibility for in vivo cerebral vascular bioimaging and small tumor visualization...
April 17, 2018: Biomaterials
Wenxiu Diao, Xu Huang, Lei Shen, Zhi Zeng
BACKGROUND: Blue laser imaging (BLI) is a new image-enhanced endoscopy technique that utilizes a laser light source developed for narrow-band light observation. AIMS: To evaluate the value of BLI combined with magnifying endoscopy (M-BLI) for the diagnosis of early esophageal cancers (EECs). METHODS: This single-center prospective study analyzed 149 patients with focal esophageal lesions detected with white light endoscopy (WLE) at Renmin Hospital of Wuhan University between April 2015 and June 2017...
March 30, 2018: Digestive and Liver Disease
Gertrúd Tamás, Venkata C Chirumamilla, Abdul R Anwar, Jan Raethjen, Günther Deuschl, Sergiu Groppa, Muthuraman Muthuraman
Background: Gamma synchronization (GS) may promote the processing between functionally related cortico-subcortical neural populations. Our aim was to identify the sources of GS and to analyze the direction of information flow in cerebral networks at the beginning of phasic movements, and during medium-strength isometric contraction of the hand. Methods: We measured 64-channel electroencephalography in 11 healthy volunteers (age: 25 ± 8 years; four females); surface electromyography detected the movements of the dominant hand...
2018: Frontiers in Human Neuroscience
Hiroyuki Aihara, Nitin Kumar, Christopher C Thompson
BACKGROUND: An education system for narrow band imaging (NBI) interpretation requires sufficient exposure to key features. However, access to didactic lectures by experienced teachers is limited in the United States. AIM: To develop and assess the effectiveness of a colorectal lesion identification tutorial. METHODS: In the image analysis pretest, subjects including 9 experts and 8 trainees interpreted 50 white light (WL) and 50 NBI images of colorectal lesions...
April 19, 2018: Digestion
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