• The use of computed tomography colonography or virtual colonography (VC) is gaining acceptance as a screening modality for colon cancer . (omicsonline.org)
  • Evidence Review and Status Update on Computed Tomography Colonography. (gbdiagnostic.com)
  • Scholars@Duke publication: Colorectal polyps: detection with low-dose multi-detector row helical CT colonography versus two sequential colonoscopies. (duke.edu)
  • PURPOSE: To prospectively evaluate the diagnostic accuracy of low-radiation-dose computed tomographic (CT) colonography for detection of colorectal polyps by using two sequential colonoscopies, with the second colonoscopy as the reference standard. (duke.edu)
  • Sensitivities for detection of polyps 6 mm in diameter or larger were 86% and 84% for CT colonography and initial colonoscopy, respectively. (duke.edu)
  • Initial colonoscopy failed to depict 16 polyps, six of which were correctly detected with CT colonography. (duke.edu)
  • CONCLUSION: Low-dose CT colonography compares favorably with colonoscopy for detection of colorectal polyps 6 mm in diameter or larger, with markedly decreased performance for detection of polyps 5 mm in diameter or smaller. (duke.edu)
  • 6 CT colonography is a relatively new procedure for viewing the colon and large intestine to check for polyps and cancer, and is far less invasive, and far less dangerous, than traditional colonoscopy. (nationalcenter.org)
  • CT and magnetic resonance (MR) colonography (virtual colonoscopy) techniques are being developed for the imaging of colorectal polyps and cancer. (medscape.com)
  • It is believed to be driven by changes in risk factors, early detection of cancer through CRC screening, and removal of precancerous polyps with colonoscopy, in addition to advances in surgical and treatment approaches. (lww.com)
  • CONCLUSION: CT colonography has excellent sensitivity for the detection of clinically important colorectal polyps and cancer. (elsevierpure.com)
  • We review recent literature bearing on this assumption, emphasizing the benefits and limitations of colonoscopy for screening and surveillance of polyps. (mssm.edu)
  • The goals of perioperative clearing colonoscopy are detection of synchronous cancer and detection and complete resection of precancerous polyps. (blogspot.com)
  • If neoplastic polyps are detected, the intervals between colonoscopies should be in accordance with published guidelines for polyp surveillance intervals. (blogspot.com)
  • Endoscopy Nurse Participation May Increase the Polyp Detection Rate by Second-Year Fellows during Screening Colonoscopies. (kbsmc.co.kr)
  • Harms associated with CT colonography include radiation-induced effects, the downstream effects from detection of extracolonic findings, and the potential harms of follow-up colonoscopy. (kolorektum.cz)
  • Diagnostic imaging by CT colonography and colon capsule endoscopy have been proposed as alternatives to optical colonoscopy for the detection of colonic neoplasia. (bmj.com)
  • Colonoscopy is the gold standard for screening because it allows for both detection and excision of premalignant lesions. (medscape.com)
  • To prospectively compare the accuracy of computed tomographic (CT) and magnetic resonance (MR) enterography and small-bowel follow-through (SBFT) examination for detection of active small-bowel inflammation and extraenteric complications in patients with Crohn disease (CD). (rsna.org)
  • PURPOSE: To determine the sensitivity and specificity of computed tomographic (CT) colonography for colorectal polyp and cancer detection by using colonoscopy as the reference standard. (elsevierpure.com)
  • RESULTS: The overall sensitivity and specificity of CT colonography for polyp detection were 90.1% (164 of 182) and 72.0% (85 of 118), respectively. (elsevierpure.com)
  • A 79-year-old patient underwent a VC after a failed screening optical colonoscopy (OC). (omicsonline.org)
  • The patient underwent repair of the hernia, sigmoid resection for sigmoid perforation, followed by intra-operative colonoscopy (which confirmed the radiographic findings of a cecal lesion) and right colectomy. (omicsonline.org)
  • RESULTS: Eighty-eight patients underwent CT colonography and initial conventional colonoscopy on the same day. (duke.edu)
  • MATERIALS AND METHODS: Three hundred patients underwent CT colonography followed by Standard Colonoscopy. (elsevierpure.com)
  • In this study, 230 of 560 patients at 11 Italian hospitals who did not have a low pretest probability of PE by the Wells rule and negative D-dimer assay underwent computed tomographic pulmonary angiography (CTPA) or ventilation-perfusion lung scans. (blogspot.com)
  • The USPSTF concludes that the evidence is insufficient to assess the benefits and harms of computed tomographic colonography and fecal DNA testing as screening modalities for colorectal cancer. (nih.gov)
  • Harms related to stool-based tests are limited to the psychological harms of screening in general, and the potential harms of follow-up colonoscopy. (kolorektum.cz)
  • Overall, there is sufficient evidence that the benefits outweigh the harms both for sigmoidoscopy and for colonoscopy. (kolorektum.cz)
  • PURPOSE: To use perspective volume rendering (PVR) of computed tomographic (CT) and magnetic resonance (MR) imaging data sets to simulate endoscopic views of human organ systems. (rsna.org)
  • An international group of 23 experts convened by IARC performed a systematic review and evaluation of the pertinent scientific literature on stool-based tests, endoscopic methods, and computed tomographic colonography methods. (kolorektum.cz)
  • Endoscopic methods, which use optical approaches to directly examine the colon and rectum, include sigmoidoscopy and colonoscopy. (kolorektum.cz)
  • Both CT and MR colonography allow an analysis in both the cross-sectional and virtual endoscopic formats. (medscape.com)
  • Endoscopic evaluation with flexible sigmoidoscopy every five years in combination with stool testing, or colonoscopy every 10 years are all acceptable options. (uwi.edu)
  • A scan that offers patients a less invasive test, sometimes called a 'virtual colonoscopy' , is more effective than the traditional X-ray test of barium enema and should now be considered alongside the 'gold standard' of colonoscopy for investigating patients with a possible bowel cancer. (cancerresearchuk.org)
  • Professor Jane Wardle, based at UCL, who led studies looking into patient experiences of the three tests, said: "We have shown that people prefer CTC to both barium enema and colonoscopy. (cancerresearchuk.org)
  • There are several colorectal screening options for average-risk individuals, including colonoscopy every 10 years, flexible sigmoidoscopy every 5 years, double-contrast barium enema every 5 years, CT colonography every 5 years, and annual fecal occult blood testing. (medscape.com)
  • At present, this approach cannot replace a barium enema study or colonoscopy . (medscape.com)
  • Patient acceptability of CT colonography compared with double contrast barium enema: results from a multicentre randomised controlled trial of symptomatic patients. (ox.ac.uk)
  • OBJECTIVES: To determine patient acceptability of barium enema (BE) or CT colonography (CTC). (ox.ac.uk)
  • With these in place, we have shown that CTC offers a viable option for people who are not able to or do not wish to undergo a colonoscopy for whatever reason. (cancerresearchuk.org)
  • In addition some elderly patients are too frail to undergo the laxative preparation for conventional colonoscopy 3 . (imj.ie)
  • Previous studies showed that 25% of Medicare recipients undergo repeat screening colonoscopies sooner than necessary , but the Centers of Disease Control and Prevention recently reported that nearly 4 in 10 adults between ages 50 and 75 are not up-to-date on colorectal cancer screening. (blogspot.com)
  • The Task Force recommends that patients with colorectal cancer (CRC) undergo high-quality perioperative clearing with colonoscopy. (blogspot.com)
  • Similarly, it was not known how many patients needed a follow-up test after colonoscopy because the scope could not pass around the bowel. (cancerresearchuk.org)
  • CTC works by taking hundreds of x-ray "slices" through the body which are then processed by a computer to create a 'virtual' 3D image of the inside of the bowel, similar to what is seen during colonoscopy. (cancerresearchuk.org)
  • However, it is unlikely to take the place of colonoscopy in bowel screening. (imj.ie)
  • In the context of the bowel screening programme in Ireland, CT colonography is recommended as the completion test of screening in certain clinical scenarios. (imj.ie)
  • The development of regional chosen centres for the provision of CT Colonography as part of the National Bowel screening programme in Ireland may be a way to ensure consistency of the procedure and prevent varying local practices, similar to how there are 15 chosen Colonoscopy centres as part of the same programme. (imj.ie)
  • Title: Budget-impact model for colonoscopy cost calculation and comparison between 2 litre PEG+ASC and sodium picosulphate with magnesium citrate or sodium phosphate oral bowel cleansing agents. (aablocks.com)
  • Turner J, Page M, Clark C, Khanduja K (2016) Sigmoid Perforation during CT Colonography in a Patient with an Inguinal Hernia and Concomitant Finding of a Right-Sided Colon Cancer. (omicsonline.org)
