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https://www.readbyqxmd.com/read/28222812/prevalence-and-risk-factors-for-post-investigation-colorectal-cancer-interval-cancer-after-computed-tomographic-colonography-protocol-for-a-systematic-review
#1
Andrew A Plumb, Anu Obaro, Thomas Fanshawe, Ulysses S Torres, Rachel Baldwin-Cleland, Steve Halligan, David Burling
BACKGROUND: Colorectal cancer (CRC) is a common and important disease. There are different tests for diagnosis, one of which is computed tomographic colonography (CTC). No test is perfect, and patients with normal CTC may subsequently develop CRC (either because it was overlooked originally, or because it has developed in the interim). This is termed post-investigation colorectal cancer (PICRC) or "interval cancer". How frequently this occurs after CTC is not known. The purpose of this systematic review and meta-analysis is to use the primary literature to estimate the PICRC rate after CTC, and explore associated factors...
February 21, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28133138/-case-of-laparoscopic-sigmoidectomy-for-a-patient-with-persistent-descending-mesocolon
#2
Shu Arai, Yoji Nishimura, Shinsuke Kazama, Yusuke Nishizawa, Hideki Ishikawa, Yoshihiro Mori, Takashi Takenoya, Michitoshi Takano
A 65-year-old man with bloody stools was diagnosed with sigmoid colon cancer on colonoscopy. A preoperative barium enema and a computed tomography colonography scan showed a medial displacement of his descending colon. The preoperative clinical diagnosis was stage cT1 colon cancer, N0, M0, cStage I . Laparoscopic sigmoidectomy was performed. We found adhesions between the descending colon mesentery and the pelvic wall, and noted that the descending colon was not fused with the retroperitoneum and was shifted to the midline...
November 2016: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28130651/screening-and-surveillance-of-colorectal-cancer-using-ct-colonography
#3
REVIEW
Manoj Kumar, Brooks D Cash
Colorectal cancer (CRC) is a common cancer among throughout the world with the highest rates in developed countries such as the USA. There is ample evidence demonstrating the beneficial effects of colorectal cancer screening and, largely thanks to screening initiatives and insurance coverage, epidemiologic analyses show a steady decline in both CRC incidence and mortality rates over the last several decades. However, screening rates for CRC in the US remain low and approximately 1 in 3 adults between the ages of 50 and 75 years has not undergone any form of CRC screening, highlighting the need for additional accurate, minimally invasive, and acceptable screening options...
January 27, 2017: Current Treatment Options in Gastroenterology
https://www.readbyqxmd.com/read/28125177/ct-colonography-in-the-detection-of-colorectal-cancer-in-ireland-economical-considerations-and-the-potential-for-centralisation-of-service-provision
#4
EDITORIAL
W Torregianni, J Power, J Feeney
No abstract text is available yet for this article.
October 12, 2016: Irish Medical Journal
https://www.readbyqxmd.com/read/28117881/comparative-effectiveness-of-screening-strategies-for-colorectal-cancer
#5
Afsaneh Barzi, Heinz-Josef Lenz, David I Quinn, Sarmad Sadeghi
BACKGROUND: Screening for colorectal cancer (CRC) has been successful in decreasing the incidence and mortality from CRC. Although new screening tests have become available, their relative impact on CRC outcomes remains unexplored. This study compares the outcomes of various screening strategies on CRC outcomes. METHODS: A Markov model representing the natural history of CRC was built and validated against empiric data from screening trials as well as the Microstimulation Screening Analysis (MISCAN) model...
January 24, 2017: Cancer
https://www.readbyqxmd.com/read/28111691/colorectal-cancer-screening
#6
Pak Wo Webber Chan, Jing Hieng Ngu, Zhongxian Poh, Roy Soetikno
Colorectal cancer, which is the leading cancer in Singapore, can be prevented by increased use of screening and polypectomy. A range of screening strategies such as stool-based tests, flexible sigmoidoscopy, colonoscopy and computed tomography colonography are available, each with different strengths and limitations. Primary care physicians should discuss appropriate screening modalities with their patients, tailored to their individual needs. Physicians, patients and the government should work in partnership to improve uptake of colorectal cancer screening to reduce the morbidity and mortality from colorectal cancer...
