Editorial Reviews. Review. Master virtual colonoscopy. About the Author. University of Wisconsin School of Medicine and Public Health Madison, WI USA. Request PDF on ResearchGate | On May 1, , Ged R. Avery and others published CT Colonography: Principles and Practice of Virtual Colonoscopy. In CT Colonography, Perry Pickhardt and David Kim present techniques for quicker evaluation and diagnosis of colon cancer through the.
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A focal soft tissue protuberance on or adjacent to a fatty valve is suspicious for a true polyp Fig. In this review, we have covered a wide array of potential pitfalls at CTC interpretation.
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Adenomatous polyp obscured by small-caliber rectal catheter at low-dose CT colonography: Potential pitfalls related to technique Retained solid fecal material. Can the CT scout reliably assess for adequate colonic distention at CT colonography? Large cecal carpet lesion laterally spreading tumor Supine transverse 2D A and B and 3D endoluminal C CTC images show a large flat soft tissue mass arrowheads opposite the ileocecal valve arrow that has a somewhat lobulated appearance and results in fold distortion on 3D.
Practical Pelvic Floor Ultrasonography.
The prevalence and clinical relevance of flat colonic lesions have been the source of great debate. This proved to be a tubular adenoma after resection at OC E.
Hypertrophied anal papillae represent focal fibrous protrusions at the dentate line that dolonography represent internal skin tags. Given its polypoid or mass-like appearance, confident assessment of the ileocecal valve at CTC seems to be an initial concern for many novice readers.
Fold thickening at CTC is largely due to inadequate luminal distention, underlying diverticular disease, or a combination of the two. Additional anorectal pathology that can be encountered at CTC is discussed in more detail elsewhere. See other articles in PMC that cite the published article. Note the lack of motion or artifacts elsewhere on the image. Advanced Colonoscopy co,onoscopy Endoluminal Surgery.
PickhardtDavid H. As with the ileocecal valve, the vermiform appendix represents another anatomic structure that can give rise to a number of unique findings at CTC interpretation, most notably ivrtual polyps and appendiceal neoplasms.
CT Colonography: Pitfalls in Interpretation
No, cancel Yes, report it Thanks! Tube current modulation can avoid this discordance by boosting the mA only as needed to maintain a static noise level.
Tagged stool mimicking a flat polyp on 3D 3D endoluminal CTC image A shows an elongated flat lesion on a colonic fold. Streak artifact across the rectum is also apparent on the 3D endoluminal view C.
Synopsis As with any radiologic imaging test, there are a number of potential interpretive pitfalls at CT colonography CTC that need to be recognized and handled appropriately. The prone view had a similar appearance not shown. In contrast to hemorrhoids, rectal varices have a tubular, serpiginous appearance. Presents tips from the authors on setting up a VC practice to provide a personal, instructive guide.
Perhaps colonogarphy single most important step in learning to avoid most of these diagnostic traps is simply to be aware of their existence. Computed tomographic virtual colonoscopy to screen for colorectal neoplasia in asymptomatic adults. Utility of intravenously administered contrast material at CT colonography. Transverse 2D CTC images with polyp A and soft tissue B window settings show a multi-lobulated mass occupying the expected location of the ileocecal valve.
Online assessment of the 2D prjnciples for adequate left-sided distention during CTC examination should be made by the technologist at the CT console because the scout view alone can be unreliable or misleading.
CT Colonography: Pitfalls in Interpretation
Current Management of Venous Diseases. Oral contrast adherence to polyps on CT colonography.
Open in a separate window. At rpactice Dthe preservation of the overlying colonic fold is a sign that the lesion is caused by extrinsic impression. Journal of Computer Assisted Tomography. Subsequent CTC trials adding primary 3D detection alongside 2D review showed markedly improved sensitivity for polyps. Diagnostic performance of primary 3-dimensional computed tomography colonography in the setting of colonic diverticular disease. Complementary shifting of prsctice fluid between supine and prone positioning at CT colonography: