A non-invasive imaging method that uses computed tomographic data combined with specialized imaging software to examine the colon.
Discrete tissue masses that protrude into the lumen of the COLON. These POLYPS are connected to the wall of the colon either by a stalk, pedunculus, or by a broad base.
Endoscopic examination, therapy or surgery of the luminal surface of the colon.
A versatile contrast medium used for DIAGNOSTIC X-RAY RADIOLOGY.
Agents that produce a soft formed stool, and relax and loosen the bowels, typically used over a protracted period, to relieve CONSTIPATION.
A solution or compound that is introduced into the RECTUM with the purpose of cleansing the COLON or for diagnostic procedures.
Agents that are used to stimulate evacuation of the bowels.
Computer systems or networks designed to provide radiographic interpretive information.
Tumors or cancer of the COLON or the RECTUM or both. Risk factors for colorectal cancer include chronic ULCERATIVE COLITIS; FAMILIAL POLYPOSIS COLI; exposure to ASBESTOS; and irradiation of the CERVIX UTERI.
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
The act of blowing a powder, vapor, or gas into any body cavity for experimental, diagnostic, or therapeutic purposes.
A radiopaque medium used for urography, angiography, venography, and myelography. It is highly viscous and binds to plasma proteins.
Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)
A compound used as an x-ray contrast medium that occurs in nature as the mineral barite. It is also used in various manufacturing applications and mixed into heavy concrete to serve as a radiation shield.
Improvement in the quality of an x-ray image by use of an intensifying screen, tube, or filter and by optimum exposure techniques. Digital processing methods are often employed.
Substances used to allow enhanced visualization of tissues.
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
X-ray image-detecting devices that make a focused image of body structures lying in a predetermined plane from which more complex images are computed.
Organized periodic procedures performed on large groups of people for the purpose of detecting disease.
Pathological processes in the COLON region of the large intestine (INTESTINE, LARGE).
Imaging methods that result in sharp images of objects located on a chosen plane and blurred images located above or below the plane.
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
The segment of LARGE INTESTINE between the CECUM and the RECTUM. It includes the ASCENDING COLON; the TRANSVERSE COLON; the DESCENDING COLON; and the SIGMOID COLON.
A specialty concerned with the use of x-ray and other forms of radiant energy in the diagnosis and treatment of disease.
A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.
Positive test results in subjects who do not possess the attribute for which the test is conducted. The labeling of healthy persons as diseased when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)
Projection of near-IR light (INFRARED RAYS), in the 700-1000 nm region, across an object in parallel beams to an array of sensitive photodetectors. This is repeated at various angles and a mathematical reconstruction provides three dimensional MEDICAL IMAGING of tissues. Based on the relative transparency of tissues to this spectra, it has been used to monitor local oxygenation, brain and joints.
In INFORMATION RETRIEVAL, machine-sensing or identification of visible patterns (shapes, forms, and configurations). (Harrod's Librarians' Glossary, 7th ed)
The posture of an individual lying face down.
An effective non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiographic procedures. Its low systemic toxicity is the combined result of low chemotoxicity and low osmolality.
Methods to identify and characterize cancer in the early stages of disease and predict tumor behavior.
Unanticipated information discovered in the course of testing or medical care. Used in discussions of information that may have social or psychological consequences, such as when it is learned that a child's biological father is someone other than the putative father, or that a person tested for one disease or disorder has, or is at risk for, something else.
Chemical, spectroscopic, or microscopic detection of extremely small amounts of blood.
Discrete abnormal tissue masses that protrude into the lumen of the DIGESTIVE TRACT or the RESPIRATORY TRACT. Polyps can be spheroidal, hemispheroidal, or irregular mound-shaped structures attached to the MUCOUS MEMBRANE of the lumen wall either by a stalk, pedunculus, or by a broad base.
Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
Application of computer programs designed to assist the physician in solving a diagnostic problem.
Benign neoplasms derived from glandular epithelium. (From Stedman, 25th ed)
Individual's expression of desirability or value of one course of action, outcome, or selection in contrast to others.
A method of comparing the cost of a program with its expected benefits in dollars (or other currency). The benefit-to-cost ratio is a measure of total return expected per unit of money spent. This analysis generally excludes consideration of factors that are not measured ultimately in economic terms. Cost effectiveness compares alternative ways to achieve a specific set of results.
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.
Computed tomography modalities which use a cone or pyramid-shaped beam of radiation.
Formation of an infarct, which is NECROSIS in tissue due to local ISCHEMIA resulting from obstruction of BLOOD CIRCULATION, most commonly by a THROMBUS or EMBOLUS.
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
Endoscopic examination, therapy or surgery of the sigmoid flexure.
The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).
Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.
Any disorder marked by obstruction of conducting airways of the lung. AIRWAY OBSTRUCTION may be acute, chronic, intermittent, or persistent.
A hernia caused by weakness of the anterior ABDOMINAL WALL due to midline defects, previous incisions, or increased intra-abdominal pressure. Ventral hernias include UMBILICAL HERNIA, incisional, epigastric, and spigelian hernias.
An abdominal hernia with an external bulge in the GROIN region. It can be classified by the location of herniation. Indirect inguinal hernias occur through the internal inguinal ring. Direct inguinal hernias occur through defects in the ABDOMINAL WALL (transversalis fascia) in Hesselbach's triangle. The former type is commonly seen in children and young adults; the latter in adults.
Forced expiratory effort against a closed GLOTTIS.
A protrusion of abdominal structures through the retaining ABDOMINAL WALL. It involves two parts: an opening in the abdominal wall, and a hernia sac consisting of PERITONEUM and abdominal contents. Abdominal hernias include groin hernia (HERNIA, FEMORAL; HERNIA, INGUINAL) and VENTRAL HERNIA.
Hypertrophy and dilation of the RIGHT VENTRICLE of the heart that is caused by PULMONARY HYPERTENSION. This condition is often associated with pulmonary parenchymal or vascular diseases, such as CHRONIC OBSTRUCTIVE PULMONARY DISEASE and PULMONARY EMBOLISM.

Performance of multidetector computed tomography colonography compared with conventional colonoscopy. (1/182)

BACKGROUND AND AIMS: This was a prospective blinded study to compare computed tomography (CT) colonography, performed with multidetector arrays CT scan (MDCT), with conventional colonoscopy for the detection of colorectal neoplasia. METHODS: Fifty patients were examined by MDCT after standard bowel preparation and rectal air insufflation in the supine and prone positions. Data sets were examined by one radiologist and one gastroenterologist blinded to the patient's history and colonoscopy results. Patients subsequently underwent colonoscopy on the same day, which served as the gold standard. RESULTS: Nine of 11 lesions >10 mm (82%), 5/15 lesions of 6-9 mm (33%), and 1/42 polyps <5 mm (3%) were detected by MDCT colonography. One false positive result for a structure larger than 10 mm was described. Nineteen of 21 patients who had no lesions during conventional colonoscopy were considered free of lesions by MDCT colonography, yielding a per patient specificity of 90%. CONCLUSION: MDCT colonography provides good data quality and has good sensitivity and specificity for the detection of colonic lesions of 10 mm or more.  (+info)

Virtual endoscopy: a promising new technology. (2/182)

Growing evidence shows that early detection of cancer can substantially reduce mortality, necessitating screening programs that encourage patient compliance. Radiology is already established as a screening tool, as in mammography for breast cancer and ultrasonography for congenital anomalies. Advanced processing of helical computed tomographic data sets permits three-dimensional and virtual endoscopic models. Such models are noninvasive and require minimal patient preparation, making them ideal for screening. Virtual endoscopy has been used to evaluate the colon, bronchi, stomach, blood vessels, bladder, kidney, larynx, and paranasal sinuses. The most promising role for virtual endoscopy is in screening patients for colorectal cancer. The technique has also been used to evaluate the tracheobronchial tree for bronchogenic carcinoma. Three-dimensional and virtual endoscopy can screen, diagnose, evaluate and assist determination of surgical approach, and provide surveillance of certain malignancies.  (+info)

Computer-aided detection and diagnosis at the start of the third millennium. (3/182)

Computer-aided diagnosis has been under development for more than 3 decades. The rate of progress appears exponential, with either recent approval or pending approval for devices focusing on mammography, chest radiographs, and chest CT. Related technologies improve diagnosis for many other types of medical images including virtual colonography, vascular imaging, as well as automated quantitation of image-derived metrics. A variety of techniques are currently employed with success, likely reflecting the variety of imagery used, as well as the variety of tasks. Most areas of medical imaging have had efforts at computer assistance, and some have even received FDA approval and can be reimbursed. We anticipate that the rapid advance of these technologies will continue, and that application will broaden to cover much of medical imaging. Acceptance of, and integration of computer-aided diagnosis technology with the electronic radiology practice is a current challenge. These challenges will be overcome, and we expect that computer-aided diagnosis will be routinely applied to medical images.  (+info)

Current and evolving strategies for colorectal cancer screening. (4/182)

BACKGROUND: Colorectal cancer is a major cause of cancer mortality and morbidity. Screening can potentially prevent most colorectal cancers by detection and removal of precursor adenomas. METHODS: The literature and clinical practice guidelines are reviewed, with an emphasis on advances of the last 10 years and evolving screening methods. RESULTS: Colonoscopy has come to be used for screening in persons at average risk for colorectal cancer because of the comparative ineffectiveness of other methods, although these methods continue to be recommended. Virtual colonoscopy and fecal DNA testing are emerging technologies with promise to be more effective than fecal occult blood testing or sigmoidoscopy in selecting those persons who should undergo colonoscopy. Next to age, family history is the most common risk factor for colorectal cancer and one that warrants more aggressive screening and, in some instances, genetic counseling and testing. Hereditary nonpolyposis colorectal cancer accounts for as many as 1 in 20 colorectal cancers, but to take advantage of recent advances in genetic testing for this disorder, a high level of clinical suspicion must be maintained. CONCLUSIONS: If we are to reduce mortality and morbidity from colorectal cancer, practicing clinicians need to be aware of current and evolving strategies for colorectal screening, and assertively recommend the appropriate strategy to their patients.  (+info)

