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Narrow band imaging

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https://www.readbyqxmd.com/read/28526945/tri-scan-a-three-stage-color-enhancement-tool-for-endoscopic-images
#1
Mohammad S Imtiaz, Shahed K Mohammed, Farah Deeba, Khan A Wahid
Modern endoscopes play a significant role in diagnosing various gastrointestinal (GI) tract related diseases where the visual quality of endoscopic images helps improving the diagnosis. This article presents an image enhancement method for color endoscopic images that consists of three stages, and hence termed as "Tri-scan" enhancement: (1) tissue and surface enhancement: a modified linear unsharp masking is used to sharpen the surface and edges of tissue and vascular characteristics; (2) mucosa layer enhancement: an adaptive sigmoid function is employed on the R plane of the image to highlight micro-vessels of the superficial layers of the mucosa and submucosa; and (3) color tone enhancement: the pixels are uniformly distributed to create an enhanced color effect to highlight the subtle micro-vessels, mucosa and tissue characteristics...
June 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28522954/current-practices-in-endoscopic-submucosal-dissection-for-colorectal-neoplasms-a-survey-of-indications-among-korean-endoscopists
#2
Tae Jun Kim, Eun Ran Kim, Sung Noh Hong, Young-Ho Kim, Dong Kyung Chang
BACKGROUND/AIMS: The indications for colorectal endoscopic submucosal dissection (ESD) vary in clinical practice. To establish colorectal ESD as a standard treatment, standard indications are essential. For establishing standard indications for colorectal ESD, we surveyed the preferences and criteria of endoscopists for colorectal ESD in their practices. METHODS: A multiple-choice questionnaire was sent to 27 members of the Korean Society of Gastrointestinal Endoscopy/ESD group...
April 2017: Intestinal Research
https://www.readbyqxmd.com/read/28516968/preliminary-experience-with-4k-ultra-high-definition-endoscope-analysis-of-pros-and-cons-in-skull-base-surgery
#3
M Rigante, G La Rocca, L Lauretti, G Q D'Alessandris, A Mangiola, C Anile, A Olivi, G Paludetti
During the last two decades endoscopic skull base surgery observed a continuous technical and technological development 3D endoscopy and ultra High Definition (HD) endoscopy have provided great advances in terms of visualisation and spatial resolution. Ultra-high definition (UHD) 4K systems, recently introduced in the clinical practice, will shape next steps forward especially in skull base surgery field. Patients were operated on through transnasal transsphenoidal endoscopic approaches performed using Olympus NBI 4K UHD endoscope with a 4 mm 0° Ultra Telescope, 300 W xenon lamp (CLV-S400) predisposed for narrow band imaging (NBI) technology connected through a camera head to a high-quality control unit (OTV-S400 - VISERA 4K UHD) (Olympus Corporation, Tokyo, Japan)...
June 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28507710/semiconducting-polymer-dots-with-bright-narrow-band-emission-at-800-nm-for-biological-applications
#4
Dandan Chen, I-Che Wu, Zhihe Liu, Ying Tang, Haobin Chen, Jiangbo Yu, Changfeng Wu, Daniel T Chiu
The development of near-infrared (NIR) fluorescent probes is critical for in vivo exploration of the fundamental and complex processes in living systems by noninvasive fluorescence imaging techniques. Semiconducting polymer dots (Pdots) are emerging as important probes that exhibit several advantages, such as high brightness and biocompatibility. However, NIR-emitting Pdots are very rare, particularly at the center (∼800 nm) of the first optical window of biological tissues (between 650 nm and 950 nm). In this paper, we describe the synthesis of a semiconducting polymer with bright and narrow-band emission at 800 nm...
May 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28503988/the-usefulness-of-narrow-band-imaging-for-the-diagnosis-and-treatment-of-vocal-fold-leukoplakia
#5
Fang Huang, Jinchao Yu, Fan Zhang, Changding He, Shimin Li, Jun Shao
OBJECTIVE: This research was aimed to explore the efficacy of narrow-band imaging (NBI) on distinguishing the degree of dysplasia of vocal fold leukoplakia. METHODS: Patients were examined by flexible endoscopy, under white light endoscopy (WLE) and NBI. 78 lesions were divided into two groups according to the NBI classification. Group 1: non-dysplasia (ND), including squamous hyperplasia with hyperkeratosis or parakeratosis; Group 2: squamous hyperplasia with mild or moderate dysplasia (MD) or severe dysplasia (SD), or carcinoma in situ (CIS)...
May 14, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28500570/narrow-band-imaging-can-increase-the-visibility-of-fibrin-caps-after-bleeding-of-esophageal-varices-a-case-with-extensive-esophageal-candidiasis
#6
Yoshihiro Furuichi, Yoshitaka Kasai, Hirohito Takeuchi, Yuu Yoshimasu, Takashi Kawai, Katsutoshi Sugimoto, Yoshiyuki Kobayashi, Ikuo Nakamura, Takao Itoi
A 58-year-old man with hepatitis B cirrhosis noticed black stools and underwent an endoscopy at a community hospital. The presence of esophageal varices (EVs) was confirmed, but the bleeding point was not found. He was referred to our institution and underwent a second endoscopy. Extensive white patches of esophageal candidiasis were visible on endoscopy by white-light imaging (WLI), but it was difficult to find the fibrin cap of the EVs. This was easier under narrow-band imaging (NBI), however, as the color turned red from absorption by hemoglobin adhered to it...
May 12, 2017: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/28494373/influence-of-li-charge-compensator-ion-on-the-energy-transfer-from-pr-3-to-gd-3-ions-in-ca9mg-po4-6f2-gd-3-pr-3-li-phosphor
#7
Sumedha Tamboli, S J Dhoble
Phototherapy is a renowned treatment for curing skin diseases since ancient times. Phototherapeutic treatment for psoriasis and many other diseases require narrow band ultra violet-B (NB-UVB) light with peak intensity at 313nm to be exposed to the affected part of body. In this paper, we report combustion synthesis of NB-UVB -313nm emitting Ca9Mg(PO4)6F2 phosphors doped with Gd(3+), Pr(3+) and Li(+) ions. The phase formation was confirmed by obtaining X-ray diffraction (XRD) pattern and morphology was studied with the Scanning electron microscopy (SEM) images...
May 2, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28492712/lugol-s-iodine-chromoendoscopy-versus-narrow-band-image-enhanced-endoscopy-for-the-detection-of-esophageal-cancer-in-patients-with-stenosis-secondary-to-caustic-corrosive-agent-ingestion
#8
Caterina Maria Pia Simoni Pennachi, Diogo Turiani Hourneaux de Moura, Renato Bastos Pimenta Amorim, Hugo Gonçalo Guedes, Vivek Kumbhari, Eduardo Guimarães Hourneaux de Moura
BACKGROUND: The diagnosis of corrosion cancer should be suspected in patients with corrosive ingestion if after a latent period of negligible symptoms there is development of dysphagia, or poor response to dilatation, or if respiratory symptoms develop in an otherwise stable patient of esophageal stenosis. Narrow Band Imaging detects superficial squamous cell carcinoma more frequently than white-light imaging, and has significantly higher sensitivity and accuracy compared with white-light...
May 8, 2017: Arquivos de Gastroenterologia
https://www.readbyqxmd.com/read/28489743/narrow-band-imaging-endoscopy-is-advantageous-over-conventional-white-light-endoscopy-for-the-diagnosis-and-treatment-of-children-with-peutz-jeghers-syndrome
#9
Weiwei Cheng, Haifeng Liu, Zhujun Gu, Zhihong Hu, Ling Wang, Xing Wang
Using narrow-band imaging (NBI), the micro morphology of polyp surfaces was visualized at high resolution when the contrast between the lesions and the surrounding tissue areas was intensified. The objective of the study was to compare NBI and conventional white light endoscopy (C-WLI) for diagnostic efficacy and treatment of children with Peutz-Jeghers syndrome (PJS), a rare autosomal dominant-genetic disease.We retrospectively analyzed the clinical data of 18 patients diagnosed with PJS and 72 diagnosed with juvenile polyps during the same time period...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28484788/-narrow-band-imaging-for-evaluation-of-laryngeal-mucosal-lesions
#10
N Davaris, S Voigt-Zimmermann, A Roessner, C Arens
The use of narrow band imaging (NBI) and further technological achievements concerning the resolution and magnification of endoscopic images have revolutionized laryngology in the past 10 years. The diagnosis and therapy of dysplasia and early laryngeal carcinoma have become significantly easier. There are also clear benefits for benign laryngeal lesions. Central to these techniques is the assessment of epithelial, connective tissue and vascular changes caused by diverse diseases.
May 8, 2017: HNO
https://www.readbyqxmd.com/read/28472835/narrow-band-imaging-in-the-diagnosis-of-deep-submucosal-colorectal-cancers-a-systematic-review-and-meta-analysis
#11
Qing-Wei Zhang, La-Mei Teng, Xin-Tian Zhang, Jing-Jing Zhang, Ying Zhou, Zhi-Rui Zhou, Yi-Chao Hou, Zhi-Zheng Ge, Xiao-Bo Li
Background and aims Magnifying endoscopy with narrow-band imaging (M-NBI) has been widely used in the differential diagnosis of deep submucosal colorectal cancers (dSMCs) from superficial submucosal cancers (sSMCs) and intramucosal neoplasms. We aimed to pool the diagnostic efficacy of M-NBI and compare it with that of magnifying chromoendoscopy (M-CE) in diagnosing colorectal dSMC. Methods PubMed, EMBASE, and the Cochrane Library were searched to identify eligible studies. Meeting abstracts were also searched...
May 4, 2017: Endoscopy
https://www.readbyqxmd.com/read/28469370/narrow-band-imaging-for-diagnosis-of-squamous-cell-carcinoma-in-the-anal-canal
#12
Yoji Takeuchi, Artur Nemeth, Otto Ljungberg, Ervin Toth, Henrik Thorlacius
No abstract text is available yet for this article.