January 2017: Singapore Medical Journal
https://www.readbyqxmd.com/read/28105788/retrospective-analysis-of-computed-tomographic-colonography-in-a-rural-hospital
#7
Beom Jun Lee, Adrian Balasingam, Rene Van den Bosch
INTRODUCTION: The aims of this study were to investigate the diagnostic performance of computed tomography colonography (CTC) performed in a rural secondary hospital, and to describe the local pattern of CTC service provision. METHOD: A single site, retrospective observational analysis was conducted for all patients undergoing CTC during the 12-month period from 1st of January to 31st of December 2014 with comparison to available colonoscopy. RESULTS: There were 639 CTCs performed during the 12-months period...
January 20, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28072831/a-probabilistic-method-for-estimation-of-bowel-wall-thickness-in-mr-colonography
#8
Thomas Hampshire, Alex Menys, Asif Jaffer, Gauraang Bhatnagar, Shonit Punwani, David Atkinson, Steve Halligan, David J Hawkes, Stuart A Taylor
MRI has recently been applied as a tool to quantitatively evaluate the response to therapy in patients with Crohn's disease, and is the preferred choice for repeated imaging. Bowel wall thickness on MRI is an important biomarker of underlying inflammatory activity, being abnormally increased in the acute phase and reducing in response to successful therapy; however, a poor level of interobserver agreement of measured thickness is reported and therefore a system for accurate, robust and reproducible measurements is desirable...
2017: PloS One
https://www.readbyqxmd.com/read/28008722/evaluating-distribution-of-the-left-branch-of-the-middle-colic-artery-and-the-left-colic-artery-by-ct-angiography-and-colonography-to-classify-blood-supply-to-the-splenic-flexure
#9
Asako Fukuoka, Takahiro Sasaki, Satoshi Tsukikawa, Nobuyoshi Miyajima, Takehito Ostubo
INTRODUCTION: CT angiography has gained widespread acceptance for preoperative evaluation of blood supply in patients with colorectal cancer. However, there have been few reports that pertain to the splenic flexure, for which surgery is technically difficult. We used preoperative CT angiography and CT colonography to evaluate blood supply to the splenic flexure. METHODS: We defined the splenic flexure as the junction of the distal third of the transverse colon and the proximal third of the descending colon...
December 22, 2016: Asian Journal of Endoscopic Surgery
https://www.readbyqxmd.com/read/27936413/interactive-registration-between-supine-and-prone-scans-in-computed-tomography-colonography-using-band-height-images
#10
Youngchan Song, Hyunna Lee, Ho Chul Kang, Juneseuk Shin, Gil-Sun Hong, Seong Ho Park, Jeongjin Lee, Yeong-Gil Shin
In computed tomographic colonography (CTC), a patient is commonly scanned twice including supine and prone scans to improve the sensitivity of polyp detection. Typically, a radiologist must manually match the corresponding areas in the supine and prone CT scans, which is a difficult and time-consuming task, even for experienced scan readers. In this paper, we propose a method of supine-prone registration utilizing band-height images, which are directly constructed from the CT scans using a ray-casting algorithm containing neighboring shape information...
