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https://www.readbyqxmd.com/read/28390559/optimal-timing-for-faecal-tagging-in-same-day-ct-colonography-for-patients-with-failed-colonoscopy
#1
Sushant Saluja, Grazvydas Gaikstas, Milan Sapundzieski
AIM: Same day CT colonography (CTC) for incomplete colonoscopy should be considered to avoid the need for further bowel preparation. Oral administration of contrast is essential for optimal colonic analysis of the CTC. Our aim was to determine the optimal time for giving contrast to people who underwent same day CTC after failed colonoscopy. METHODS: Data was extracted from the Trust database to identify the number of CTC referrals following failed or incomplete colonoscopy within the last 5 years, and the reason for their referral...
May 2017: Radiography
https://www.readbyqxmd.com/read/28379020/-contribution-of-ct-colonography-to-clinical-practice
#2
Lukáš Lambert, Lucie Šimáková
CT colonography is a CT examination focused on the detection of colonic polyps and masses. Its most common indications include incomplete optical colonoscopy and generally personal preference in symptomatic or frail patients. CT colonography has a diagnostic yield similar to optical colonoscopy. It is less demanding for the patient, has shorter examination times, lower rates of adverse effects (including bowel perforation) and allows limited evaluation of extracolonic structures. In 10-15 % of asymptomatic patients, optical colonoscopy is needed if either a colonic polyp or mass is detected...
2017: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/28356203/variation-in-patients-travel-times-among-imaging-examination-types-at-a-large-academic-health-system
#3
Andrew B Rosenkrantz, Yu Liang, Richard Duszak, Michael P Recht
RATIONALE AND OBJECTIVES: Patients' willingness to travel farther distances for certain imaging services may reflect their perceptions of the degree of differentiation of such services. We compare patients' travel times for a range of imaging examinations performed across a large academic health system. MATERIALS AND METHODS: We searched the NYU Langone Medical Center Enterprise Data Warehouse to identify 442,990 adult outpatient imaging examinations performed over a recent 3...
March 27, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28333541/extracolonic-findings-at-screening-ct-colonography-prevalence-benefits-challenges-and-opportunities
#4
B Dustin Pooler, David H Kim, Perry J Pickhardt
OBJECTIVE: Extracolonic findings at screening CT colonography (CTC) represent imaging findings incidentally detected outside the colon and rectum. Confusion regarding rates reported in the literature fuels controversy over the relative benefits versus harms of extracolonic findings. CONCLUSION: From an evidence-based approach, this article reviews the prevalence and benefits of and challenges raised by extracolonic findings, as well as opportunities to further leverage the effect of screening CTC...
March 23, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28281908/increasing-navigation-speed-at-endoluminal-ct-colonography-reduces-colonic-visualization-and-polyp-identification
#5
Andrew A Plumb, Peter Phillips, Graeme Spence, Susan Mallett, Stuart A Taylor, Steve Halligan, Thomas Fanshawe
Purpose To investigate the effect of increasing navigation speed on the visual search and decision making during polyp identification for computed tomography (CT) colonography Materials and Methods Institutional review board permission was obtained to use deidentified CT colonography data for this prospective reader study. After obtaining informed consent from the readers, 12 CT colonography fly-through examinations that depicted eight polyps were presented at four different fixed navigation speeds to 23 radiologists...
March 10, 2017: Radiology
https://www.readbyqxmd.com/read/28270290/application-of-low-tube-voltage-70-kv-and-advanced-modeled-iterative-reconstruction-in-the-third-generation-dual-source-ct-to-ct-colonography
#6
Jingjuan Liu, Weidong Pan, Huadan Xue, Bin Li, Xuan Wang, Hao Sun, Yun Wang, Wei Liu, Zhengyu Jin
Objective To explore the feasibility of reducing radiation dose of CT colonography (CTC) while preserving image quality using the third-generation dual-source CT at 70 kV tube voltage with advanced modeled iterative reconstruction (ADMIRE). Methods This prospective study consecutively included 53 patients. All patients underwent CTC at 120 kV in supine position with filtered back projection reconstruction and at 70 kV in prone position with ADMIRE with the same scan range. Radiation dose and image quality were compared between these two protocols...
February 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/28256902/the-role-of-colonoscopy-and-ct-colonography-in-patients-presenting-with-symptoms-of-constipation
#7
Kumaran Ratnasingham, Tammy Lo, Karim Jamal, Lavanya Varatharajan, Yasmin Tabbakh, Hussein Kaderbhai, Nicholas J West
OBJECTIVES: There is controversy whether constipation as a primary presenting complaint is an indication for diagnostic colonoscopy. Computed tomographic colonography (CTC) is a less invasive and more acceptable alternative. We compared the completion and sensitivity of colonoscopy with CTC in patients who presented with the primary symptom of constipation. METHOD: A retrospective study was conducted which examined the first 100 colonoscopies and 100 CTCs carried out for the primary symptom of constipation from June 2012 to December 2013...
March 3, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28243050/appendiceal-mucocele-due-to-mucinous-adenoma-diagnosed-by-computed-tomography-colonography
#8
Nicola Flor, Gianpaolo Carrafiello
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/28222812/prevalence-and-risk-factors-for-post-investigation-colorectal-cancer-interval-cancer-after-computed-tomographic-colonography-protocol-for-a-systematic-review
#9
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
#10
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
#11
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...
March 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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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...
January 1, 2017: 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
#19
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
#20
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
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