Chemotherapy and surgery: new perspectives on the treatment of unresectable liver metastases. (5/182)

Liver metastases concern half of patients with colorectal cancer, and are frequently unresectable, jeopardizing patient outcome. Owing to increased efficacy, chemotherapy can render initially inoperable patients amenable to potentially curative resection. The 34% 5-year and 20% 10-year survival of patients resected following neoadjuvant chronomodulated chemotherapy with 5-fluorouracil, folinic acid and oxaliplatin is similar to that of patients whose disease was operable at diagnosis. Recently, a group of 16 patients were treated with irinotecan and became resectable after treatment. Their survival (56% at 3 years) matches that of patients treated with other forms of chemotherapy. The poor prognosis of patients with non-resectable hepatic metastases might now be improved by the combination of chemotherapy and surgery.  (+info)

Extracolonic findings at computed tomography colonography are a challenge. (6/182)

AIM: Our aim was to perform a prospective evaluation of the frequency and diagnostic consequences of extracolonic findings at multidetector array computed tomography colonography (MDCTC) in asymptomatic patients undergoing surveillance for former colorectal polyps or cancer. PATIENTS AND METHODS: Seventy five consecutive patients undergoing surveillance for former colorectal cancer (CRC) or large bowel adenoma were examined with MDCTC. Two independent observers evaluated the images with regard to extracolonic findings. Patient records and radiological information systems were reviewed to determine the results and consequences of the workup derived from MDCTC. RESULTS: Sixty five per cent (95% confidence interval (CI) 55-73%) of patients had extracolonic abnormalities and in 12% (CI 7-18%) of patients additional workup was indicated. Two patients (3% (CI 1-6%)) underwent surgery because of the findings (one) or because of complications of the workup (one). CONCLUSION: MDCTC identifies a large number of extracolonic findings. Approximately 12% of asymptomatic patients undergo additional workup, of benefit to only a few. The high prevalence of extracolonic findings may make MDCTC a problematic colorectal screening tool for both ethical and economic reasons.  (+info)

Computed tomographic virtual colonoscopy to screen for colorectal neoplasia in asymptomatic adults. (7/182)

BACKGROUND: We evaluated the performance characteristics of computed tomographic (CT) virtual colonoscopy for the detection of colorectal neoplasia in an average-risk screening population. METHODS: A total of 1233 asymptomatic adults (mean age, 57.8 years) underwent same-day virtual and optical colonoscopy. Radiologists used the three-dimensional endoluminal display for the initial detection of polyps on CT virtual colonoscopy. For the initial examination of each colonic segment, the colonoscopists were unaware of the findings on virtual colonoscopy, which were revealed to them before any subsequent reexamination. The sensitivity and specificity of virtual colonoscopy and the sensitivity of optical colonoscopy were calculated with the use of the findings of the final, unblinded optical colonoscopy as the reference standard. RESULTS: The sensitivity of virtual colonoscopy for adenomatous polyps was 93.8 percent for polyps at least 10 mm in diameter, 93.9 percent for polyps at least 8 mm in diameter, and 88.7 percent for polyps at least 6 mm in diameter. The sensitivity of optical colonoscopy for adenomatous polyps was 87.5 percent, 91.5 percent, and 92.3 percent for the three sizes of polyps, respectively. The specificity of virtual colonoscopy for adenomatous polyps was 96.0 percent for polyps at least 10 mm in diameter, 92.2 percent for polyps at least 8 mm in diameter, and 79.6 percent for polyps at least 6 mm in diameter. Two polyps were malignant; both were detected on virtual colonoscopy, and one of them was missed on optical colonoscopy before the results on virtual colonoscopy were revealed. CONCLUSIONS: CT virtual colonoscopy with the use of a three-dimensional approach is an accurate screening method for the detection of colorectal neoplasia in asymptomatic average-risk adults and compares favorably with optical colonoscopy in terms of the detection of clinically relevant lesions.  (+info)

Postprocessing techniques of CT colonography in detection of colorectal carcinoma. (8/182)

AIM: To evaluate the value of postprocessing techniques of CT colonography, including multiplanar reformation (MPR), virtual colonoscopy (VC), shaded surface display (SSD) and Raysum, in detection of colorectal carcinomas. METHODS: Sixty-four patients with colorectal carcinoma underwent volume scanning with spiral CT. MPR, VC, SSD and Raysum images were obtained by using four kinds of postprocessing techniques in workstation. The results were comparatively analyzed according to circumferential extent, lesion length and pathology pattern of colorectal carcinomas. All diagnoses were proved pathologically and surgically. RESULTS: The accuracy of circumferential extent of colorectal carcinoma determined by MPR, VC, SSD and Raysum was 100.0%, 82.8%, 79.7% and 79.7%, respectively. There was a significant statistical difference between MPR and VC. The consistent rate of lesion length was 89.1%, 76.6%, 95.3% and 100.0%, respectively. There was a statistical difference between VC and SSD. The accuracy of discriminating pathology pattern was 81.3%, 92.2%, 71.9% and 71.9%, respectively. There was a statistical difference between VC and SSD. MPR could determine accurately the circumference of colorectal carcinoma, Raysum could determine the length of lesion more precisely than SSD, VC was helpful in discriminating pathology patterns. CONCLUSION: MPR, VC, SSD and Raysum have advantage and disadvantage in detection of colorectal carcinoma, use of these methods in combination can disclose the lesion more accurately.  (+info)

PubMed journal article: Computer-aided polyp detection on CT colonography: comparison of three systems in a high-risk human population. Download Prime PubMed App to iPhone, iPad, or Android
October 15, 2012 -- The European Society of Gastrointestinal and Abdominal Radiology (ESGAR) has published its first update on CT colonography (CTC) guidelines since 2007. Its working group on CTC has endorsed 86 statements, reaching near-complete agreement on 71 of the 86 items relating to critical practice areas affecting CTC.. Agreement was most consistent in the areas of colon distension, scan parameters, use of intravenous contrast agents, patient preparation, and the role of computer-aided detection (CAD) and lesion measurement. Less than unanimous accord was seen in the use of spasmolytics, decubitus positioning and the number of CT data acquisitions, fecal tagging, 2D versus 3D reading, and reporting.. Over the last five years, expansion of the CT colonography literature has continued and several important studies, including multicenter studies, have been published, wrote Dr. Emanuele Neri and colleagues from six EU countries on behalf of the ESGAR CTC working group. These new data ...
We read with interest the article by Ginnerup Pedersen et al (Gut 2003;52:1744-7) investigating the frequency and diagnostic consequences of extracolonic findings at multidetector computed tomography (MDCT) colonography.. The authors noted extracolonic findings in 65% of cases, with the need for further workup in 12% and surgery in 3%. The authors concluded that the high prevalence of extracolonic findings may make MDCT colonography a problematic colorectal cancer screening tool for both ethical and economic reasons.. We would like to comment on the question raised by Ginnerup Pedersen et al-namely, whether MDCT colonography should be regarded as a colon examination or a sort of Pandoras box (if used for abdominal screening).. Notably, a recent article has emphasised that one of the major potential advantages of MDCT colonography in comparison with all other existing colorectal diagnostic tests is its ability to detect disease outside the colon.1 Indeed, the possibility that extracolonic ...
The team compared primary computed tomographic colonography screening in 3120 consecutive adults with primary optical colonoscopy screening in 3163 consecutive adults.. The main outcome measures included the detection of advanced neoplasia, and the total number of harvested polyps.. Referral for polypectomy during optical colonoscopy was offered for all computed tomographic colonography-detected polyps of at least 6 mm in size.. Patients with 1 or 2 small polyps also were offered the option of computed tomographic colonography surveillance.. During primary optical colonoscopy, nearly all detected polyps were removed, regardless of size, according to established practice guidelines.. The researchers found 123 advanced neoplasms including 14 invasive cancers during computed tomographic colonography.. Optical colonoscopy screening identified 121 advanced neoplasms including 4 invasive cancers.. The researchers noted that the referral rate for optical colonoscopy in the primary computed tomographic ...
CT colonography has been developed as a less invasive alternative to colonoscopy to decrease perforation-related morbidity and mortality and potentially to increase population adherence with colorectal cancer screening. However, we demonstrate that primary screening with CT colonography is more expensive and leads to more overall deaths than colonoscopy. Our conclusions are sensitive to CT colonographys test performance characteristics, the malignancy risk of missed adenomas, the perforation risk and perforation-related mortality estimates for colonoscopy, the procedural costs, and differences in screening adherence.. It is difficult to know what the test performance characteristics of CT colonography will ultimately be in routine clinical practice. However, even if they rival those of colonoscopy, we have shown that the cost of a CT colonography strategy prohibits recommending it as a primary method for colorectal cancer screening. Even in the best-case scenario, the cost per life-year gained ...
TY - JOUR. T1 - CT colonography with intravenous contrast material. T2 - Varied appearances of colorectal carcinoma. AU - Silva, Alvin C. AU - Hara, Amy K.. AU - Leighton, Jonathan A. AU - Heppell, Jacques P.. PY - 2005/9. Y1 - 2005/9. N2 - Computed tomographic (CT) colonography is a noninvasive, rapidly evolving technique that has been shown in some studies to be comparable with conventional colonoscopy for the screening of colorectal cancer. Because colorectal cancer has a widely varying appearance at both endoscopy and CT colonography, familiarity with the gamut of morphologic appearances can help improve interpretation of the results. The addition of intravenous contrast material to CT colonography can aid differentiation of true colonic masses from pseudolesions such as residual stool and improves the depiction of enhancing masses that might otherwise be obscured by residual colonic fluid. In contrast to staging of most other tumors, staging of colorectal carcinoma depends more on the depth ...
TY - JOUR. T1 - The future of colorectal imaging. T2 - Computed tomographic colonography. AU - Hara, Amy K.. PY - 2002/12/1. Y1 - 2002/12/1. N2 - The development of colorectal cancer screening alternatives that are attractive to patients and effective for screening is critical for reducing this too-common and deadly disease. CTC is an exciting technique that is the only imaging alternative developed since the barium enema for colon screening. In the past few years, many obstacles to clinical implementation of CTC have been eliminated. For example, there is no longer any post-processing time, which was previously as long as 8 to 10 hours, and the interpretation time has been drastically reduced from 4 hours to 15 to 20 minutes. The majority of studies have demonstrated excellent results for detection of lesions ≥1 cm., with few false positives. This examination will continue to improve with the development of automated (computer) detection programs and automated 3D rendering algorithms. In ...
RATIONALE: New diagnostic procedures such as computed tomographic colonography may improve the ability to detect colorectal cancer and may provide a les
The purpose of this paper was to investigate the effect of radiologist experience and increasing exposure to CT colonography on reader performance. Three radiologists of differing general experience (consultant, research fellow, trainee) independently analysed 100 CT colonographic datasets. Readers had no prior experience of CT colonography and received feedback and training after the first 50 cases from an independent experienced radiologist. Diagnostic performance and reporting times were compared for the first and second 50 datasets and compared with the results of a radiologist experienced in CT colonography. Before training only the consultant reader achieved statistical equivalence with the reference standard for detection of larger polyps. After training, detection rates ranged between 25 and 58% for larger polyps. Only the trainee significantly improved after training ( P=0.007), with performance of other readers unchanged or even worse. Reporting times following training were reduced ...
Ill refer to the article in Radiology, Volume 247, where they use gentle laxative and Dulcolax tablets as the laxative in bowel preparation. The second is a noncathartic CT colonography where they did not use laxative. Again reported in AJR 2008. So lets go through one at a time. The study that used limited bowel preparation for CT colonography, they used low fiber diet for two days, and patients did not take any oral laxative except for Dulcolax tablets. And they were given two doses. The patients given high density barium over a certain time period, and they were also given Telebrix as the agent to tag the liquid that may be left behind. So this is just to show you a summary of what theyd done in terms of the fecal tagging agents and the laxative. The results showed the patients who had polyps more than 10 mm or larger, with limited bowel preparation, the sensitivity was very good, 82%. Again, just to show you an image that they showed in the article, they showed large volume of stool in ...
INTRODUCTION. Computed tomography colonography (CTC), or virtual colonoscopy, is an imaging method based on the acquisition of multiple sections obtained by multidetector computed tomography (MDCT), generating sectional views of the colon that later can be reformatted in multiple planes and also processed in to allow endoluminal navigation, as in optical colonoscopy (OC)(1) . Among its main advantages, this method is fast, as the examination is performed in less than 15 minutes, without requiring sedation. For over a decade, CTC has been utilized in the investigation of colonic polyps and colorectal cancer (CRC). Developments in the clinical and epidemiological knowledge on CRC and the many technological advances incorporated by CTC have transformed the method from an investigation tool into a viable option for CRC screening(2 4) .. The method is less invasive than OC for the screening of polyps and may preferably be utilized in asymptomatic individuals with low risk for development of CRC, in ...
Colorectal cancer is the second leading cause of cancer death in the United States and fourth worldwide. Colorectal cancer often develops from precancerous polyps which, when found early, may be easily and safely removed. Colorectal polyps are often asymptomatic and are typically detected through routine optical colonoscopy (OC) screening. While there have been many advancements in polyp detection and OC, roughly 22% of polyps still go undetected during an OC screen and 4-6% of diagnosed colorectal cancers are thought to have been missed on prior colonoscopies. Because the incidence and mortality of colorectal cancer decreases with early detection, it is important to reduce the rates of undetected polyps. Researchers at Arizona State University in collaboration with Dr. Gurudu of the Mayo Clinic have developed two novel systems for computer-aided detection of polyps in optical colonoscopy images. The first system detects polyps by using boundary classifiers and a voting scheme to automatically ...
Discusses virtual colonoscopy (computed tomographic colonography). Covers why and how it is done. Explains how it differs from a regular colonoscopy. Covers things to think about when choosing virtual colonoscopy.
Virtual colonoscopy (VC) is a noninvasive method for colonic polyp screening, by reconstructing three-dimensional models of the colon using computerized tomography (CT). In virtual colonoscopy fly-through navigation, it is crucial to generate an optimal camera path for efficient clinical examination. In conventional methods, the centerline of the colon lumen is usually used as the camera path. In order to extract colon centerline, some time consuming pre-processing algorithms must be performed before the fly-through navigation, such as colon segmentation, distance transformation, or topological thinning. In this paper, we present an efficient image-based path planning algorithm for automated virtual colonoscopy fly-through navigation without the requirement of any pre-processing. Our algorithm only needs the physician to provide a seed point as the starting camera position using 2D axial CT images. A wide angle fisheye camera model is used to generate a depth image from the current camera ...