December 1, 2016: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/27932450/accuracy-of-diffusion-weighted-magnetic-resonance-colonography-in-assessing-mucosal-healing-and-the-treatment-response-in-patients-with-ulcerative-colitis
#11
Valérie Laurent, Sébastien Naudé, Lucine Vuitton, Camille Zallot, Cédric Bauman, Mélanie Girard-Gavanier, Laurent Peyrin-Biroulet
BACKGROUND & AIMS: Using sigmoidoscopy as the gold standard, we assessed the accuracy and responsiveness to change of diffusion-weighted magnetic resonance colonography in ulcerative colitis using the Nancy score. METHODS: 29 ulcerative colitis patients having undergone at least two diffusion-weighted magnetic resonance colonographies were included. Disease activity was evaluated using the Mayo endoscopic subscore and the Nancy score. We determined the accuracy of the Nancy score in the diagnosis of mucosal healing...
December 7, 2016: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/27925483/application-of-gray-level-mapping-in-computed-tomographic-colonography-a-pilot-study-to-compare-with-traditional-surface-rendering-method-for-identification-and-differentiation-of-endoluminal-lesions
#12
COMPARATIVE STUDY
Lih-Shyang Chen, Ta-Wen Hsu, Shao-Jer Chen, Shu-Han Chang, Chih-Wen Lin, Yu-Ruei Chen, Chin-Chiang Hsieh, Shu-Chen Han, Ku-Yaw Chang, Chun-Ju Hou
OBJECTIVE: In traditional surface rendering (SR) computed tomographic endoscopy, only the shape of endoluminal lesion is depicted without gray-level information unless the volume rendering technique is used. However, volume rendering technique is relatively slow and complex in terms of computation time and parameter setting. We use computed tomographic colonography (CTC) images as examples and report a new visualization technique by three-dimensional gray level mapping (GM) to better identify and differentiate endoluminal lesions...
February 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/27918709/spectral-photon-counting-ct-initial-experience-with-dual-contrast-agent-k-edge-colonography
#13
Daniela Muenzel, Daniel Bar-Ness, Ewald Roessl, Ira Blevis, Matthias Bartels, Alexander A Fingerle, Stefan Ruschke, Philippe Coulon, Heiner Daerr, Felix K Kopp, Bernhard Brendel, Axel Thran, Michal Rokni, Julia Herzen, Loic Boussel, Franz Pfeiffer, Roland Proksa, Ernst J Rummeny, Philippe Douek, Peter B Noël
Purpose To investigate the feasibility of using spectral photon-counting computed tomography (CT) to differentiate between gadolinium-based and nonionic iodine-based contrast material in a colon phantom by using the characteristic k edge of gadolinium. Materials and Methods A custom-made colon phantom was filled with nonionic iodine-based contrast material, and a gadolinium-filled capsule representing a contrast material-enhanced polyp was positioned on the colon wall. The colon phantom was scanned with a preclinical spectral photon-counting CT system to obtain spectral and conventional data...
December 2, 2016: Radiology
https://www.readbyqxmd.com/read/27895427/irritable-bowel-syndrome-evaluation-using-computed-tomography-colonography
#14
Hideki Ohgo, Hiroyuki Imaeda, Minoru Yamaoka, Kazuaki Yoneno, Naoki Hosoe, Takeshi Mizukami, Hidetomo Nakamoto
AIM: To evaluate the morphology of the colon in patients with irritable bowel syndrome (IBS) by using computed tomography colonography (CTC). METHODS: Twelve patients with diarrhea type IBS (IBS-D), 13 patients with constipation type IBS (IBS-C), 12 patients with functional constipation (FC) and 14 control patients underwent colonoscopy following CTC. The lengths of the rectosigmoid colon, transverse colon and the total colon were measured. The diameters of the rectum, sigmoid colon, descending colon, transverse colon, and ascending colon were measured...
November 14, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27893377/high-performance-cad-ctc-scheme-using-shape-index-multiscale-enhancement-filters-and-radiomic-features
#15
Yacheng Ren, Jingchen Ma, Junfeng Xiong, Lin Lu, Jun Zhao
OBJECTIVE: Computer-aided detection (CAD) systems for computed tomography colonography (CTC) can automatically detect colorectal polyps. The main problem of currently developed CAD-CTC systems is the numerous false positives (FPs) caused by the existence of complicated colon structures (e.g., haustral fold, residual fecal material, inflation tube, and ileocecal valve). This study proposes a CAD-CTC scheme using shape index, multiscale enhancement filters, and radiomic features to address the FP issue...
