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Video capsule endoscopy

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https://www.readbyqxmd.com/read/29682270/an-automatic-bleeding-frame-and-region-detection-scheme-for-wireless-capsule-endoscopy-videos-based-on-interplane-intensity-variation-profile-in-normalized-rgb-color-space
#1
Amit Kumar Kundu, Shaikh Anowarul Fattah, Mamshad Nayeem Rizve
Wireless capsule endoscopy (WCE) is an effective video technology to diagnose gastrointestinal (GI) disease, such as bleeding. In order to avoid conventional tedious and risky manual review process of long duration WCE videos, automatic bleeding detection schemes are getting importance. In this paper, to investigate bleeding, the analysis of WCE images is carried out in normalized RGB color space as human perception of bleeding is associated with different shades of red. In the proposed method, at first, from the WCE image frame, an efficient region of interest (ROI) is extracted based on interplane intensity variation profile in normalized RGB space...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29622900/unsuspected-small-bowel-crohn-s-disease-in-elderly-patients-diagnosed-by-video-capsule-endoscopy
#2
Che-Yung Chao, Carl Frederic Duchatellier, Ernest G Seidman
Background: Video capsule endoscopy (VCE) is increasingly performed among the elderly for obscure bleeding. Our aim was to report on the utility of VCE to uncover unsuspected Crohn's disease (CD) in elderly patients. Methods: Retrospective review of VCE performed in elderly patients (≥70 y) at a tertiary hospital (2010-2015). All underwent prior negative bidirectional endoscopies. CD diagnosis was based on consistent endoscopic findings, exclusion of other causes, and a Lewis endoscopic score (LS) > 790 (moderate-to-severe inflammation)...
2018: Diagnostic and Therapeutic Endoscopy
https://www.readbyqxmd.com/read/29610089/design-and-simulation-of-a-ring-shaped-linear-array-for-microultrasound-capsule-endoscopy
#3
Holly S Lay, Benjamin F Cox, Vipin Seetohul, Christine E M Demore, Sandy Cochran
Video capsule endoscopy (VCE) has significantly advanced visualization of the gastrointestinal tract since its introduction in the last 20 years. Work is now under way to combine VCE with microultrasound imaging. However, small maximum capsule dimensions, coupled with the electronics required to integrate ultrasound imaging capabilities, pose significant design challenges. This paper describes a simulation process for testing transducer geometries and imaging methodologies to achieve satisfactory imaging performance within the physical limitations of the capsule size and outlines many of the tradeoffs needed in the design of this new class of ultrasound capsule endoscopy (USCE) device...
April 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29599946/organic-boundary-location-based-on-color-texture-of-visual-perception-in-wireless-capsule-endoscopy-video
#4
Chengliang Wang, Zhuo Luo, Xiaoqi Liu, Jianying Bai, Guobin Liao
This paper addresses the problem of automatically locating the boundary between the stomach and the small intestine (the pylorus) in wireless capsule endoscopy (WCE) video. For efficient image segmentation, the color-saliency region detection (CSD) method is developed for obtaining the potentially valid region of the frame (VROF). To improve the accuracy of locating the pylorus, we design the Monitor-Judge model. On the one hand, the color-texture fusion feature of visual perception (CTVP) is constructed by grey level cooccurrence matrix (GLCM) feature from the maximum moments of the phase congruency covariance and hue-saturation histogram feature in HSI color space...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29588845/pedunculated-polyp-of-the-ileum-protruding-from-a-large-diverticulum
#5
REVIEW
Yugo Iwaya, Corwyn Rowsell, Teodor Grantcharov, Norman E Marcon
Introduction: A 52-year-old woman presented with iron deficiency anaemia and postprandial right lower quadrant pain. Abdominal examination was unremarkable and laboratory results showed mild anaemia (haemoglobin 11.3 g/dL). Upper and lower endoscopies did not reveal any source of bleeding. Video capsule endoscopy was performed which showed a large polypoid lesion in the mid-ileum (figure 1). Abdominal contrast enhanced CT demonstrated a heterogeneously enhancing pedunculated polyp measuring approximately 6 cm (figure 2)...
