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Colonography

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https://www.readbyqxmd.com/read/29040021/flexible-sigmoidoscopy-and-ct-colonography-screening-patients-experience-with-and-factors-for-undergoing-screening-insight-from-the-proteus-colon-trial
#1
Carlo Senore, Loredana Correale, Daniele Regge, Cesare Hassan, Gabriella Iussich, Marco Silvani, Arrigo Arrigoni, Lia Morra, Nereo Segnan
Purpose To compare the acceptability of computed tomographic (CT) colonography and flexible sigmoidoscopy (FS) screening and the factors predicting CT colonographic screening participation, targeting participants in a randomized screening trial. Materials and Methods Eligible individuals aged 58 years (n = 1984) living in Turin, Italy, were randomly assigned to be invited to screening for colorectal cancer with FS or CT colonography. After individuals who had died or moved away (n = 28) were excluded, 264 of 976 (27...
October 17, 2017: Radiology
https://www.readbyqxmd.com/read/28991559/imaging-and-screening-for-colorectal-cancer-with-ct-colonography
#2
REVIEW
Perry J Pickhardt
Despite being readily preventable, colorectal cancer ranks second behind only lung cancer in overall mortality. However, this situation could be reversed if screening tests that effectively detect advanced adenomas and early cancers were broadly applied. Computed tomographic colonography (CTC) reflects an ideal balance of minimal invasiveness with high-level performance, assuming all facets of the examination are appropriately addressed. Unfortunately, this promising screening test remains grossly underused...
November 2017: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/28991080/prospective-trial-evaluating-the-surgical-anastomosis-at-one-year-colorectal-cancer-surveillance-ct-colonography-versus-optical-colonoscopy-and-implications-for-patient-care
#3
MULTICENTER STUDY
Perry J Pickhardt, Kristin Edwards, David H Bruining, Marc Gollub, Sonja Kupfer, Sam J Lubner, David H Kim, Eric Ross, Eileen Keenan, David S Weinberg
OBJECTIVE: The aim of this study was to compare the accuracy of CT colonography versus optical colonoscopy for neoplastic involvement at the surgical anastomosis 1 year after curative-intent colorectal cancer resection. DESIGN, SETTING, PATIENTS, AND INTERVENTIONS: Two hundred one patients (mean age, 58.6 years; 117 men, 84 women) underwent same-day contrast-enhanced CT colonography and colonoscopy approximately 1 year (mean, 12.1 months; median, 11.9 months) after colorectal cancer resection as part of a prospective, multicenter trial...
November 2017: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/28988790/recent-diagnostic-procedures-for-colorectal-cancer-screening-are-they-cost-effective
#4
REVIEW
Mostafa Ahmed Arafa, Karim Hamda Farhat
Colorectal cancer (CRC) is the third most common cancer worldwide and the fourth most common cause of death. Reduction in mortality rates in some countries worldwide are most likely ascribed to CRC screening and/or improved treatments. We reviewed the most relevant articles which discuss the cost-effectiveness of colorectal cancer screening procedures, in particular, the recent ones through the last eight years. The effectiveness of screening estimated by discounted life years gained (LYGs) compared to no screening, differed considerably between the studies...
October 4, 2017: Arab Journal of Gastroenterology: the Official Publication of the Pan-Arab Association of Gastroenterology
https://www.readbyqxmd.com/read/28972802/trends-in-ct-colonography-bibliometric-analysis-of-the-100-most-cited-articles
#5
Mohammed Fahim Mohammed, Tejbir Chahal, Bo Gong, Nizar Bhulani, Michael O'Keefe, Timothy O'Connell, Savvas Nicolaou, Faisal Khosa
PURPOSE: To identify the top 100 cited articles, which focused on CT colonography. The top 100 articles could then be analyzed to get an idea of which factors resulted in highly cited works, and to establish trends in CTC research. MATERIALS AND METHODS: Web of Science search was used to create a database of scientific journals using our search terms. A total of 10597 articles were returned from this search. Articles were included if they focused on diagnostic imaging, imaging technique, cost effectiveness analysis, clinical use, patient preference or trends in CTC...