  • We report a case of colon perforation in a patient where a colon cancer was diagnosed using VC colonography with manual insufflation. (omicsonline.org)
  • CT colonography also referred to as virtual colonoscopy (VC) was first described in 1994 [ 1 ] and its use as a screening modality for colon cancer is controversial. (omicsonline.org)
  • But the researchers, funded by the National Institute for Health Research Health Technology Assessment and Cancer Research UK 1 , caution that guidelines are needed before this type of scan, also called CT colonography (CTC), is used more widely because its ability to detect relatively unimportant findings can result in patients being referred for unnecessary follow-up tests. (cancerresearchuk.org)
  • Unlike colonoscopy, samples of tissue cannot be taken at CTC and it was not known how many patients needed a follow-up test to either confirm a suspected cancer or to rule out other findings found in the scan. (cancerresearchuk.org)
  • The USPSTF recommends screening for colorectal cancer using fecal occult blood testing, sigmoidoscopy, or colonoscopy in adults, beginning at age 50 years and continuing until age 75 years. (nih.gov)
  • The USPSTF recommends against routine screening for colorectal cancer in adults 76 to 85 years of age. (nih.gov)
  • The USPSTF recommends against screening for colorectal cancer in adults older than age 85 years. (nih.gov)
  • The life-saving potential of widespread CT colonography use is staggering: According to The National Cancer Institute Colorectal Cancer Progress Review Group, wider availability of screening procedures like CT colonography could save as many as 20,000 lives per year. (nationalcenter.org)
  • Is gynecological cancer a new indication for surveillance colonoscopy in Korea? (kbsmc.co.kr)
  • There is sufficient evidence that screening every 1 or 2 years with gFOBT (either with or without rehydration), when the test is coupled with follow-up colonoscopy for those testing positive, reduces colorectal cancer mortality. (kolorektum.cz)
  • There is sufficient evidence that a single screening with sigmoidoscopy or with colonoscopy reduces both the incidence of and the mortality from colorectal cancer. (kolorektum.cz)
  • CT colonography, an imaging method based on scanning technology, has been developed as a less invasive visualization technique for colorectal cancer screening. (kolorektum.cz)
  • There is limited evidence that a single screening with CT colonography reduces colorectal cancer incidence and/or mortality. (kolorektum.cz)
  • Computed tomographic colonography (CTC) for colon cancer screening]. (aihta.at)
  • Regular screening with a stool test, sigmoidoscopy, or colonoscopy, beginning at age 45, is the key to preventing colorectal cancer and finding it early. (health.mil)
  • CT Colongraphy has evolved in recent years and its role in colorectal cancer screening has become more defined with some of the emerging guidelines available including the guidelines for Use of CT Colonography as part of the National Colorectal Screening Programme in Ireland. (imj.ie)
  • CT colonoscopy is not suitable as a first line investigation for screening those with an increased risk of colorectal cancer such as those with a positive first-degree family history of colorectal cancer 3 . (imj.ie)
  • Colonoscopy revealed a 2/3 circumscribed type 2 tumor ( Fig. 1A ) in the ascending colon that was diagnosed as colorectal cancer following biopsy. (spandidos-publications.com)
  • For patients with a family history of colorectal cancer or advanced adenoma that was diagnosed before age 60 years in one first-degree relative or at any age in two first-degree relatives, testing should begin with colonoscopy at an age10 years younger than the youngest age at diagnosis of a first-degree relative, or age 40, to be repeated every 5 years. (medscape.com)
  • In: Cash, B. (Ed.), Colorectal Cancer Screening and Computerized Tomographic Colonography: A Comprehensive Overview (pp 41-58). (gbdiagnostic.com)
  • CIENCIASMEDICASNEWS: Colonoscopy surveillance after colorectal cancer resection: recommendations of the U.S. Multi-Society Task Force on Colorectal Cancer. (blogspot.com)
  • The Task Force recommends that patients who have undergone curative resection of either colon or rectal cancer receive their first surveillance colonoscopy 1 year after surgery (or 1 year after the clearing perioperative colonoscopy). (blogspot.com)
  • An abdominal X-ray and subsequent computed tomographic scan showed a severely distended cecum of 9cm with stenosis in the sigmoid. (biomedcentral.com)