April 2018: Frontline Gastroenterology
https://www.readbyqxmd.com/read/29531578/video-capsule-endoscopy-in-pediatric-patients-with-crohn-s-disease-a-single-center-experience-of-180-procedures
#6
Artur Nemeth, Daniel Agardh, Gabriele Wurm Johansson, Henrik Thorlacius, Ervin Toth
Background: Video capsule endoscopy (VCE) is a noninvasive method enabling excellent visualization of the small bowel (SB) mucosa. The aim of this study was to examine the impact and safety of VCE performed in children and adolescents with suspected or established Crohn's disease (CD). Methods: A total of 180 VCE examinations in 169 consecutive patients conducted in 2003-14 in a single center were retrospectively analyzed. The median age was 13 years (range 3-17 years) and indications for VCE were suspected (125 cases, 69%) and established (55 cases, 31%) CD...
2018: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/29486502/colon-capsule-versus-computed-tomography-colonography-for-colorectal-cancer-screening-in-patients-with-positive-fecal-occult-blood-test-who-refuse-colonoscopy-a-randomized-trial
#7
Mathieu Pioche, Christell Ganne, Rodica Gincul, Antoine De Leusse, Julien Marsot, Julien Balique, Alain Fond, Michel Bretagnolle, Luc Henry, Yann Billaud, Romain Malezieux, Marie-Georges Lapalus, Christine Chambon-Augoyard, Emilie Del Tedesco, Olivia Scalone, Jean-Charles Montoy, Benoit Russias, Antoine Detry, Frédéric Veniat, Jin Qiu, Pierre-Jean Valette, Annabel Taillandier, Jean-Christophe Saurin, Josiane Tomczyk-Ferrero, Clémentine Gandilhon, Léa Vecchiato, Patricia Soler-Michel, Thierry Ponchon
OBJECTIVE:  Some patients (10 % - 32 %) with a positive guaiac fecal occult blood test (gFOBT) do not undergo the recommended colonoscopy. The aim of this study was to compare video capsule endoscopy (VCE) and computed tomography colonography (CTC) in terms of participation rate and detection outcomes when offered to patients with a positive gFOBT who did not undergo the recommended colonoscopy. METHODS:  An invitation letter offering CTC or VCE was sent to selected patients after randomization...
February 27, 2018: Endoscopy
https://www.readbyqxmd.com/read/29470172/hookworm-detection-in-wireless-capsule-endoscopy-images-with-deep-learning
#8
Jun-Yan He, Xiao Wu, Yu-Gang Jiang, Qiang Peng, Ramesh Jain
As one of the most common human helminths, hookworm is a leading cause of maternal and child morbidity, which seriously threatens human health. Recently, wireless capsule endoscopy (WCE) has been applied to automatic hookworm detection. Unfortunately, it remains a challenging task. In recent years, deep convolutional neural network (CNN) has demonstrated impressive performance in various image and video analysis tasks. In this paper, a novel deep hookworm detection framework is proposed for WCE images, which simultaneously models visual appearances and tubular patterns of hookworms...
May 2018: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/29468094/chobs-color-histogram-of-block-statistics-for-automatic-bleeding-detection-in-wireless-capsule-endoscopy-video
#9
Tonmoy Ghosh, Shaikh Anowarul Fattah, Khan A Wahid
Wireless capsule endoscopy (WCE) is the most advanced technology to visualize whole gastrointestinal (GI) tract in a non-invasive way. But the major disadvantage here, it takes long reviewing time, which is very laborious as continuous manual intervention is necessary. In order to reduce the burden of the clinician, in this paper, an automatic bleeding detection method for WCE video is proposed based on the color histogram of block statistics, namely CHOBS. A single pixel in WCE image may be distorted due to the capsule motion in the GI tract...
2018: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/29453774/hobnail-retiform-dabska-hemangioendothelioma-located-in-jejunum
#10
Yuxin Wang, Huan Han, Yiqi Du
A 27-year-old man referred to our department with a 1-month history of intermittent melena and dizziness. Gastroscopy and colonoscopy did not identify the site of bleeding. Laboratory data showed hemoglobin 6.6g/dL. Video capsule endoscopy (CE, Anhon,China) and antegrade double-ballon enteroscopy (DBE, EN450P5, Fujinon, Japan) were carried out and a space occupying lesion in the proximal jejunum was identified (Fig.1). Ink tattooing via DBE was performed to mark the site of the tumor.Then the patient underwent jejunectomy...