As Americans celebrate National Colorectal Cancer Awareness Month, the Colon Cancer Alliance, COLONTOWN-a survivor/patient support group for colorectal disease, including cancer-and the American College of Radiology call on Congress to pass the CT Colonography Screening for Colorectal Cancer Act (H.R. 991). Introduced recently by Representatives Ralph Hall (R-TX) and Danny Davis (D-IL), H.R. 991 would require Medicare to cover beneficiaries for CT colonography (virtual colonoscopy).. Colorectal cancer is the third leading cause of death from cancer in the United States. However, thousands of Americans, particularly minorities, who are at risk for developing the disease, forgo screening every year. Increasing screening compliance is vitally important in the fight against colorectal cancer, and virtual colonoscopy can attract those who cant or wont choose other forms of screening. I urge Congress to act now and support passage of H.R. 991, said Andrew Spiegel, Chief Executive Officer of the ...
The study by Rockey et al prospectively evaluated ACBE, CTC, and colonoscopy for the diagnosis of colonic neoplasia in high risk patients. The study showed the accuracy of colonoscopy to be higher than that of ACBE or CTC. Overall, the study was well designed and well done. All investigators were adequately trained to do the tests being evaluated. Each test was interpreted blind, with segmental unblinding during the colonoscopy and independent blinded review of discordant results on any of the 3 tests. All tests were repeated in the event of continued disagreement. This rigorous method minimises bias in favour of colonoscopy.. The study has 2 limitations. Firstly, no barium stool tagging was used for CTC. Because colonic lesions can be obscured by untagged fluid and stool, this lowers the accuracy of CTC. Secondly, the Vitrea software used in the study has limited 3 dimensional reconstruction, with lower resolution for polyp conspicuity and less similarity to optical colonoscopy than the ...
Potentially precancerous polyps detected with CT colonography (CTC) need to be removed subsequently, using an optical colonoscope (OC). Due to large colonic deformations induced by the colonoscope, even very experienced colonoscopists find it difficult to pinpoint the exact location of the colonoscope tip in relation to polyps reported on CTC. This can cause unduly prolonged OC examinations that are stressful for the patient, colonoscopist and supporting staff. We developed a method, based on monocular 3D reconstruction from OC images, that automatically matches polyps observed in OC with polyps reported on prior CTC. A matching cost is computed, using rigid point-based registration between surface point clouds extracted from both modalities. A 3D printed and painted phantom of a 25 cm long transverse colon segment was used to validate the method on two medium sized polyps. Results indicate that the matching cost is smaller at the correct corresponding polyp between OC and CTC: the value is 3.9 ...
Ultrasound is often the first line of imaging used to investigate SH.1, 2, 5Although operator dependent, it can be used to make a diagnosis of SH in a large proportion of patients. In addition, a Valsalva manoeuvre can be used in supine and erect sonography to determine the presence of SH.3. There is a slightly higher incidence of SH in women than in men; in adults, it usually occurs during the fourth and seventh decades.1, 2, 6It may occur on either side of the body, or occasionally bilaterally.1There are several known predisposing factors: obesity, chronic obstructive airways disease, previous surgery or laparoscopy, peritoneal dialysis, multiple pregnancies, and rapid weight loss, for example.2, 6, 7. Clinical presentation varies, depending on the content of the hernial sac. In obese individuals, detection of SH may be particularly difficult as the hernia may not be palpable on clinical examination. Some patients may complain of pain, but no lump is palpable.6Omentum and/or segments of the ...
Virtual colonoscopy. Discover more here from Bupa about what a virtual colonoscopy is and why its used, for example, to check for polyps or bowel cancer.
For colorectal cancer screening, does computed tomography have a cost advantage relative to optical colonoscopy for the commercially insured U.S. population?
According to the up-to-date statistics from American Cancer Society [ 1 ], colon and rectum cancer ranks the third most common occurrence of both
The use of CT colonography (CTC) as both a diagnostic and screening examination for colon cancer is steadily increasing. It also is valuable as a prognostic ...
The most renowned CT Colonography course in Europe, imitated by many. The only course where workstations of several vendors are simultaneously available. Initiated in 2003, it underwent numerous complete revolutions in teaching approach, trying to improve the educational needs of the attendees. In order to maximize time devoted to hands-on training, another major change was implemented starting in 2016, i.e., the combination of the on-site workshop with webinars. Most of the lectures will be available on the ESGAR website for reviewing before the workshop, leaving more time for on-site case-based training. Televoting is further implemented for a more interactive experience of the attendees ...
Learn more about CT Colonography at Portsmouth Regional Hospital DefinitionReasons for TestPossible ComplicationsWhat to ExpectCall Your Doctorrevision ...
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CT virtual colonoscopy with the use of a three-dimensional approach is an accurate screening method for the detection of colorectal neoplasia in asymptomatic average-risk adults and compares favorably with optical colonoscopy in terms of the detection of clinically relevant lesions.
Health, ...Providing computed tomography colonography (CTC) otherwise known as v...CRC is the second leading cause of cancer in the U.S. While colonosco...The study performed at the National Naval Medical Center in Bethesda... Had CTC not been an available option 91 of the 250 patients would h...,Virtual,colonoscopy,option,could,improve,colorectal,cancer,screening,rates,,patient,survey,suggests,medicine,medical news today,latest medical news,medical newsletters,current medical news,latest medicine news
PURPOSE: To prospectively evaluate the effects of z-axis spatial resolution and tube current on the sensitivity of a commercially available computed tomographic (CT) colonography computer-aided diagnosis (CAD) system for polyp detection by using pig colon phantoms. MATERIALS AND METHODS: Ninety-six polyps were created and analyzed in 14 pig colon phantoms. CT colonography was performed by using a 16-detector CT scanner at 0.75-mm collimation; 10, 50, 100, and 160 mAs; and a pitch of 1.5. At each milliampere-second setting, the CT images were reconstructed with a section thickness (ST) of 1.5 mm and a reconstruction increment (RI) of 1.3 mm. To evaluate the effect of z-axis spatial resolution, CT images were also reconstructed at 100 mAs with various SI and RI combinations (respectively: 1.0 and 0.7 mm, 3.0 and 2.0 mm, 3.0 and 3.0 mm, 5.0 and 5.0 mm). The phantom data were then analyzed by using a CAD program. CAD performance with different CT parameters was calculated and compared in terms of ...
Computed Tomography (CT or CAT scan) is an imaging method that uses x-rays to create pictures of cross-sections of the body.. Electron-beam computed tomography (EBCT) is a test that looks for specks of calcium (called calcifications) in the walls of the coronary arteries.. Magnetic resonance imaging (MRI) uses a large magnet and radio waves to look at organs and structures inside the body.. Magnetic Resonance Angiography (MRA) is a non-invasive technique MRI technique used to diagnose blood vessel patency or blood flow abnormalities.. Multidetector CT (MDCT) scans take images of the beating heart, and show calcium and blockages in the heart arteries.. PET (Positron Emission Tomography) produces high energy, 3-D computer-reconstructed images measuring and determining the function or physiology in a specific organ, tumor, or other metabolically active site.. Virtual colonoscopy (VC) (or Computerized Tomographic Colonography (CTC) uses x rays and computers to produce two- and three-dimensional ...
June 20, 2008 - iCAD Inc. said it has initiated a clinical study for Colon CAD, its virtual colonoscopy CAD product, in partnership with ACR Image Metrix, a subsidiary of the American College of Radiology (ACR).. iCAD and ACR Image Metrix, having completed the development portion of the study, are collaborating on study execution including a multi-reader, multi-case (MRMC) clinical study designed to assess the impact of Colon CAD on the accuracy of interpreting CT Colonography exams also known as virtual colonoscopies. The study will also assess the sensitivity of Colon CAD for detecting polyps and will measure the impact of iCADs CT Colon CAD product on interpretation and workflow.. Virtual colonoscopy offers patients a less invasive option to conventional colonic polyp detection techniques. According to the company, reviewing these images can be tedious and challenging because of the amount of information captured in a CT exam. ICADs colon CAD product uses sophisticated image processing ...
A model predicting complications for colorectal screening options found a greater risk of cancer deaths and procedure-related deaths in virtual colonoscopy as compared to traditional colonoscopy.
An online colonoscopy is definitely an outpatient procedure, but its usually performed inside a hospital.. You will not be looked into in to the hospital and may leave within 24 hours because the test. You will not be sedated either.. The exam takes about ten to fifteen minutes to accomplish. The testing process is really as follows:. If you are getting a CT virtual colonoscopy, you might be requested to consume a liquid contrast agent. In some instances, you might go ahead and take contrast in pill form in your own home.. A skinny, flexible tube is going to be put into your rectum.. For CT procedures, room air or co2 is gradually pumped in to the tube to inflate your rectum and permit for closer examination.. For MRI exams, a contrast agent thats given rectally can be used to enlarge the region.. The table youre laying on will slide in to the CT or MRI machine. Your physician may request you to hold your breath for any couple of moments to get a stable image.. Youll have a minimum of 2 ...
Virtual Colonoscopy, CT exam for detecting polyps and cancer in the colon, Suburban Imaging, board-certified radiologists, radiology centers in Twin Cities Metro Area, Blaine, Maple Grove, Edina, Southdale, Coon Rapids, Minnesota
Virtual colonoscopy (VC) is an imaging or x-ray test that looks for cancer, polyps, or other disease in the large intestine (colon). Learn more about this test.
Question - Painful bowel movements, blood in stools. Virtual colonoscopy recommended. Other options?. Ask a Doctor about diagnosis, treatment and medication for Hemorrhoid, Ask a Gastroenterologist
CT Imaging and Medical Imaging protocols, teaching files, images, lectures, podcasts, vodcasts, 3D CTA cases and Atlas, CT scanning.|CTisus