October 3, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28965706/preoperative-segmental-localization-of-colorectal-carcinoma-ct-colonography-vs-optical-colonoscopy
#6
T Offermans, F J Vogelaar, M Aquarius, M L G Janssen-Heijnen, P C G Simons
BACKGROUND: Adequate preoperative segmental localization of colorectal cancer is important to indicate the right surgical treatment. Preoperative localization has become more important in the era of minimally invasive surgery. The aim of this study was to compare optical colonoscopy (OC) and CT colonography (CTC) with respect to the error rates in the segmental localization of colorectal carcinoma. METHODS: A total of 420 patients with histopathologically proven colorectal carcinoma underwent CTC between December 2006 and February 2017...
September 20, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28870147/electronic-cleansing-in-computed-tomography-colonography-using-at-layer-identification-with-integration-of-gradient-directional-second-derivative-and-material-fraction-model
#7
Krisorn Chunhapongpipat, Ratinan Boonklurb, Bundit Chaopathomkul, Sirod Sirisup, Rajalida Lipikorn
BACKGROUND: In computed tomography colonography images, electronic cleansing (EC) is applied to remove opacified residual materials, called fecal-tagging materials (FTM), using positive-contrast tagging agents and laxative to facilitate polyp detection. METHODS: The proposed EC, EC prop , integrates the gradient directional second derivative into material fraction model to preserve submerged soft tissue (ST) under FTM. Three-material fraction model is used to remove FTM and artifacts at air-tagging (AT) layers and T-junctions where air, ST, and FTM material meet simultaneously...
September 4, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28839947/dynamic-chronic-rectal-obstruction-causing-a-severe-colonic-dilatation-in-a-cat
#8
Sofia García-Pertierra, Esteban Gonzàlez-Gasch, Carmen Catalá Puyol, Jose María Closa Boixeda
CASE SUMMARY: A 5-year-old male neutered domestic shorthair cat was presented to our referral centre with a 13 month history of chronic tenesmus due to malunion of the right caudal iliac body. Constipation and pelvic canal stenosis were initially addressed by the referring veterinarian with a right femoral head and neck excision and a right acetabulectomy without observable clinical improvement. At admission, abdominal radiographs revealed severe colonic distension and a narrowed pelvic canal caused by the right proximal femur...
July 2017: JFMS open reports
https://www.readbyqxmd.com/read/28814206/computed-tomography-colonography-underutilised-in-australia
#9
Richard M Mendelson, Tom Sutherland, Andrew Little
No abstract text is available yet for this article.
August 21, 2017: Medical Journal of Australia
https://www.readbyqxmd.com/read/28812132/bowel-preparation-in-ct-colonography-is-diet-restriction-necessary-a-randomised-trial-dietsan
#10
Davide Bellini, Domenico De Santis, Damiano Caruso, Marco Rengo, Riccardo Ferrari, Tommaso Biondi, Andrea Laghi
OBJECTIVES: To investigate whether diet restriction affects quality of colon cleansing and patient tolerance during reduced bowel preparation for CT colonography (CTC). METHODS: Asymptomatic and symptomatic patients were enrolled in this pragmatic, single-centre, randomised trial. All patients were randomly assigned (1:1 ratio, blocks of ten) to receive a reduced bowel preparation and faecal tagging with (Diet-Restriction-Group [DR]) or without (No-Diet-Restriction-Group [NDR]) dietary restriction...
August 10, 2017: European Radiology
https://www.readbyqxmd.com/read/28753031/computer-aided-detection-of-colorectal-polyps-at-ct-colonography-prospective-clinical-performance-and-third-party-reimbursement
#11
Timothy J Ziemlewicz, David H Kim, J Louis Hinshaw, Meghan G Lubner, Jessica B Robbins, Perry J Pickhardt
OBJECTIVE: We assessed the initial clinical performance and third-party reimbursement rates of supplementary computer-aided detection (CAD) at CT colonography (CTC) for detecting colorectal polyps 6 mm or larger in routine clinical practice. MATERIALS AND METHODS: We retrospectively assessed the prospective clinical performance of a U.S. Food and Drug Administration-approved CAD system in second-reader mode in 347 consecutive adults (mean age, 57.6 years; 205 women, 142 men) undergoing CTC evaluation over a 5-month period...