February 17, 2018: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/29449505/detection-of-crohn-disease-in-patients-with-spondyloarthropathy-the-space-capsule-study
#11
Uri Kopylov, Michael Starr, Craig Watts, Serge Dionne, Marc Girardin, Ernest G Seidman
OBJECTIVE: Inflammatory bowel disease (IBD) is generally reported to be associated with spondylarthropathies (SpA) in 5%-15% of cases. Systematic colonoscopic assessment by protocol demonstrated mucosal inflammation characteristic of Crohn disease (CD) in up to one-third of patients with SpA. Video capsule endoscopy (CE) is a superior diagnostic tool to detect small bowel mucosal disease. Our study compared the accuracy of CE to standard colonoscopy for detection of inflammatory bowel lesions in patients with SpA, and to describe predictors of small bowel inflammation (SBI) in this cohort...
February 15, 2018: Journal of Rheumatology
https://www.readbyqxmd.com/read/29409067/meta-analysis-of-randomized-controlled-trials-challenging-the-usefulness-of-purgative-preparation-before-small-bowel-video-capsule-endoscopy
#12
Paraskevas Gkolfakis, Georgios Tziatzios, George D Dimitriadis, Konstantinos Triantafyllou
BACKGROUND:  The usefulness of purgative preparation before small-bowel video capsule endoscopy is controversial. We aimed to examine the effect of purgative preparation on small-bowel video capsule endoscopy outcomes. METHODS:  We performed literature searches in MEDLINE and the Cochrane library for randomized controlled trials evaluating the effect of purgative preparation (polyethylene glycol, sodium phosphate, others) vs. clear-liquid diet/fasting in patients undergoing small-bowel capsule endoscopy...
February 6, 2018: Endoscopy
https://www.readbyqxmd.com/read/29407997/cluster-based-statistical-feature-extraction-method-for-automatic-bleeding-detection-in-wireless-capsule-endoscopy-video
#13
Tonmoy Ghosh, Shaikh Anowarul Fattah, Khan A Wahid, Wei-Ping Zhu, M Omair Ahmad
Wireless capsule endoscopy (WCE) is capable of demonstrating the entire gastrointestinal tract at an expense of exhaustive reviewing process for detecting bleeding disorders. The main objective is to develop an automatic method for identifying the bleeding frames and zones from WCE video. Different statistical features are extracted from the overlapping spatial blocks of the preprocessed WCE image in a transformed color plane containing green to red pixel ratio. The unique idea of the proposed method is to first perform unsupervised clustering of different blocks for obtaining two clusters and then extract cluster based features (CBFs)...
January 5, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29399619/novel-experimental-and-software-methods-for-image-reconstruction-and-localization-in-capsule-endoscopy
#14
Anastasios Koulaouzidis, Dimitris K Iakovidis, Diana E Yung, Evangelos Mazomenos, Federico Bianchi, Alexandros Karagyris, George Dimas, Danail Stoyanov, Henrik Thorlacius, Ervin Toth, Gastone Ciuti
Background and study aims : Capsule endoscopy (CE) is invaluable for minimally invasive endoscopy of the gastrointestinal tract; however, several technological limitations remain including lack of reliable lesion localization. We present an approach to 3D reconstruction and localization using visual information from 2D CE images. Patients and methods : Colored thumbtacks were secured in rows to the internal wall of a LifeLike bowel model. A PillCam SB3 was calibrated and navigated linearly through the lumen by a high-precision robotic arm...
February 2018: Endoscopy International Open
https://www.readbyqxmd.com/read/29399040/clinical-outcome-of-patients-with-obscure-gastrointestinal-bleeding-during-antithrombotic-drug-therapy
#15
Yoshiyasu Kono, Seiji Kawano, Yuki Okamoto, Yuka Obayashi, Yuki Baba, Hiroyuki Sakae, Makoto Abe, Tatsuhiro Gotoda, Toshihiro Inokuchi, Hiromitsu Kanzaki, Masaya Iwamuro, Yoshiro Kawahara, Hiroyuki Okada
Background: The clinical outcome of patients with obscure gastrointestinal bleeding (OGIB) during antithrombotic drug therapy has not been fully investigated. Methods: Patients who underwent video capsule endoscopy (VCE) for the investigation of OGIB at Okayama University Hospital from January 2009 to March 2016 were enrolled. We evaluated the VCE findings, the patterns of OGIB, and the rate of rebleeding within 1 year in antithrombotic drug users and antithrombotic drug nonusers...