Doctors give unbiased, helpful information on indications, contra-indications, benefits, and complications: Dr. Tisdale on virtual colonoscopy accuracy: If you are talking about a groin hernia, the answer is no.
Browse the archive of Virtual Colonoscopy Software market reports and research in the United States, European, Asia-Pacific, and Latin American regions.
https://www.immersivecomputinglab.org/wp-content/uploads/2021/01/nyu-logo-1.jpg 0 0 Academic Web Pages https://www.immersivecomputinglab.org/wp-content/uploads/2021/01/nyu-logo-1.jpg Academic Web Pages2014-11-09 14:28:492021-01-31 07:44:58Benefits of 3D Immersion for Virtual Colonoscopy - Article link ...
Care guide for Virtual Colonoscopy (Aftercare Instructions). Includes: possible causes, signs and symptoms, standard treatment options and means of care and support.
Care guide for Virtual Colonoscopy (Precare). Includes: possible causes, signs and symptoms, standard treatment options and means of care and support.
A machine learning algorithm helps accurately differentiate benign and premalignant colorectal polyps on CT colonography scans, according to a study publishe
BALTIMORE -- CT colonography for colorectal cancer screening will not be covered under Medicare, the Centers for Medicare and Medicaid Services has confirmed.
syngo Colonography CT is a clinical application dedicated for noninvasive evaluation of the entire colon based on low-dose, high-resolution spiral CT scans.
CTC suffers from errors due to imperfect cleansing of the colon. Retained fluid and stool in the colon lumen hides the colon wall, thus degrades polyp detection performance, manual or computer aided. The standard practice against this is to scan the patient twice, in prone and in supine positions and examine the two sets of data in practice. This requires accurate registration of the datasets. Due to the extreme flexibility of the colon wall, this problem has proven to be very difficult. As a first step towards full registration and as a practical solution to the problem, we have considered to register the central axes of the supine and prone colons. Thus, the MDs will be able to accurately locate themselves in parallel in both datasets along the central axes. This will provide a practical and easy way to confirm polyp detections on two datasets. This study is an improvement over our previously proposed algorithm (RSNA2001 & EMBC2001). Here, we used Dynamic Time Warping algorithm where the time ...
Results: Tagging was optimal in 95.3% of the cases, and reader confidence was high. Sensitivities were 64.1%-66.7% (for the 2 readers) for 5- to 9-mm polyps and 91.7% for larger polyps. The overall specificity was 94.2% and 95%. Sensitivity improved during the study for both 5- to 9-mm polyps (from 54.2%-58.3% to 80%) and polyps larger than 9 mm (from 50% to 100%). Specificity changed nonuniformly ...
The standard on patient information and consent sets out the following minimum acceptable practice and best practice which are still relevant today [6]. • The process of providing patient information must follow an established pathway. • If using local information leaflets, they must comply with national standards. • The writing of information leaflets must be carried out in liaison with patient/service user advisory groups. • National Patient Safety Guidelines (NPSA) must be followed during the prescribing of laxatives for bowel preparation. A narrow window width results in a high con- -1000 HU air trast image. 4. A CT image contains a wide range of X-ray attenuation values, converted into Hounsfield units. But the eye cannot visualise so many grades of signal within the associated greyscale. Thus, the range of tissue attenuations to be visualised on a CT image is narrowed down to a window width of values, centred around an attenuation value which is called the window level. Typical ...
Hi! It was suggested that I start a new thread on this topic so that my post would not be lost. So glad I found this discussion board. History: I have had several bouts of IBS iover my adult life. Typical symtoms - bloating, occassional cramping, sometimes diarrhea and sometimes constipation, noisy GI tract, etc. but never any evidence of blood. Diet seems to be the main contributor. If I stick with lean proteins, fresh fruits & veggies, minimize processed foods, the symptoms go away. Starting several months ago, the symptoms returned. Over the past year, I started taking canned soup to work for lunch, added a snack almost every day from the vending machine, and my husband began relying on making a pasta dish for dinner several times a week.. In others words, a big increase in processed foods. I went to my primary care doctor as the symptoms seemed more extreme than what I remember from about 10 years ago. She suggested the Stanford FODMAP diet, which is basically gluten-free, lactose-free, ...
Hi! It was suggested that I start a new thread on this topic so that my post would not be lost. So glad I found this discussion board. History: I have had several bouts of IBS iover my adult life. Typical symtoms - bloating, occassional cramping, sometimes diarrhea and sometimes constipation, noisy GI tract, etc. but never any evidence of blood. Diet seems to be the main contributor. If I stick with lean proteins, fresh fruits & veggies, minimize processed foods, the symptoms go away. Starting several months ago, the symptoms returned. Over the past year, I started taking canned soup to work for lunch, added a snack almost every day from the vending machine, and my husband began relying on making a pasta dish for dinner several times a week.. In others words, a big increase in processed foods. I went to my primary care doctor as the symptoms seemed more extreme than what I remember from about 10 years ago. She suggested the Stanford FODMAP diet, which is basically gluten-free, lactose-free, ...
"Feasibility of Simultaneous Computed Tomographic Colonography and Fully Automated Bone Mineral Densitometry in a Single ... "Computed Tomographic Virtual Colonoscopy Computer-Aided Polyp Detection in a Screening Population". Gastroenterology. 129 (6): ...
... computed tomographic colonography - computed tomography - computed tomography colography - computerized axial tomography - ... single-photon emission computed tomography - siplizumab - sirolimus - small cell lung cancer - small intestine - smoldering ... helical computed tomography - helper T cell - hemagglutinin-neuraminidase - hemangiopericytoma - hemangiosarcoma - hematogenous ...
... x-ray computed MeSH E01.370.350.600.350.700.810.180 - colonography, computed tomographic MeSH E01.370.350.600.350.700.810.800 ... x-ray computed MeSH E01.370.350.350.810.180 - colonography, computed tomographic MeSH E01.370.350.350.810.800 - tomography, ... x-ray computed MeSH E01.370.350.700.700.810.180 - colonography, computed tomographic MeSH E01.370.350.700.700.810.800 - ... x-ray computed MeSH E01.370.350.700.810.810.180 - colonography, computed tomographic MeSH E01.370.350.700.810.810.800 - ...
In 2001, she led a landmark study which found that Computed Tomographic (CT) colonography (virtual colonoscopies) was just as ... study as site principal investigator of a large multi-center trial which confirmed her earlier work that CT colonography was a ...
R. M. Summers et al., "Feasibility of simultaneous computed tomographic colonography and fully automated bone mineral ... In medicine, peripheral quantitative computed tomography, commonly abbreviated pQCT, is a type of quantitative computed ... Quantitative computed tomography (QCT) is a medical technique that measures bone mineral density (BMD) using a standard X-ray ... Using other non-IV contrast abdominal or pelvic scans such as a Virtual Colonography studies, the QCT exam can be performed ...
The other screening tests include flexible sigmoidoscopy, double-contrast barium enema, computed tomographic (CT) colongraphy ( ... Duodenography and colonography are performed like a standard abdominal examination using B-mode and color flow Doppler ... Virtual colonoscopy, which uses 2D and 3D imagery reconstructed from computed tomography (CT) scans or from nuclear magnetic ... Anastassiades CP, Cremonini F, Hadjinicolaou D (2008). "Colonoscopy and colonography: back to the roots". Eur Rev Med Pharmacol ...
In multislice computed tomography (MSCT) or multidetector computed tomography (MDCT), a higher number of tomographic slices ... CT colonography (also known as virtual colonoscopy or VC for short) is far more accurate than a barium enema for detection of ... "Computed tomography" redirects here. For non-medical computed tomography, see industrial computed tomography scanning. For non- ... Main article: Computed tomography angiography. Computed tomography angiography (CTA) is contrast CT to visualize arterial and ...
"Projected cancer risks from computed tomographic scans performed in the United States in 2007". Arch. Intern. Med. 169 (22): ... Virtual colonography is far more accurate than a barium enema for detection of tumors and uses a lower radiation dose. CT is a ... A CT scan or computed tomography scan (formerly known as computed axial tomography or CAT scan) is a medical imaging technique ... Keaveny, Tony M. (March 2010). "Biomechanical computed tomography-noninvasive bone strength analysis using clinical computed ...
"Cervical and cranial computed tomographic angiography with automated bone removal: Dual energy computed tomography versus ... Initial experience with dual-contrast agent K-edge colonography". Radiology. 283: 160890. Zhang, D.; Li, X.; Liu, B. (2011). " ... In the 70's, spectral computed tomography (CT) with exposures at two different voltage levels was proposed by G.N. Hounsfield ... Roessl, E.; Proksa, R. (2007). "K-edge imaging in X-ray computed tomography using multi-bin photon counting detectors". Phys. ...
In multislice computed tomography (MSCT) or multidetector computed tomography (MDCT), a higher number of tomographic slices ... CT colonography (also known as virtual colonoscopy or VC for short) is far more accurate than a barium enema for detection of ... "Computed tomography" redirects here. For non-medical computed tomography, see industrial computed tomography scanning. For non- ... Main article: Computed tomography angiography. Computed tomography angiography (CTA) is contrast CT to visualize arterial and ...
The other screening tests include flexible sigmoidoscopy, double-contrast barium enema, computed tomographic (CT) colongraphy ( ... Duodenography and colonography are performed like a standard abdominal examination using B-mode and color flow Doppler ... Anastassiades CP, Cremonini F, Hadjinicolaou D (2008). "Colonoscopy and colonography: back to the roots". Eur Rev Med Pharmacol ... Virtual colonoscopy, which uses 2D and 3D imagery reconstructed from computed tomography (CT) scans or from nuclear magnetic ...
... colonography (virtual colonoscopy) to detect abnormalities in the colon ... Scotland and Northern Ireland on computed tomographic colonoscopy (virtual colonography).. Description. CT colonography is used ... Computed tomographic colonography (virtual colonoscopy). Interventional procedures guidance [IPG129]. Published: 22 June 2005. ... CT colonography is performed on an empty bowel. Sedation is not usually required. The colon is distended by insufflation with ...
Computed tomographic colonography (CTC) is a screening test that looks for signs of colorectal cancer. This test is also called ... Computed tomographic colonography (CTC) is a screening test that looks for signs of colorectal cancer. This test is also called ...
Computed tomographic colonography (CTC) is a minimally invasive technique for colonic polyps and cancer screening. The marginal ... Computer-aided marginal artery detection on computed tomographic colonography Author(s): Zhuoshi Wei; Jianhua Yao; Shijun Wang ... in case of colon collapse and inability to directly compute the endoluminal centerline. This paper proposes an automatic method ...
A 68-year-old obese man underwent computed tomographic colonography (CTC) scanning to investigate worsening constipation and ... Computed tomography (CT) has been shown to produce the most accurate imaging in the diagnosis of Spigelian hernia. In this case ... report, CT colonography (CTC) demonstrated additional findings, making the diagnosis more readily achievable. ...
Is Computed Tomographic Colonography Being Held to a Higher Standard? Annals of Internal Medicine; 152 (3): 178-181 ... Computed tomographic colonography was accurate in detecting adenomas 10 mm or larger but less so for smaller lesions. Patient ... Colon screening by optical colonoscopy (OC) or computed tomographic colonography (CTC) requires a laxative bowel preparation, ... Diagnostic Accuracy of Laxative-Free Computed Tomographic Colonography for Detection of Adenomatous Polyps in Asymptomatic ...
Computed tomographic colonography without cathartic preparation performed well in detecting colorectal polyps ... Computed tomographic colonography without cathartic preparation performed well in detecting colorectal polyps ... Computed tomographic colonography without cathartic preparation performed well in detecting colorectal polyps ...
Analysis of air contrast barium enema, computed tomographic colonography, and colonoscopy: prospective comparison. Lancet 2005; ... Analysis of air contrast barium enema, computed tomographic colonography, and colonoscopy: prospective comparison. Lancet 2005; ... Colonoscopy detected colon polyps better than air contrast barium enema or computed tomographic colonography ... Colonoscopy detected colon polyps better than air contrast barium enema or computed tomographic colonography ...
The purpose of this study is to compare the effectiveness of Colon Capsule Endoscopy versus Computed Tomographic Colonography ... A Study to Compare the Effectveness of Colon Capsule Endoscopy versus Computed Tomographic Colonography in Screening to ... Subject with history of colorectal cancer or adenoma (including those identified by computed tomography [CT], optical ...
CT colonography compared with colonoscopy resulted in a negative predictive value of 96.3% overall. When limited to FOBT- ... Context: Computed tomographic (CT) colonography has been recognized as an alternative for colorectal cancer (CRC) screening in ... Diagnostic accuracy of computed tomographic colonography for the detection of advanced neoplasia in individuals at increased ... Overall, CT colonography identified 151 of 177 participants with advanced neoplasia 6 mm or larger (sensitivity, 85.3%; 95% ...
... computed tomographic (CT) colonography has been compared with an imperfect test, colonoscopy, and has been mainly assessed in ... With CT colonography, 84% of patients (26/31) with large polyp(s) were identified, paired for a specificity of 92% (200-201/218 ... CT colonography detected 75%-77% (36-37/48) of large polyps, with 9 of the missed lesions being flat. CONCLUSIONS CT ... METHODS A total of 249 consecutive patients at increased risk for colorectal cancer underwent CT colonography before ...
Computed tomographic colonography. Together they form a unique fingerprint. * Computed Tomographic Colonography Medicine & ... The future of colorectal imaging : Computed tomographic colonography. / Hara, Amy K.. In: Gastroenterology Clinics of North ... Hara, AK 2002, The future of colorectal imaging: Computed tomographic colonography, Gastroenterology Clinics of North America ... The future of colorectal imaging: Computed tomographic colonography. Gastroenterology Clinics of North America. 2002 Dec 1;31(4 ...
... computed tomographic colonography (CTC), and histopathology were collated from a colorectal cancer screening program and two ... Terminal digit preference biases polyp size measurements at endoscopy, computed tomographic colonography, and histopathology. ... Terminal digit preference biases polyp size measurements at endoscopy, computed tomographic colonography, and histopathology. ... Terminal digit preference biases polyp size measurements at endoscopy, computed tomographic colonography, and histopathology. ...
There are different tests for diagnosis, one of which is computed tomographic colonography (CTC). No test is perfect, and ... There are different tests for diagnosis, one of which is computed tomographic colonography (CTC). No test is perfect, and ... after computed tomographic colonography: Protocol for a systematic review ... after computed tomographic colonography: Protocol for a systematic review ...
Iatrogenic Colonic Perforation due to Computed Tomographic Colonography. Abstract Kato T. · Muroya T. · Goda T. · Takabayashi K ...
Computed tomographic colonography, fecal DNA testing, and Pillcam Colon are promising tests that need further study before they ... COMPUTED TOMOGRAPHIC COLONOGRAPHY. Computed tomographic colonography, or virtual colonoscopy, requires a complete bowel ... Computed tomographic colonography, fecal DNA testing, and Pillcam Colon are promising tests that need further study before they ... Studies of computed tomographic colonography have reported sensitivities of 55 to 100 percent and specificities of 86 to 98 ...
The medical name of this test is CT colonography. ... Colonoscopy - virtual; CT colonography; Computed tomographic ... Computed tomography colonography. In: Gore RM, Levine MS, eds. Textbook of Gastrointestinal Radiology. 4th ed. Philadelphia, PA ... The medical name of this test is CT colonography. ...
Colonoscopy detected colon polyps better than air contrast barium enema or computed tomographic colonography: Commentary. ... Colonoscopy detected colon polyps better than air contrast barium enema or computed tomographic colonography : Commentary. / ... Colonoscopy detected colon polyps better than air contrast barium enema or computed tomographic colonography: Commentary. ... title = "Colonoscopy detected colon polyps better than air contrast barium enema or computed tomographic colonography: ...
The role of computed tomographic colonography in the diagnosis of an inverted appendix is described in an adult woman, with ... Inverted appendix: Computed tomographic colonography diagnosis in a patient and lesson learned. ...
Adolescent , Adult , Aged , Aged, 80 and over , Colonography, Computed Tomographic , Methods , Reference Standards , Colorectal ... Staging of colorectal cancer using contrast-enhanced multidetector computed tomographic colonography Srikala NARAYANAN; Naveen ... Staging of colorectal cancer using contrast-enhanced multidetector computed tomographic co ... evaluate the accuracy of colorectal cancer staging done using contrast-enhanced multidetector computed tomographic colonography ...
Computed tomographic colonography (virtual colonoscopy): a multicenter comparison with standard colonoscopy for detection of ... Analysis of air contrast barium enema, computed tomographic colonography, and colonoscopy: prospective comparison. Lancet 2005; ... Computed tomographic virtual colonoscopy to screen for colorectal neoplasia in asymptomatic adults. N Engl J Med 2003;349:2191- ... Background: Computerized tomographic (CT) colonography is a potential alternative to colonoscopy for colorectal cancer ...
Computed tomographic colonography (virtual colonoscopy). The National CT Colonography Trial with over 2500 patients suggested a ... a combination of annual fecal tests and sigmoidoscopy every 5 years or CT colonography every 5 years. ...
Meta-analysis: computed tomographic colonography. Ann Intern Med 2005; 142: 635-50.. *CrossRef, ... The future of colorectal imaging: computed tomographic colonography. Gastroenterol Clin North Am 2002; 31: 1045-60.. *CrossRef, ... Computed tomographic colonography without cathartic preparation for the detection of colorectal polyps. Gastroenterology 2004; ... CON Immediate colonoscopy is not necessary in patients who have polyps smaller than 1 cm on computed tomographic colonography. ...
computed tomographic colonography. Other Names: *CT colonography. *computed tomographic colonography. Active Comparator: ...
Risk Factors Associated With Incomplete Colonoscopy Based on the Analysis of Computed Tomographic Colonography Findings. Lee, ... Computed Tomographic Features of Primary Small Cell Neuroendocrine Tumors of the Gallbladder. Faraoun, Sid Ahmed; Guerrache, ... Evaluation of Stomach Neoplasms With 3-Dimensional Computed Tomography: Focus on the Potential Role of Cinematic Rendering. ... The Accuracy of Left Ventricular and Left Atrial Volumetry Using 64-Slice Computed Tomography: In Vitro Validation Study With ...
... for computed tomographic (CT) colonography is as effective as optical colonoscopy for detection of significant adenomas. ... METHODS: Ten readers trained in CT but without special expertise in colonography interpreted CT colonography images of 107 ... CONCLUSIONS: CAD for CT colonography significantly increases per-patient and per-polyp detection and significantly reduces ... Computed tomographic colonography: assessment of radiologist performance with and without computer-aided detection. ...
Computed tomographic (CT) colonography, every 5 years * Flexible sigmoidoscopy, every 5 years ...
Computed Tomographic (CT) Colonography for Diagnostic Uses 10/01/2015 10/01/2017 N/A 09/21/2017 Active Computed Tomographic (CT ... Cardiac Computed Tomography (CCT) and Coronary Computed Tomography Angiography (CCTA) 10/01/2015 01/01/2018 N/A 04/06/2018 ... Cardiac Computed Tomography (CCT) and Coronary Computed Tomography Angiography (CCTA). L33560 Cardiovascular Nuclear Medicine ...
Meta-analysis: computed tomographic colonography. Ann Intern Med 2005;142:635-650. ... Computed tomographic colonography (virtual colonoscopy): a multicenter comparison with standard colonoscopy for detection of ... computed tomographic colonography, and colonoscopy: prospective comparison. Lancet 2005;365:305-311. ... Computed tomographic virtual colonoscopy to screen for colorectal neoplasia in asymptomatic adults. N Engl J Med 2003;349:2191- ...
  • Colon screening by optical colonoscopy (OC) or computed tomographic colonography (CTC) requires a laxative bowel preparation, which inhibits screening participation. (annals.org)
  • Subject with history of colorectal cancer or adenoma (including those identified by computed tomography [CT], optical colonoscopy, sigmoidoscopy, etc. (mayo.edu)
  • BACKGROUND & AIMS: In isolation, computer-aided detection (CAD) for computed tomographic (CT) colonography is as effective as optical colonoscopy for detection of significant adenomas. (ox.ac.uk)
  • A study on patient acceptance and preference comparing CT colonography, optical colonoscopy and double-contrast barium enema demonstrated that patients prefer CTC[ 4 ]. (jcancer.org)
  • Dr David Kim and colleagues compared the diagnostic yield from parallel computed tomographic colonography and optical colonoscopy screening programs. (gastrohep.com)
  • The team compared primary computed tomographic colonography screening in 3120 consecutive adults with primary optical colonoscopy screening in 3163 consecutive adults. (gastrohep.com)
