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https://www.readbyqxmd.com/read/27912216/endoscopic-features-of-an-adenoid-cystic-carcinoma-of-the-esophagus-narrow-band-imaging-and-dual-focus-magnification
#1
Franck Nicolas Bardou, Jérôme Rivory, Maud Robert, Diane Collet Benzaquen, Jean-François Fléjou, Thierry Ponchon, Mathieu Pioche
No abstract text is available yet for this article.
January 2016: Endoscopy
https://www.readbyqxmd.com/read/27910567/a-high-resolution-ir-visible-imaging-system-for-the-w7-x-limiter
#2
G A Wurden, L A Stephey, C Biedermann, M W Jakubowski, J P Dunn, M Gamradt
A high-resolution imaging system, consisting of megapixel mid-IR and visible cameras along the same line of sight, has been prepared for the new W7-X stellarator and was operated during Operational Period 1.1 to view one of the five inboard graphite limiters. The radial line of sight, through a large diameter (184 mm clear aperture) uncoated sapphire window, couples a direct viewing 1344 × 784 pixel FLIR SC8303HD camera. A germanium beam-splitter sends visible light to a 1024 × 1024 pixel Allied Vision Technologies Prosilica GX1050 color camera...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910471/the-national-ignition-facility-modular-kirkpatrick-baez-microscope
#3
L A Pickworth, J Ayers, P Bell, N F Brejnholt, J G Buscho, D Bradley, T Decker, S Hau-Riege, J Kilkenny, T McCarville, T Pardini, J Vogel, C Walton
Current two-dimensional X-ray imaging at the National Ignition Facility (NIF) uses time resolved pinhole cameras with ∼10-25 μm pinholes. This method has limitations in the smallest resolvable features that can be imaged with reasonable photon statistics for inertial confinement fusion (ICF) applications. ICF sources have a broadband self-emission spectrum that causes the pinhole images obtained, through thin foil filters, to contain a similarly broadband spectrum complicating the interpretation of structure in the source...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910456/two-color-spatial-and-temporal-temperature-measurements-using-a-streaked-soft-x-ray-imager
#4
A S Moore, J Benstead, M F Ahmed, J Morton, T M Guymer, R Soufli, T Pardini, R L Hibbard, C G Bailey, P M Bell, S Hau-Riege, M Bedzyk, M J Shoup, S P Regan, T Agliata, R Jungquist, D W Schmidt, L B Kot, W J Garbett, M S Rubery, J W Skidmore, E Gullikson, F Salmassi
A dual-channel streaked soft x-ray imager has been designed and used on high energy-density physics experiments at the National Ignition Facility. This streaked imager creates two images of the same x-ray source using two slit apertures and a single shallow angle reflection from a nickel mirror. Thin filters are used to create narrow band pass images at 510 eV and 360 eV. When measuring a Planckian spectrum, the brightness ratio of the two images can be translated into a color-temperature, provided that the spectral sensitivity of the two images is well known...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27904863/recent-updates-in-the-endoscopic-diagnosis-of-barrett-s-oesophagus
#5
REVIEW
Neel Sharma, Khek Yu Ho
BACKGROUND: Barrett's oesophagus (BO) is a premalignant condition associated with the development of oesophageal adenocarcinoma (OAC). Despite the low risk of progression per annum, OAC is associated with significant morbidity and mortality, with an estimated 5-year survival of 10%. Furthermore, the incidence of OAC continues to rise globally. Therefore, it is imperative to detect the premalignant phase of BO and follow up such patients accordingly. SUMMARY: The mainstay diagnosis of BO is endoscopy and biopsy sampling...
October 2016: Gastrointestinal Tumors
https://www.readbyqxmd.com/read/27895406/simplified-criteria-for-diagnosing-superficial-esophageal-squamous-neoplasms-using-narrow-band-imaging-magnifying-endoscopy
#6
Akira Dobashi, Kenichi Goda, Noboru Yoshimura, Tomohiko R Ohya, Masayuki Kato, Kazuki Sumiyama, Masato Matsushima, Shinichi Hirooka, Masahiro Ikegami, Hisao Tajiri
AIM: To simplify the diagnostic criteria for superficial esophageal squamous cell carcinoma (SESCC) on Narrow Band Imaging combined with magnifying endoscopy (NBI-ME). METHODS: This study was based on the post-hoc analysis of a randomized controlled trial. We performed NBI-ME for 147 patients with present or a history of squamous cell carcinoma in the head and neck, or esophagus between January 2009 and June 2011. Two expert endoscopists detected 89 lesions that were suspicious for SESCC lesions, which had been prospectively evaluated for the following 6 NBI-ME findings in real time: "intervascular background coloration"; "proliferation of intrapapillary capillary loops (IPCL)"; and "dilation", "tortuosity", "change in caliber", and "various shapes (VS)" of IPCLs (i...