  • Computed tomography was originally known as the "EMI scan" as it was developed at a research branch of EMI , a company best known today for its music and recording business. (wikidoc.org)
  • It was later known as computed axial tomography (CAT or CT scan) and body section roentgenography . (wikidoc.org)
  • It is an evolving radiological study that, is considered a safe alternative to screening optical colonoscopy (OC). (omicsonline.org)
  • According to Peter J. Neumann, Sc.D., and Sean R. Tunis, M.D. writing on the New England Journal of Medicine website, the Center For Medicare Services (CMS) determined that "clinical trials showing a benefit of screening with CT colonography were not necessarily generalizable, because the mean age of trial participants was lower than that of Medicare patients. (nationalcenter.org)
  • Secondary outcome measures are the effect of the addition of a collection paper on the participation rate, reasons for participation and non-participation, measures of informed choice and psychological consequences of screening and measures of psychological and physical burden associated with the iFOBt and the colonoscopy. (biomedcentral.com)
  • Colonoscopy is used both as a primary screening tool and as follow-up for individuals testing positive with other screening methods. (kolorektum.cz)
  • Part 3: Status of screening-activities and quality assurance of screening-colonoscopy. (aihta.at)
  • We also provide recommendations on the role of aspirin for chemoprevention, quality indicators for colonoscopy, approaches to organized CRC screening and improving adherence to CRC screening. (lww.com)
  • This can be accomplished by achieving high rates of adherence, quality monitoring and improvement, following evidence-based guidelines, and removing barriers through the spectrum of care from noninvasive screening tests to screening and diagnostic colonoscopy. (lww.com)
  • The new DHA guidelines also offer various CRC screening options, including expanding the use of a stool-based test known as Fecal Immunochemical Test, or FIT, as an alternative to a colonoscopy. (health.mil)
  • The outcome was the clinic status (highest quartile [Q4] vs lowest quartile [Q1]), which was based on the absolute screening rate change between the first and second program years. (cdc.gov)
  • In these situations, CT Colonography can be used as an alternative screening method. (imj.ie)
  • By educating patients and providers about evidence-based alternatives to colonoscopy such as FIT, we are striving to expand access to screening to as many patients as we possibly can," said U.S. Navy Lt. Brett Sadowski, program director of gastroenterology fellowship at the Navy Medicine Readiness and Training Command in San Diego. (health.mil)
  • Colonoscopy screening should be discontinued in patients aged 75 or older with prior negative screening tests or whose life expectancy is less than 10 years, or in those 85 years or older without prior screening. (medscape.com)
  • We recommend that screening should start at age 45 for the average risk patient and may take the form of yearly stool testing (three serial samples) followed by colonoscopy where positive. (uwi.edu)
  • The physicians at Atlantic Digestive Specialists have saved thousands of lives by thoroughly screening adults age 50 and over with colonoscopies. (atlanticdigestive.com)
  • In an editorial in the May 15th issue of American Family Physician , I and Dr. Jennifer Frost explained why the American Academy of Family Physicians disagreed with the new recommendations, and instead chose not to recommend CT colonography or fecal DNA testing and to also reaffirm its previous stance against screening adults older than 85 years. (blogspot.com)
  • Initial conventional colonoscopy was performed by an endoscopist unaware of the CT colonographic findings. (duke.edu)
  • It carries a lower risk of perforating the colon than conventional colonoscopy and it is less likely to exacerbate existing heath problems, such as the chronic breathing and heart conditions 9 which afflict many older Americans. (nationalcenter.org)
  • CT Colonography is a relatively new technique and there is varying local practice with regard to study technique and interpretation. (imj.ie)
  • Objective Diagnostic imaging by CT colonography and capsule endoscopy is used to detect colonic lesions. (bmj.com)
  • Referral rates for CT colonography are recommended to be less than 10 per cent of all those referred for colonoscopy following a positive fecal occult blood test 7 . (imj.ie)
  • X-ray (A) and computed tomographic scans (B, C) of the patient's abdomen show a significantly inflated cecum and an obstruction in the sigmoid colon with a proximal distension of the colon. (biomedcentral.com)
