نتایج جستجو برای: ct colonography
تعداد نتایج: 135985 فیلتر نتایج به سال:
BACKGROUND Computerized tomographic (CT) colonography is a potential alternative to colonoscopy for colorectal cancer screening. Its main advantage, a better safety profile, may be offset by its limitations: lower sensitivity, need for colonoscopy in cases where results are positive, and expense. METHODS We performed an economic evaluation, using decision analysis, to compare CT colonography ...
OBJECTIVE To determine the efficacy and effectiveness of CT colonography in comparison with those of colonoscopy in screening for colorectal cancer. MATERIAL AND METHODS We systematically reviewed all the studies in the scientific literature that assessed the efficacy of CT colonography in screening for colorectal cancer. We excluded articles that assessed the efficacy of other screening tech...
BACKGROUND Pain is common during colonic insufflation required for CT colonography. We therefore evaluate whether a single intravenous alfentanil bolus has a clinically relevant analgesic effect compared with placebo in patients undergoing CT colonography. METHODS A prospective multi-centre randomised double-blind placebo-controlled trial was performed in patients scheduled for elective CT co...
Computed tomography colonography (CT colonography) is one of the latest radiological methods of colorectal diagnostic imaging. Many studies confirmed a high efficacy of CT colonography in diagnosing colorectal polyps and tumors. However, this imaging method is not devoid of false diagnoses. Our paper presented the main causes of false results, causes of heterogeneity of the results among centre...
CT colonography has been shown to be an effective method to screen for colorectal cancer. However, at present, full endorsement and reimbursement for screening CT colonography, particularly by the US Preventive Services Task Force and CMS, respectively, are absent, so this screening option is infrequently used, and optical colonoscopy remains the de facto standard screening option. The authors ...
BACKGROUND Colon cancer is a leading cause of morbidity and mortality in developed countries. The early detection of colorectal cancer using screening programs is important for managing early-stage colorectal cancers and polyps. Modalities that allow examination of the entire colon are conventional colonoscopy, double contrast barium enema examination and multi-detector computed tomography (MDC...
A 58-year-old woman presented to her physician with rectal bleeding and intermittent diarrhea. Optical colonoscopy revealed a bulky tumor which was diagnosed as rectal cancer. She was referred to our institution for further evaluation and treatment. Slim optical colonoscopy showed an obstructive cancer in the rectosigmoid junction and no information of the proximal side of the obstruction. The ...
BACKGROUND Computed tomographic (CT) colonography is a noninvasive option in screening for colorectal cancer. However, its accuracy as a screening tool in asymptomatic adults has not been well defined. METHODS We recruited 2600 asymptomatic study participants, 50 years of age or older, at 15 study centers. CT colonographic images were acquired with the use of standard bowel preparation, stool...
PURPOSE To investigate the sensitivity and specificity of polyp detection and the image quality of computed tomographic (CT) colonography at different radiation dose levels and to study effective doses reported in literature on CT colonography. MATERIALS AND METHODS CT colonography and colonoscopy were performed with 100 mAs in 50 consecutive patients at high risk for colorectal cancer; 50- a...
We aimed to establish a reliable procedure allowing the follow-up of tumor development by computed tomographic (CT) colonography in an animal model of colon carcinogenesis in order to assess the chemopreventive efficacy of aspirin and difluoromethylornithine (DFMO) given in combination. Fischer rats received an intraperitoneal injection (25 mg/kg) of dimethylhydrazine (DMH) once a week for two ...
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