  • Referral for polypectomy during optical colonoscopy was offered for all computed tomographic colonography-detected polyps of at least 6 mm in size. (gastrohep.com)
  • The team noted that advanced neoplasia was confirmed in 3% of patients in both the computed tomographic colonography and optical colonoscopy groups. (gastrohep.com)
  • The total numbers of polyps removed in the computed tomographic colonography and optical colonoscopy groups were 561 and 2434, respectively. (gastrohep.com)
  • There were 7 colonic perforations in the optical colonoscopy group, and none in the computed tomographic colonography group. (gastrohep.com)
  • Dr Kim's team concluded, "Primary computed tomographic colonography and optical colonoscopy screening strategies resulted in similar detection rates for advanced neoplasia. (gastrohep.com)
  • These findings support the use of computed tomographic colonography as a primary screening test before therapeutic optical colonoscopy. (gastrohep.com)
  • This new exam is called a laxative-free computed tomographic colonography (CTC) or virtual colonoscopy. (cnn.com)
  • Computed tomographic colonography (CTC) is a minimally invasive technique for colonic polyps and cancer screening. (spie.org)
  • Q In patients at high risk of colonic neoplasia, what is the comparative accuracy of air contrast barium enema (ACBE), computed tomographic colonography (CTC), and colonoscopy for detecting large colonic polyps? (bmj.com)
  • In patients at high risk of colonic neoplasia, colonoscopy was more sensitive and specific than air contrast barium enema or computed tomographic colonography for detecting large colonic polyps. (bmj.com)
  • Comparison of time-efficient CT colonography with two- and three- dimensional colonic evaluation for detecting colorectal polyps. (springer.com)
  • Specifically, we have developed computer graphics methods for evaluation of imaging data such as CT colonography which is now widely used to screen for colonic polyps. (stanford.edu)
  • Colonic wall thickening on computed tomography scan and clinical correlation. (ebscohost.com)
  • With the introduction of multidetector-row computed tomography (MD-CT), CT colonography (CTC) has gained influence as a new diagnostic tool in early detection of colonic pathologies by acquiring volumetric CT data sets of the abdomen. (tum.de)
  • In this article, the status of CT colonography as a method of detecting colonic polyps and colorectal carcinomas using single- and multidetector-row CT will be reviewed. (tum.de)
  • Firstly, CT colonography is usually performed with a low dose technique which exploits the high contrast that exists at the colonic mucosa-air interface. (bmj.com)
  • This prospective trial was designed to compare the performance characteristics of five different screening tests in parallel for the detection of advanced colonic neoplasia: CT colonography (CTC), colonoscopy (OC), flexible sigmoidoscopy (FS), faecal immunochemical stool testing (FIT) and faecal occult blood testing (FOBT). (bmj.com)
  • CT colonography (CTC), also known as virtual colonoscopy, and faecal immunochemical tests (FITs) have been proposed as screening tests for colonic neoplasia. (bmj.com)
  • a There are no data from RCTs on the effect of other screening interventions (i.e., fecal occult blood test combined with sigmoidoscopy, barium enema, colonoscopy, computed tomographic colonography, and stool DNA mutation tests) on mortality from colorectal cancer. (cigna.com)
  • Other tests include sigmoidoscopy, stool tests, and computed tomographic colonography. (trihealth.com)
  • The second-tier tests include CT colonography every 5 years, the FIT-fecal DNA test every 3 years, and flexible sigmoidoscopy every 5 to 10 years. (elsevier.com)
  • Abstract: The technological advances in computed tomography (CT) scanners and their continuously increased use have raised concern about the patient-induced risks from the CT procedures. (medworm.com)
  • CT colonography is used to examine the colon and rectum, and detect abnormalities such as polyps and cancer. (nice.org.uk)
  • The purpose of this study is to compare the effectiveness of Colon Capsule Endoscopy versus Computed Tomographic Colonography for the screening of colon polyps in the usual screening population. (mayo.edu)
  • Sharma, VK & Nguyen, CC 2005, ' Colonoscopy detected colon polyps better than air contrast barium enema or computed tomographic colonography: Commentary ', Evidence-Based Medicine , vol. 10, no. 4, pp. 124. (elsevier.com)
  • METHODS: Ten readers trained in CT but without special expertise in colonography interpreted CT colonography images of 107 patients (60 with 142 polyps), first without CAD and then with CAD after temporal separation of 2 months. (ox.ac.uk)
  • Doctors might also use a newer procedure called CT colonography (CTC, also called virtual colonoscopy) to find polyps and early cancer. (annals.org)
  • CT colonography in the detection of colorectal polyps and cancer: systematic review, meta-analysis, and proposed minimum data set for study level reporting. (springer.com)
  • Nonadenomatous polyps at CT colonography: prevalence, size distribution, and detection rates. (springer.com)
  • Multi-scale characterizations of colon polyps via computed tomographic colonography. (nih.gov)
  • Effectiveness of screening was based upon the diagnostic accuracy of tests in detecting polyps and cancer.RESULTS:CT colonography every 5 or 10 yr was effective and cost-effective relative to no screening. (semanticscholar.org)
  • Detection of colorectal polyps by computed tomographic colography: Feasibility of a novel technique. (mayoclinic.org)
  • Computed tomographic colonography (CTC): Possibilities and limitations of clinical application in colorectal polyps and cancer. (tum.de)
  • This contested terrain has shifted since the introduction of newer imaging technologies, such as computed tomography colonography (CTC), 2 , 5 , 6 which is widely recognised as a highly sensitive and specific test for identifying polyps and cancer in the colon. (scielo.org.za)
  • Computed tomography colonography is a minimally invasive method for screening for polyps and colorectal cancer, with extremely unusual complications, increasingly used in the clinical practice. (scielo.br)
  • Patients with 1 or 2 small polyps also were offered the option of computed tomographic colonography surveillance. (gastrohep.com)
  • CT colonography without cathartic preparation: feasibility study. (springer.com)
  • Computed tomographic colonography, fecal DNA testing, and Pillcam Colon are promising tests that need further study before they can be recommended for widespread screening. (aafp.org)
  • Dietary fecal tagging as a cleansing method before CT colonography: initial results polyp detection and patient acceptance. (springer.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. (uspreventiveservicestaskforce.org)
  • For all populations, evidence is insufficient to assess the benefits and harms of screening with computerized tomography colonography (CTC) and fecal DNA testing. (uspreventiveservicestaskforce.org)
  • Our study shows that 2-day limited bowel preparation regimen for fecal tag CT colonography is a safe and reasonable technique to evaluate the entire colon, particularly in incomplete conventional colonoscopy patients. (hindawi.com)
  • In this case report, CT colonography (CTC) demonstrated additional findings, making the diagnosis more readily achievable. (scielo.org.za)
  • Importance of extracolonic findings at IV contrast medium-enhanced CT colonography versus those at non-enhanced CT colonography. (ebscohost.com)
  • To compare the clinical importance of extracolonic findings at intravenous (IV) contrast-enhanced CT colonography versus those at non-enhanced CT colonography. (ebscohost.com)
  • Spectrum of normal findings, anatomic variants and pathology of ileocecal valve: CT colonography appearances and endoscopic correlation. (radiopaedia.org)
  • It is unclear if detection of extracolonic findings on CT colonography is a net benefit or harm. (uspreventiveservicestaskforce.org)
  • investigating the frequency and diagnostic consequences of extracolonic findings at multidetector computed tomography (MDCT) colonography. (bmj.com)
  • The authors concluded that the high prevalence of extracolonic findings may make MDCT colonography a problematic colorectal cancer screening tool for both ethical and economic reasons. (bmj.com)
  • 3 Clearly, this reduces even further the ability of CT colonography to detect and characterise extracolonic findings. (bmj.com)
  • Thus it is of paramount importance that radiologists, referring physicians, and patients are aware that CT colonography is not designed for the detection of extracolonic findings and should therefore be considered primarily as a colon examination. (bmj.com)
  • This study was aimed to evaluate the accuracy of colorectal cancer staging done using contrast-enhanced multidetector computed tomographic colonography (CEMDCTC). (bvsalud.org)
  • A 16-slice multidetector computed tomography scanner was used to generate two-dimensional multiplanar reformatted sagittal, coronal and oblique coronal images, and three-dimensional virtual colonography (endoluminal) images. (bvsalud.org)
  • IV contrast medium-enhanced (n=72) and non-enhanced (n=30) multidetector CT colonography was performed in 102 symptomatic patients. (ebscohost.com)
  • With the introduction of multidetector-row computed tomography (MD-CT), CT colonography (CTC) has gained influence as a new diagnostic tool in earl. (tum.de)
  • The National Institute for Health and Clinical Excellence (NICE) has issued full guidance to the NHS in England, Wales, Scotland and Northern Ireland on computed tomographic colonoscopy (virtual colonography). (nice.org.uk)
  • CT colonography (also known as virtual colonoscopy) has been developed as a minimally invasive alternative to conventional colonoscopy. (cmaj.ca)
  • Computed tomographic virtual colonoscopy to screen for colorectal neoplasia in asymptomatic adults. (mskcc.org)
  • With improvements in computed tomography (CT) scan resolution, virtual colonoscopy using reconstructed CT images has emerged as a potential alternative to endoscopy. (springer.com)
  • Computed tomographic colonography (virtual colonoscopy)-a multicenter comparison with standard colonoscopy for detection of colorectal neoplasia. (springer.com)
  • Computed tomographic virtual colonoscopy computer-aided polyp detection in a screening population. (springer.com)
  • Computed tomographic colonography (virtual colonoscopy): A new method for detecting colorectal neoplasms. (mayoclinic.org)
  • Virtual colonoscopy, also known as computed tomography (CT) colonography or CT colonoscopy, is a procedure to look at the lining of your large bowel. (bupa.co.uk)
  • Using other non-IV contrast abdominal or pelvic scans such as a Virtual Colonography studies, the QCT exam can be performed without requiring any further image acquisition or consequent radiation dose to the patient. (wikipedia.org)
  • The computed tomographic colonography (CTC), sometimes called a virtual colonoscopy, requires the same preparation, it's the test that's different. (cnn.com)
  • CTC, also referred to as virtual colonoscopy, uses computed tomography (CT) to acquire advanced 2-D or 3-D images for interpretation. (aapc.com)