2017: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/28469360/investigation-of-mucosal-pattern-of-gastric-antrum-using-magnifying-narrow-band-imaging-in-patients-with-chronic-atrophic-fundic-gastritis
#13
Yasushi Yamasaki, Noriya Uedo, Hiromitsu Kanzaki, Minoru Kato, Kenta Hamada, Kenji Aoi, Yusuke Tonai, Noriko Matsuura, Takashi Kanesaka, Takeshi Yamashina, Tomofumi Akasaka, Noboru Hanaoka, Yoji Takeuchi, Koji Higashino, Ryu Ishihara, Yasuhiko Tomita, Hiroyasu Iishi
BACKGROUND: Magnifying narrow-band imaging (M-NBI) can reportedly help predict the presence and distribution of atrophy and intestinal metaplasia in the gastric corpus. However, the micro-mucosal pattern of the antrum shown by M-NBI differs from that of the corpus. We studied the distribution and histology of the micro-mucosal pattern in the antrum based on magnifying endoscopy. METHODS: Endoscopic images of the greater curvature of the antrum were evaluated in 50 patients with chronic atrophic fundic gastritis (CAFG)...
2017: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/28462888/blood-sucking-hookworm-under-narrow-band-imaging
#14
Surinder S Rana, Ravi Sharma, Vishal Sharma, Rajesh Gupta
No abstract text is available yet for this article.
April 8, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28458062/experimental-performance-assessment-of-the-sub-band-minimum-variance-beamformer-for-ultrasound-imaging
#15
Konstantinos Diamantis, Alan Greenaway, Tom Anderson, Jørgen Arendt Jensen, Vassilis Sboros
Recent progress in adaptive beamforming techniques for medical ultrasound has shown that current resolution limits can be surpassed. One method of obtaining improved lateral resolution is the Minimum Variance (MV) beamformer. The frequency domain implementation of this method effectively divides the broadband ultrasound signals into sub-bands (MVS) to conform with the narrow-band assumption of the original MV theory. This approach is investigated here using experimental Synthetic Aperture (SA) data from wire and cyst phantoms...
April 21, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28455406/role-of-narrow-band-imaging-in-the-diagnostics-of-sinonasal-pathology
#16
Kristian Bruun Petersen, Thomas Kjaergaard
Malignancies of the nasal cavity and paranasal sinuses are well known, but have uncommon presentations. Late diagnosis and local extension are significant prognostic factors associated with a poorer treatment outcome. Thus, refinements of the diagnostic procedures to enhance the sensitivity of the clinical evaluation are desirable. We here describe a case of endonasal lymphoma, in which the lesion was hardly visible and initially ignored at ordinary white light (WLI) nasoendoscopy, but easily recognisable, clearly pathogenic and well demarcated when illuminated with narrow band imaging (NBI) at a later session...
April 28, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28455370/decorrelated-input-dissociates-narrow-band-gamma-power-and-bold-in-human-visual-cortex
#17
R Butler, P M Bernier, J Lefebvre, Guillaume Gilbert, K Whittingstall
Although Functional Magnetic Resonance imaging (fMRI) using the blood-oxygen-level-dependent (BOLD) contrast is widely used for non-invasively mapping hemodynamic brain activity in humans, its exact link to underlying neural processing is poorly understood. While some studies have reported that BOLD signals measured in visual cortex are tightly linked to neural activity in the narrow band gamma (NBG) range, others have found a weak correlation between the two. To elucidate the mechanisms behind these conflicting findings, we hypothesized that BOLD reflects the strength of synaptic inputs to cortex whereas NBG is more dependent on how well these inputs are correlated...
April 28, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28451372/plasmonic-labeling-of-subcellular-compartments-in-cancer-cells-multiplexing-with-fine-tuned-gold-and-silver-nanoshells
#18
R G Sobral-Filho, A M Brito-Silva, M Isabelle, A Jirasek, J J Lum, A G Brolo
Fine-tuned gold and silver nanoshells were produced via an entirely reformulated synthesis. The new method yielded ultramonodisperse samples, with polydispersity indexes (PI) as low as 0.02 and narrow extinction bands suited for multiplex analysis. A library of nanoshell samples with localized surface plasmon resonances (LSPR) spanning across the visible range was synthesized. Hyperspectral analysis revealed that the average scattering spectrum of 100 nanoshells matched closely to the spectrum of a single nanoshell, indicating an unprecedented low level of nanoparticle-to-nanoparticle variation for this type of system...
April 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28449341/gastrointestinal-idiopathic-granulomatous-gastritis-observed-by-magnifying-narrow-band-imaging-endoscopy
#19
K Kawasaki, K Kurahara, Y Oshiro, K Ohtsu, S Nakamura, T Fuchigami, T Matsumoto
No abstract text is available yet for this article.
May 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28449147/french-comment-on-article-evaluation-of-narrow-band-imaging-signs-in-eosinophilic-and-lymphocytic-esophagitis
#20
(no author information available yet)
No abstract text is available yet for this article.
May 2017: Endoscopy
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