November 7, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27895234/ultraviolet-raman-wide-field-hyperspectral-imaging-spectrometer-for-standoff-trace-explosive-detection
#7
Kyle T Hufziger, Sergei V Bykov, Sanford A Asher
We constructed the first deep ultraviolet (UV) Raman standoff wide-field imaging spectrometer. Our novel deep UV imaging spectrometer utilizes a photonic crystal to select Raman spectral regions for detection. The photonic crystal is composed of highly charged, monodisperse 35.5 ± 2.9 nm silica nanoparticles that self-assemble in solution to produce a face centered cubic crystalline colloidal array that Bragg diffracts a narrow ∼1.0 nm full width at half-maximum (FWHM) UV spectral region. We utilize this photonic crystal to select and image two different spectral regions containing resonance Raman bands of pentaerythritol tetranitrate (PETN) and NH4NO3 (AN)...
November 28, 2016: Applied Spectroscopy
https://www.readbyqxmd.com/read/27894979/-comparison-of-white-light-photodynamic-diagnosis-and-narrow-band-imaging-in-detection-of-carcinoma-in-situ-cis-or-flat-dysplasia-at-transurethral-resection-of-the-bladder-the-dablaca-8-study
#8
Ditte Drejer, Sami Béji, Recep Oezeke, Anna Munk Nielsen, Søren Høyer, Truls Erik Bjerklund Johansen, Gitte W Lam, Jørgen B Jensen
: Photodynamic diagnosis (PDD) and narrow band imaging (NBI) are two different modalities used to improve detection of tumors, carcinoma in situ (CIS) and flat dysplasia compared to white light (WL) cystoscopy. OBJECTIVES: To compare findings in NBI to findings in WL and PDD in a high risk patient population. DESIGN, SETTING, AND PARTICIPANTS: 171 patients were included in the study from four different urological departments in Denmark and Norway...
November 25, 2016: Urology
https://www.readbyqxmd.com/read/27894928/per-oral-video-cholangiopancreatoscopy-with-narrow-band-imaging-for-the-evaluation-of-indeterminate-pancreaticobiliary-disease
#9
Rawad Mounzer, Gregory L Austin, Sachin Wani, Brian C Brauer, Norio Fukami, Raj J Shah
BACKGROUND AND AIMS: Cholangiopancreatoscopy in evaluating pancreaticobiliary pathology is currently limited by suboptimal optics. The aim of this study was to characterize the operating characteristics of per-oral video cholangiopancreatoscopy with narrow-band imaging (POVCP) findings in indeterminate pancreaticobiliary disease and describe their association with neoplasia. METHODS: Data from consecutive patients undergoing POVCP for the evaluation of indeterminate pancreaticobiliary disease at a single tertiary care center were analyzed...
November 25, 2016: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/27878600/narrow-band-imaging-for-early-diagnosis-of-epithelial-dysplasia-and-microinvasive-tumors-in-the-upper-aerodigestive-tract
#10
C Arens, C Betz, M Kraft, S Voigt-Zimmermann
The various stages of tumor growth are characterized by typical epithelial, vascular, and secondary connective tissue changes. Narrow Band Imaging (NBI) endoscopy is a minimally invasive imaging technique that presents vascular structures in particular at a higher contrast than white light endoscopy alone. In combination with high-resolution image recording and reproduction (high-definition television, HDTV; ultra-high definition, 4K), progress has been made in otolaryngological differential diagnostics, both pre- and intraoperatively...
November 23, 2016: HNO
https://www.readbyqxmd.com/read/27876633/classification-of-nuclear-morphology-in-endocytoscopy-of-colorectal-neoplasms
#11
Toyoki Kudo, Shin-Ei Kudo, Yuichi Mori, Kunihiko Wakamura, Masashi Misawa, Takemasa Hayashi, Hideyuki Miyachi, Atsushi Katagiri, Fumio Ishida, Haruhiro Inoue
BACKGROUND AND AIMS: We investigated endocytoscopy (EC) findings that were considered risk factors for colorectal neoplasms and determined whether they could be used as new indices to identify carcinomas with massive submucosal invasion (SM-m) or worse outcomes. METHODS: We performed a multivariate analysis of 8 factors on EC images to determine whether they were associated with SM-m or worse. Based on the results, we divided the EC3a category of the EC classification into low grade or high grade, and investigated the diagnostic accuracy of this subclassification...