June 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28734142/differences-between-genders-in-colorectal-morphology-on-ct-colonography-using-a-quantitative-approach-a-pilot-study
#12
Charles N Weber, Jason A Poff, Anna S Lev-Toaff, Marc S Levine, Hanna M Zafar
PURPOSE: To explore quantitative differences between genders in morphologic colonic metrics and determine metric reproducibility. METHODS: Quantitative colonic metrics from 20 male and 20 female CTC datasets were evaluated twice by two readers; all exams were performed after incomplete optical colonoscopy. Intra-/inter-reader reliability was measured with intraclass correlation coefficient (ICC) and concordance correlation coefficient (CCC). RESULTS: Women had overall decreased colonic volume, increased tortuosity and compactness and lower sigmoid apex height on CTC compared to men (p<0...
July 15, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28724866/effect-of-reduced-tube-voltage-on-diagnostic-accuracy-of-ct-colonography
#13
Yoshihiro Futamata, Tomoaki Koide, Riku Ihara
The normal tube voltage in computed tomography colonography (CTC) is 120 kV. Some reports indicate that the use of a low tube voltage (lower than 120 kV) technique plays a significant role in reduction of radiation dose. However, to determine whether a lower tube voltage can reduce radiation dose without compromising diagnostic accuracy, an evaluation of images that are obtained while maintaining the volume CT dose index (CTDIvol) is required. This study investigated the effect of reduced tube voltage in CTC, without modifying radiation dose (i...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28702886/comparison-of-transvaginal-sonography-and-computed-tomography-colonography-with-contrast-media-and-urographic-phase-for-diagnosing-deep-infiltrating-endometriosis-of-the-posterior-compartment-of-the-pelvis-a-pilot-study
#14
Letizia Zannoni, Simona Del Forno, Francesca Coppola, Dimitris Papadopoulos, Domenico Valerio, Rita Golfieri, Giacomo Caprara, Roberto Paradisi, Renato Seracchioli
PURPOSE: To compare the diagnostic accuracy of transvaginal sonography (TVS) and computed tomography-colonography with contrast media and urographic phase (CTCU) in the preoperative detection of deep infiltrating endometriosis (DIE). MATERIALS AND METHODS: Forty-seven patients with clinical suspicion of DIE underwent preoperative TVS and CTCU. Imaging data were compared with histopathologic analysis. Sensitivity, specificity, positive and negative predictive values and test accuracies of the two modalities were calculated...
July 12, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28696184/insurance-coverage-for-ct-colonography-screening-impact-on-overall-colorectal-cancer-screening-rates
#15
Maureen A Smith, Jennifer M Weiss, Aaron Potvien, Jessica R Schumacher, Ronald E Gangnon, David H Kim, Lauren A Weeth-Feinstein, Perry J Pickhardt
Purpose To compare overall colorectal cancer (CRC) screening rates for patients who were eligible and due for CRC screening and who were with and without insurance coverage for computed tomographic (CT) colonography for CRC screening. Materials and Methods The institutional review board approved this retrospective cohort study, with a waiver of consent. This study used longitudinal electronic health record data from 2005 through 2010 for patients managed by one of the largest multispecialty physician groups in the United States...
September 2017: Radiology
https://www.readbyqxmd.com/read/28689518/colon-cancer-screening-is-it-time-yet
#16
EDITORIAL
Hadi Bhurgri, Sami Samiullah
The month of March is dedicated to Colon Cancer Awareness. Worldwide, colorectal cancer (CRC) incidence has been on the rise. It is currently the third most common cancer in men (746,000 cases, 10.0% of the total) and the second in women (614,000 cases, 9.2% of the total).1 Arecent meta-analysis reported a 61% risk reduction in CRC incidence with colonoscopy.2 Unlike screening programs for breast and prostate cancers, not only has CRC screening reduced mortality from colon cancer and detected early CRC, it has also decreased the incidence of CRC through detection and removal of pre-cancerous lesions...