  • An abdominal X-ray (Figure 1 A) and subsequent abdominal computed tomography (CT) (Figure 1 B,C) showed a significantly inflated cecum of 9cm and an obstruction in the sigmoid colon with a proximal distension of the colon. (biomedcentral.com)
  • Subsequent colonoscopies should occur at 5-year intervals until the benefit of continued surveillance is outweighed by diminishing life expectancy. (blogspot.com)
  • The virtual pathology (VP), a display mode for interpretation of computed tomographic colonography (CTC), was discussed. (elsevierpure.com)
  • Reed, J & Johnson, CD 1998, ' Virtual pathology: A new paradigm for interpretation of computed tomographic colonography ', Proceedings of SPIE - The International Society for Optical Engineering , vol. 3335, pp. 439-449. (elsevierpure.com)
  • The sensitivities of CT colonography and initial colonoscopy were calculated on a per-polyp and a per-patient basis. (duke.edu)
  • Per-polyp sensitivities were 62% and 83% for CT colonography and initial colonoscopy, respectively. (duke.edu)
  • After initial colonoscopy, emergency surgery is the best therapeutic approach if there is a complete obstruction. (biomedcentral.com)
  • otherwise, these patients may be referred to a gastroenterologist for a full colonoscopy , as well as for therapeutic maneuvers such as polypectomy. (medscape.com)
  • In a second trial 3 almost 1,600 patients were given either a CTC or a colonoscopy. (cancerresearchuk.org)
  • In patients who had CTC, 30 per cent had a follow-up test compared with only eight per cent who had colonoscopy. (cancerresearchuk.org)
  • CTC is a less uncomfortable test and, unlike colonoscopy, patients do not need to be sedated. (cancerresearchuk.org)
  • The prevalence of GERD in patients with positive or negative laryngoscopy was similar (32.3% vs. 21.5%, p = 0.075). (bvsalud.org)
  • A colonoscopy can be offered for both average risk and high-risk patients. (health.mil)
  • In Europe, colonoscopy is mainly used to investigate faecal occult blood test positive or symptomatic patients, or as a preventive strategy in those with increased CRC risk 2 . (imj.ie)
  • Computed tomography (CT) colonography every five years is especially useful in some patients. (uwi.edu)
  • In patients with obstructive CRC precluding complete colonoscopy, the Task Force recommends CTC as the best alternative to exclude synchronous neoplasms. (blogspot.com)
  • Title: Comparison of patient acceptance of sodium phosphate versus polyethylene glycol plus sodium picosulfate for colon cleansing in Japanese. (aablocks.com)
  • External Clinical Validation of Prone and Supine CT Colonography Registration, Abdominal Imaging. (gbdiagnostic.com)
  • Computed tomography (CT) is a medical imaging method employing tomography . (wikidoc.org)
  • A novel approach to extract colon lumen from CT images for virtual colonoscopy , MedImg(19) , No. 12, December 2000, pp. 1220-1226. (visionbib.com)
  • Automatic centerline extraction for virtual colonoscopy , MedImg(21) , No. 12, December 2002, pp. 1450-1460. (visionbib.com)
  • This has led to stringent surveillance recommendations, with multiple guidelines recommending either annual or biennial colonoscopy. (medscape.com)
  • This was not discussed in the available Irish Guidelines with regard to cost effectiveness of CT Colonography. (imj.ie)
  • The availability CT Colonography as an alternative to colonoscopy (for the correct indications) appears to be growing in Ireland, with thirty centres around Ireland providing CT Colonography and over 51 consultants reading CT Colonography 6 . (imj.ie)
  • CT colonography has developed as an alternative or adjunct to colonoscopy but has not surpassed it in accuracy or therapeutic potential. (mssm.edu)
  • These complaints had been extensively analyzed several years earlier by the gastroenterology department, when no abnormalities were identified in blood tests or a colonoscopy. (biomedcentral.com)
  • The Task Force recommends that, after the 1-year colonoscopy, the interval to the next colonoscopy should be 3 years (i.e., 4 years after surgery or perioperative colonoscopy) and then 5 years (i.e., 9 years after surgery or perioperative colonoscopy). (blogspot.com)
  • Design Colonoscopies were classified on the basis of the largest lesion found. (bmj.com)
  • Second colonoscopy performed within 2 weeks by a colonoscopist aware of both the CT colonographic and the initial colonoscopic findings served as the reference standard. (duke.edu)
  • In fact, however, the elderly are among the most likely to benefit from CT colonography - and the most likely to favor this procedure. (nationalcenter.org)