November 19, 2016: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/27859314/the-assessment-of-mucosal-surgical-margins-in-head-and-neck-cancer-surgery-with-narrow-band-imaging
#12
Robert Šifrer, Jure Urbančič, Primož Strojan, Aleksandar Aničin, Miha Žargi
OBJECTIVES/HYPOTHESIS: The diagnostic gain of narrow band imaging in the definition of surgical margins in the treatment of head and neck cancer was evaluated. STUDY DESIGN: A prospective study, blinded to the pathologist, with historical comparison. METHODS: The study group included 45 patients subjected to the intraoperative definition of margins by narrow band imaging. The control group included 55 patients who had undergone standard definition of margins...
November 15, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27853747/can-magnifying-endoscopy-with-narrow-band-imaging-discriminate-between-carcinomas-and-low-grade-adenomas-in-gastric-superficial-elevated-lesions
#13
Takashi Nonaka, Masahiko Inamori, Yasushi Honda, Kenji Kanoshima, Yumi Inoh, Mizue Matsuura, Shiori Uchiyama, Eiji Sakai, Takuma Higurashi, Hidenori Ohkubo, Hiroshi Iida, Hiroki Endo, Koji Fujita, Akihiko Kusakabe, Kazuhiro Atsukawa, Hisao Takahashi, Yoko Tateishi, Shin Maeda, Kenichi Ohashi, Atsushi Nakajima
: Background and study aims: The aim of this study was to investigate the capability of magnifying endoscopy with narrow-band imaging (ME-NBI) to discriminate between early carcinomas (EC) and low grade adenomas (LGA) in gastric superficial elevated epithelial neoplasias. Patients and methods: We investigated 100 consecutive cases of gastric superficial elevated epithelial neoplasias that were removed using endoscopic submucosal dissection. The pathological diagnostic criteria were based on the revised Vienna classification; category 4 (mucosal high grade neoplasia) and category 5 (submucosal invasion by carcinoma) lesions were diagnosed as EC, whereas category 3 (mucosal low grade neoplasia) lesions were diagnosed as LGA...
November 2016: Endoscopy International Open
https://www.readbyqxmd.com/read/27853744/clinical-usefulness-of-narrow-band-imaging-magnifying-colonoscopy-for-assessing-ulcerative-colitis-associated-cancer-dysplasia
#14
Soki Nishiyama, Shiro Oka, Shinji Tanaka, Shintaro Sagami, Ryohei Hayashi, Yoshitaka Ueno, Koji Arihiro, Kazuaki Chayama
Background and study aims: Colitis-associated cancer/dysplasia (CC/D) can affect the life expectancy of patients with ulcerative colitis (UC). Although the utility of magnifying chromocolonoscopy has been shown, the use of optical magnification with narrow band imaging (NBI) for distinguishing CC/D from non-neoplastic lesions in patients with UC has not been reported. We evaluated whether endoscopic findings are distinguishing and thus assessed the clinical usefulness of NBI magnification for differentiating UC-associated lesions...
November 2016: Endoscopy International Open
https://www.readbyqxmd.com/read/27853741/the-nature-of-the-white-opaque-substance-within-colorectal-neoplastic-epithelium-as-visualized-by-magnifying-endoscopy-with-narrow-band-imaging
#15
Kentaro Imamura, Kenshi Yao, Takashi Hisabe, Masami Nambu, Kensei Ohtsu, Tetsuya Ueo, Shinji Yano, Hiroshi Ishihara, Takashi Nagahama, Takao Kanemitsu, Kazutomo Yamasaki, Toshiyuki Matsui, Hiroshi Tanabe, Akinori Iwashita, Tsutomu Daa, Shigeo Yokoyama, Kazuhisa Matsunaga, Munechika Enjoji
Background and study aims: We previously reported our discovery of a white opaque substance (WOS) that is opaque to endoscopic light inside the epithelium while using magnifying endoscopy (ME) to examine gastric epithelial neoplasia. Histopathologic analysis revealed that the WOS comprises minute lipid droplets (LDs) accumulated within the neoplastic epithelium. In addition, the WOS was found in colorectal epithelial neoplasia, although it was unclear whether this WOS corresponded to an accumulation of LDs, as in the stomach...