November 22, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/27882202/computed-tomography-colonography-phantom-construction-validation-and-literature-review
#16
Lukas Lambert, Alena Lambertova, Jan Danes, Gabriela Grusova
BACKGROUND: Several dedicated computed tomography (CT) colonography phantoms have been described previously. OBJECTIVES: To compare their pros and cons and describe the construction of a dedicated phantom that can be easily manufactured. MATERIALS AND METHODS: We found 15 different phantom designs by literature search and compared their advantages and disadvantages based on their description and images. We tested various materials for density and mechanical properties and constructed a phantom from polypropylene pipes (30 mm and 50 mm in diameter, 52 cm in length)...
October 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27867950/review-capsule-colonoscopy-a-concise-clinical-overview-of-current-status
#17
REVIEW
Diana E Yung, Emanuele Rondonotti, Anastasios Koulaouzidis
The colon capsule endoscopy (CCE) was first introduced in 2007. Currently, the main clinical indications for CCE are completion of incomplete colonoscopy, polyp detection and investigation of inflammatory bowel disease (IBD). Although conventional colonoscopy is the gold standard in bowel cancer screening, incomplete colonoscopy remains a problem as lesions are missed. CCE compares favourably to computer tomography colonography (CTC) in adenoma detection and has therefore been proposed as a method for completing colonoscopy...
October 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/27864601/predictors-of-primary-care-provider-adoption-of-ct-colonography-for-colorectal-cancer-screening
#18
Jennifer M Weiss, David H Kim, Maureen A Smith, Aaron Potvien, Jessica R Schumacher, Ronald E Gangnon, B Dustin Pooler, Patrick R Pfau, Perry J Pickhardt
PURPOSE: To examine factors influencing primary care provider (PCP) adoption of CT colonography (CTC) for colorectal cancer (CRC) screening. MATERIALS AND METHODS: We performed a retrospective cohort study linking electronic health record (EHR) data with PCP survey data. Patients were eligible for inclusion if they were not up-to-date with CRC screening and if they had CTC insurance coverage in the year prior to survey administration. PCPs were included if they had at least one eligible patient in their panel and completed the survey (final sample N = 95 PCPs; N = 6245 patients)...
November 19, 2016: Abdominal Radiology
https://www.readbyqxmd.com/read/27854032/haustral-loop-extraction-for-ct-colonography-using-geodesics
#19
Yongkai Liu, Chaijie Duan, Jerome Liang, Jing Hu, Hongbing Lu, Mingyue Luo
PURPOSE: The human colon has complex geometric structures because of its haustral folds, which are thin flat protrusions on the colon wall. The haustral loop is the curve (approximately triangular in shape) that encircles the highly convex region of the haustral fold, and is regarded as the natural landmark of the colon, intersecting the longitude of the colon in the middle. Haustral loop extraction can assist in reducing the structural complexity of the colon, and the loops can also serve as anatomic markers for computed tomographic colonography (CTC)...
November 16, 2016: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/27814436/national-survey-of-ct-colonography-practice-in-ireland
#20
A E Smyth, C F Healy, E A Aherne, P MacMathuna, M M Morrin, H M Fenlon
CT Colonography was first introduced to Ireland in 1999. Our aim of this study is to review current CT Colonography practices in the Republic of Ireland. A questionnaire on CT Colonography practice was sent to all non-maternity adult radiology departments in the Republic of Ireland with a CT scanner. The results are interpreted in the context of the recommendations on CT Colonography quality standards as published by the European Society of Gastrointestinal and Abdominal Radiology (ESGAR) consensus statement in the journal of European Radiology in 2013...
June 10, 2016: Irish Medical Journal
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