2018: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/29396130/meta-analysis-shows-similar-re-bleeding-rates-among-western-and-eastern-populations-after-index-video-capsule-endoscopy
#16
REVIEW
Georgios Tziatzios, Paraskevas Gkolfakis, Cesare Hassan, Ervin Toth, Angelo Zullo, Anastasios Koulaouzidis, George D Dimitriadis, Konstantinos Triantafyllou
BACKGROUND & AIMS: Video capsule endoscopy (VCE) is the first-line diagnostic procedure for investigating obscure gastrointestinal bleeding (OGIB). Different re-bleeding rates following index VCE have been reported among Western and Eastern studies. METHODS: We conducted a comprehensive literature search to identify studies examining re-bleeding rates after VCE for OGIB. Meta-analysis assessed the pooled proportion of re-bleeding events after VCE for OGIB according to study's origin (Western vs...
January 9, 2018: Digestive and Liver Disease
https://www.readbyqxmd.com/read/29372393/approach-to-the-diagnostic-workup-and-management-of-small-bowel-lesions-at-a-tertiary-care-center
#17
Jonathan Green, Christopher R Schlieve, Ann K Friedrich, Kevin Baratta, David H Ma, May Min, Krunal Patel, David Stein, David R Cave, Demetrius E Litwin, Mitchell A Cahan
BACKGROUND: Small bowel lesions (SBL) are rare, representing diagnostic and management challenges. The purpose of this cross-sectional study was to evaluate diagnostic modalities used and management practices of patients with SBL at an advanced endoscopic referral center. METHODS: We analyzed patients undergoing surgical management for SBL from 2005 to 2015 at a single tertiary care center. Patients were stratified into gastrointestinal bleed/anemia (GIBA) or obstruction/pain (OP)...
January 25, 2018: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/29317942/carcinoids-and-capsules-a-case-series-highlighting-the-utility-of-capsule-endoscopy-in-patients-with-small-bowel-carcinoids
#18
Michael G Noujaim, Jonathan Green, May Min, Christopher R Schlieve, Krunal Patel, Mitchell Cahan, David Cave
Background: Neuroendocine tumors (NETs) or carcinoids arise at many different sites of the gastrointestinal tract. The small intestine is the most common site for NETs. Diagnosing small bowel carcinoids remains challenging given their non-specific presentations and the overall low incidence of small bowel tumors. Video capsule endoscopy (VCE) has significanly improved our ability to detect small bowel malignancies. We explore the value of VCE in the initial workup and management of a series of small bowel carcinoid patients...
December 2017: Gastroenterology Research
https://www.readbyqxmd.com/read/29245165/video-capsule-endoscopy-diagnosis-of-takayasu-s-arteritis
#19
Carolina Olano, Henry Cohen
No abstract text is available yet for this article.
March 2018: Endoscopy
https://www.readbyqxmd.com/read/29238592/predictors-and-characteristics-of-angioectasias-in-patients-with-obscure-gastrointestinal-bleeding-identified-by-video-capsule-endoscopy
#20
Simon Nennstiel, Annkathrin Machanek, Stefan von Delius, Bruno Neu, Bernhard Haller, Mohamed Abdelhafez, Roland M Schmid, Christoph Schlag
Background: In obscure gastrointestinal bleeding, angioectasias are common findings in video capsule endoscopy (VCE). Objective: The objective of this study was to identify predictors and characteristics of small bowel angioectasias. Methods: Video capsule examinations between 1 July 2001 and 31 July 2011 were retrospectively reviewed. Patients with obscure gastrointestinal bleeding were identified, and those with small bowel angioectasia were compared with patients without a definite bleeding source...
December 2017: United European Gastroenterology Journal
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