June 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28684185/transabdominal-ultrasound-colonography-for-detection-of-colorectal-neoplasms-initial-clinical-experience
#17
Jin-Ya Liu, Li-Da Chen, Jian-Bo Xu, Hui Wu, Jin-Ning Ye, Xin-Hua Zhang, Xiao-Yan Xie, Wei Wang, Ming-De Lu
We investigated the feasibility of using ultrasound colonography (USC) to visualize the healthy colon and rectum and detect colorectal polyps. Eight healthy volunteers underwent USC after standard bowel preparation. The feasibility and image quality of USC in different segments were evaluated. Then, USC was conducted on eight patients with known colonic neoplasms using colonoscopy as the reference standard. For volunteers, USC examinations were successfully performed on four (50.0%) ascending, three (37.5%) transverse and eight (100%) descending colons, as well as all sigmoid colons and rectums...
July 3, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28681075/cost-analysis-of-colorectal-cancer-screening-with-ct-colonography-in-italy
#18
Paola Mantellini, Giuseppe Lippi, Lapo Sali, Grazia Grazzini, Silvia Delsanto, Beatrice Mallardi, Massimo Falchini, Guido Castiglione, Francesca Maria Carozzi, Mario Mascalchi, Stefano Milani, Leonardo Ventura, Marco Zappa
OBJECTIVE: Unit costs of screening CT colonography (CTC) can be useful for cost-effectiveness analyses and for health care decision-making. We evaluated the unit costs of CTC as a primary screening test for colorectal cancer in the setting of a randomized trial in Italy. METHODS: Data were collected within the randomized SAVE trial. Subjects were invited to screening CTC by mail and requested to have a pre-examination consultation. CTCs were performed with 64- and 128-slice CT scanners after reduced or full bowel preparation...
July 5, 2017: European Journal of Health Economics: HEPAC: Health Economics in Prevention and Care
https://www.readbyqxmd.com/read/28674967/adverse-events-during-ct-colonography-for-screening-diagnosis-and-preoperative-staging-of-colorectal-cancer-a-japanese-national-survey
#19
Koichi Nagata, Ken Takabayashi, Takaaki Yasuda, Michiaki Hirayama, Shungo Endo, Ryoichi Nozaki, Takenobu Shimada, Hidenori Kanazawa, Masanori Fujiwara, Norihito Shimizu, Tatema Iwatsuki, Teruaki Iwano, Hiroshi Saito
OBJECTIVES: To retrospectively evaluate the frequencies and magnitudes of adverse events associated with computed tomographic colonography (CTC) for screening, diagnosis and preoperative staging of colorectal cancer. METHODS: A Japanese national survey on CTC was administered by use of an online survey tool in the form of a questionnaire. The questions covered mortality, colorectal perforation, vasovagal reaction, total number of examinations, and examination procedures...
July 3, 2017: European Radiology
https://www.readbyqxmd.com/read/28647989/-accuracy-of-ct-colonography-for-the-detection-of-colorectal-neoplasm-a-subgroup-meta-analysis
#20
REVIEW
H H Yu, H Y Huang, Y S Jiang, C Zhu, C G Guo, M Dai, X J Xing, J F Shi
Objective: To assess the accuracy of computed tomographic colonography (CTC) for detection of colorectal neoplasm. Methods: Publications prior to January 2016 from the Medline, Embase, CNKI, WANFANG, and VIP literature databases were systematically reviewed. A QUADAS checklist was used to assess the quality of the studies. According to the sizes of tumor (≥6 mm or ≥10 mm), diagnostic test accuracy indexes (area under the curve, sensitivity and specific) were pooled and stratified. Spearman correlation and curve of summary receiver operating characteristic (SROC) were applied to comprehensively assess the threshold effect...
June 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
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