  • How accurate is virtual colonoscopy (computed tomographic colonography) in the detection of colorectal neoplasia? (essentialevidenceplus.com)
  • Thus, this malignancy is ideally suited for screening with the goal being to detect and remove the nidus adenomatous polyp allowing for cancer prevention.CT colonography (CTC), which is also referred to as virtual colonoscopy, was first introduced in 1994 and has become increasingly disseminated worldwide as both a diagnostic test and as a screening tool for colorectal cancer. (jcancer.org)
  • A virtual colonoscopy uses computed tomography (CT) or magnetic resonance imaging (MRI) to make a three-dimensional image of the interior lining of your large intestine (colon) and rectum. (stlukesonline.org)
  • Virtual colonoscopy (also called computed tomographic colonography, or CTC) is still being studied to determine whether the results are as accurate as a regular colonoscopy . (stlukesonline.org)
  • A newer technique called computed tomographic colonography, or virtual colonoscopy, uses a CT scan instead of a scope to pick up these lesions. (nytimes.com)
  • Terminal digit preference biases polyp size measurements at endoscopy, computed tomographic colonography, and histopathology. (ox.ac.uk)
  • The aim of this study was to determine whether endoscopists, radiologists, and pathologists exhibit such bias when measuring colorectal polyp diameters.Colorectal polyp diameters measured at endoscopy, computed tomographic colonography (CTC), and histopathology were collated from a colorectal cancer screening program and two parallel multicenter randomized trials. (ox.ac.uk)
  • Analysis of air contrast barium enema, computed tomographic colonography, and colonoscopy: prospective comparison. (bmj.com)
  • Our aim was to compare the amount of residual feces, residual fluid, the tagging quality, and patient compliance using 4-day versus 2-day low fiber diet regimen in barium tagging CT colonography in incomplete colonoscopy patients. (hindawi.com)
  • Sensitivity and specificity of CT colonography in detecting individuals with advanced neoplasia (ie, advanced adenoma or CRC) 6 mm or larger. (nih.gov)
  • PurposeTo retrospectively investigate the effect of the section thickness used for quantifying dual-energy perfusion computed tomography (DEpCT) during 2- and 3-dimensional evaluation. (medworm.com)
  • The expected prevalence of adenomas, test performance characteristics of CT colonography and colonoscopy, and probability of colonoscopy complications and cancer from missed adenomas were derived from the literature. (cmaj.ca)
  • Well-designed prospective studies comparing CT colonography and colonoscopy involving patients with low lesion prevalence have recently been published. (cmaj.ca)
  • A 68-year-old obese man underwent computed tomographic colonography (CTC) scanning to investigate worsening constipation and lower abdominal discomfort on his left side. (scielo.org.za)
  • Each participant underwent CT colonography followed by colonoscopy on the same day. (nih.gov)
  • The role of computed tomographic colonography in the diagnosis of an inverted appendix is described in an adult woman, with Mayer-Rokitansky-Küster-Hauser syndrome, who underwent a laparotomy during her childhood for severe abdominal pain. (sajr.org.za)
  • Colon capsule versus CT colonography in patients with incomplete colonoscopy: a prospective, comparative trial. (semanticscholar.org)
  • This week's The New England Jornal of Medicine investigates CT colonography versus colonoscopy for the detection of advanced neoplasia. (gastrohep.com)
  • CT colonography is a radiology test that looks at the colon (large intestine). (medicalcityhospital.com)
  • CT colonography has been included as a valid option in the joint guideline for colorectal cancer screening of average-risk individuals of the American College of Radiology, the United States Multi-Society Task Force on Colorectal Cancer, and the American Cancer Society[ 3 ]. (jcancer.org)
  • The National CT colonography trial conducted by the American College of Radiology Imaging Network (ACRIN) included 2,531 asymptomatic adults at 15 study sites. (jcancer.org)
  • Computed tomography (CT) has been shown to produce the most accurate imaging in the diagnosis of Spigelian hernia. (scielo.org.za)
  • Yee J, Weinstein S, Morgan T, Alore P, Aslam R. Advances in CT Colonography for Colorectal Cancer Screening and Diagnosis. (jcancer.org)
  • Computed tomography colonography (CTC) is a minimally invasive, fast, safe and accurate screening examination for colorectal cancer. (scielo.org.za)
  • CT colonography (CTC) is a validated colorectal cancer test that provides an additional minimally-invasive screening option which is likely to be preferred by some patients. (jcancer.org)
  • To assess the accuracy of CT colonography in detecting advanced colorectal neoplasia in asymptomatic individuals at increased risk of CRC using unblinded colonoscopy as the reference standard. (nih.gov)
  • CT colonography is performed on an empty bowel. (nice.org.uk)
  • Digital subtraction bowel cleansing in CT colonography. (springer.com)
  • The widespread use of computed tomography (CT) scanning technology frequently leads to the incidental discovery of thickened bowel wall. (ebscohost.com)
  • CT colonography: accuracy, acceptance, safety and position in organised population screening. (semanticscholar.org)
  • Hara, AK 2002, ' The future of colorectal imaging: Computed tomographic colonography ', Gastroenterology Clinics of North America , vol. 31, no. 4, pp. 1045-1060. (elsevier.com)
  • Computerized tomographic colonography: performance evaluation in a retrospective multicenter setting. (springer.com)
  • American Gastroenterological Society recognizes computed tomographic colonography (CTC) as the imaging modality of choice in case of incomplete CC [ 6 ]. (hindawi.com)
  • The summary below is from the full report titled "Meta-Analysis: Computed Tomographic Colonography. (annals.org)
  • Meta-Analysis: Computed tomographic colonography. (springer.com)
  • Computed tomographic colonography: assessment of radiologist performance with and without computer-aided detection. (ox.ac.uk)
  • Computed tomographic colonography (CTC) is a screening test that looks for signs of colorectal cancer. (cigna.com)
  • BACKGROUND & AIMS To date, computed tomographic (CT) colonography has been compared with an imperfect test, colonoscopy, and has been mainly assessed in patients with positive screening test results or symptoms. (semanticscholar.org)
  • BACKGROUND:We examined the cost-effectiveness of 2- and 3-dimensional computerized tomography (CT) colonography as a screening test for colorectal neoplasia.METHODS:We created a Markov model of the natural history of colorectal cancer. (semanticscholar.org)
  • Previous cost-effectiveness analyses in the United States have concluded that a screening strategy employing CT colonography is more costly than one using colonoscopy. (cmaj.ca)
  • 16 , 17 To inform Canadian health policy, we performed an economic evaluation comparing the cost-effectiveness of CT colonography with that of colonoscopy for colorectal cancer screening. (cmaj.ca)
  • CT colonography at different radiation dose levels: feasibility of dose reduction. (springer.com)
  • We performed a pilot study examining the feasibility of a new unprepped CT colonography (CTC) strategy: low fiber diet and tagging (unprepped) vs. low fiber diet, tagging and a magnesium citrate cleansing preparation (prepped). (springer.com)
  • We assessed the feasibility of automatic, opportunistic fracture risk evaluation based on routine abdomen or chest computed tomography (CT) scans. (nature.com)
  • The researchers found 123 advanced neoplasms including 14 invasive cancers during computed tomographic colonography. (gastrohep.com)
  • In a group of persons at increased risk for CRC, CT colonography compared with colonoscopy resulted in a negative predictive value of 96.3% overall. (nih.gov)
  • Computed tomographic colonography compared with colonoscopy in patients at increased risk for colorectal cancer. (semanticscholar.org)
  • Because screening with CT colonography would cost more and result in more deaths overall compared with colonoscopy, the latter remained the dominant strategy. (cmaj.ca)
  • Computed tomographic (CT) colonography has been recognized as an alternative for colorectal cancer (CRC) screening in average-risk individuals, but less information is available on its performance in individuals at increased risk of CRC. (nih.gov)
  • Computerized tomographic (CT) colonography is a potential alternative to colonoscopy for colorectal cancer screening. (cmaj.ca)
  • We performed an economic evaluation, using decision analysis, to compare CT colonography with colonoscopy for colorectal cancer screening in patients over 50 years of age. (cmaj.ca)
  • At present, CT colonography cannot be recommended as a primary means of population-based colorectal cancer screening in Canada. (cmaj.ca)
  • Decision analysis software (DATA 3.5, TreeAge Software Inc., Williamstown, Mass.) was used to construct a model comparing CT colonography and colonoscopy for colorectal cancer screening of average-risk patients over the age of 50 years (see online Appendix 1, available at www.cmaj.ca/cgi/content/full/173/8/877/DC1 ). (cmaj.ca)
  • Computed tomography colonography (CTC) as a colorectal cancer screening option for average risk individuals age 50 and older remains a noncovered Medicare benefit. (aapc.com)
  • Thirdly, and perhaps most importantly, CT colonography has recently been demonstrated to be suitable for colorectal cancer screening purposes. (bmj.com)
  • Advantages of CT colonography include minimal invasiveness, a lower risk of complications and increased patient tolerance. (jcancer.org)
  • However, the numbers of polypectomies and complications were considerably smaller in the computed tomographic colonography group. (gastrohep.com)
  • Secondly, in order to reduce the cost and increase the safety of the examination, CT colonography is usually performed without administration of intravenous contrast material. (bmj.com)
  • It is clear that due to the use of a low dose technique and lack of intravenous contrast administration, CT colonography has even lower diagnostic ability than standard abdominal CT for assessment of disease outside the colon. (bmj.com)
  • Usefulness of CT colonography in patients with incomplete colonoscopy. (springer.com)
  • We would like to comment on the question raised by Ginnerup Pedersen et al -namely, whether MDCT colonography should be regarded as a colon examination or a sort of "Pandora's box" (if used for abdominal screening). (bmj.com)
  • Notably, a recent article has emphasised that one of the major potential advantages of MDCT colonography in comparison with all other existing colorectal diagnostic tests is its ability to detect disease outside the colon. (bmj.com)
  • It can also serve as an alternative marker for colon localization, in case of colon collapse and inability to directly compute the endoluminal centerline. (spie.org)
  • Computed tomographic colonography (computer that uses x-rays to make a picture of your intestines) every 5 years. (empowher.com)
  • Computed tomographic (CT) colonography is a diagnostic technique detecting colorectal neoplasms. (tum.de)
  • Radiologists evaluate each patient's optimal diagnostic computerized tomographic colonography (CTC) data. (knowcancer.com)