November 2016: Endoscopy International Open
https://www.readbyqxmd.com/read/27833952/narrow-band-imaging-with-near-focus-mode-for-colorectal-polyps-characterization
#16
Adriana Mihaela Ciocâlteu, Elena Tatiana CârŢână, Dan Nicolae Florescu, Ioana Andreea Gheonea, IonuŢ Mădălin Troponete, Tudorel Ciurea, Dan IonuŢ Gheonea
Conventional white light endoscopy is far from being an ideal tool to detect, characterize, and confirm the nature of colorectal lesions in order to indicate targeted biopsies or polyp resections only when necessary. Minimally invasive imaging techniques have gradually emerged to reveal previously unseen abnormalities to the operator during endoscopic examination. In this respect, technology and applications of narrow band imaging (NBI) are rapidly evolving. Magnification using NBI with near-focus mode has been introduced recently to enable closer examination under the control of a single button...
2016: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/27833394/two-cases-of-adenocarcinoma-occurring-in-sporadic-fundic-gland-polyps-observed-by-magnifying-endoscopy-with-narrow-band-imaging
#17
Kazumi Togo, Tetsuya Ueo, Hirotoshi Yonemasu, Hideho Honda, Tetsuya Ishida, Hiroshi Tanabe, Kenshi Yao, Akinori Iwashita, Kazunari Murakami
Gastric fundic gland polyps (FGPs) are common non-adenomatous gastric polyps arising from normal fundic mucosa without Helicobacter pylori (H. pylori) infection. Although systemic FGPs associated with familial adenomatous polyposis (FAP) often have dysplasia, there are few reports of dysplasia occurring in sporadic FGPs, especially when detected by magnifying endoscopy with narrow band imaging (ME-NBI). We experienced two cases of adenocarcinoma occurring in sporadic FGPs, and their ME-NBI findings were very useful for differentiating FGP with cancer from non-dysplastic FGP...
October 28, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27824566/concepts-and-tradeoffs-in-velocity-estimation-with-plane-wave-contrast-enhanced-doppler
#18
Charles Tremblay-Darveau, Ross Williams, Paul S Sheeran, Laurent Milot, Matthew Bruce, Peter N Burns
While long Doppler ensembles are, in principle, beneficial for velocity estimates, short acoustic pulses must be used in microbubble contrast-enhanced (CE) Doppler to mitigate microbubble destruction. This introduces inherent tradeoffs in velocity estimates with autocorrelators, which are studied here. A model of the autocorrelation function adapted to the microbubble Doppler signal accounting for transit time, the echo frequency uncertainty, and contrast-agent destruction is derived and validated in vitro...
November 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27824564/adaptive-spectral-estimation-methods-in-color-flow-imaging
#19
Yucel Karabiyik, Ingvild Kinn Ekroll, Sturla H Eik-Nes, Jorgen Avdal, Lasse Lovstakken
Clutter rejection for color flow imaging (CFI) remains a challenge due to either a limited amount of temporal samples available or nonstationary tissue clutter. This is particularly the case for interleaved CFI and B-mode acquisitions. Low velocity blood signal is attenuated along with the clutter due to the long transition band of the available clutter filters, causing regions of biased mean velocity estimates or signal dropouts. This paper investigates how adaptive spectral estimation methods, Capon and blood iterative adaptive approach (BIAA), can be used to estimate the mean velocity in CFI without prior clutter filtering...
November 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27823975/narrow-band-imaging-assisted-transurethral-resection-reduces-the-recurrence-risk-of-non-muscle-invasive-bladder-cancer-a-systematic-review-and-meta-analysis
#20
REVIEW
Weiting Kang, Zilian Cui, Qianqian Chen, Dong Zhang, Haiyang Zhang, Xunbo Jin
CONTEXT: Compared with white light imaging (WLI) cystoscopy, narrow band imaging (NBI) cystoscopy could increase the visualization and detection of bladder cancer (BC) at the time of transurethral resection (TUR). NBI cystoscopy could increase the detection of BC, but it remains unclear whether narrow band imaging-assisted transurethral resection (NBI-TUR) could reduce the recurrence risk of non-muscle invasive bladder cancer (NMIBC). Several randomized clinical trials (RCTs) have recently tested the efficacy of NBI-TUR for NMIBC...
November 3, 2016: Oncotarget
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