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.
|Published (Last):||25 February 2005|
|PDF File Size:||1.18 Mb|
|ePub File Size:||12.21 Mb|
|Price:||Free* [*Free Regsitration Required]|
Synopsis As with any radiologic imaging test, there are a number of potential interpretive pitfalls at CT colonography CTC that need to be virthal and handled appropriately. Linear and volumetric measurement at CT colonography.
Fortunately for CTC, there are a number of factors that further reduce the concern for radiation. Elsevier Health Sciences Amazon. Electronic cleansing and stool tagging in CT colonography: In these cases, continuity of the remainder of the appendix in its expected location prevents misdiagnosis. Essential Applications of Musculoskeletal Ultrasound in Rheumatology.
Tagged prjnciples stool simulating a sessile polyp on 3D 3D endoluminal CTC image A shows a polypoid lesion, as well as smaller adjacent diminutive foci. In many ways, the anorectal region represents the most important source of pitfalls at CTC, since common incidental findings may distract the reader from important colonoscpy pathology, which may be relatively subtle due its specific location.
Anesthesia Student Survival Guide.
CT Colonography: Pitfalls in Interpretation
The first key is awareness of anorectal-specific pathology. When advanced or thrombosed, internal hemorrhoids may appear polypoid or mass-like at CTC Fig. Streak artifact across the rectum is also apparent on the 3D endoluminal view C.
The prone images had a similar appearance not shown.
Your display name should be at least 2 characters long. Ileocecal Valve Pitfalls 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. At CTC, specific definitive diagnosis can be made in the case of submucosal lipomas, pneumatosis, and extrinsic impression from extracolonic structures.
Over-sizing diminutive lesions on 3D is a common pitfall that can lead to over-aggressive management if not carefully correlated with the 2D polyp size. Radiation risk in perspective: In actual practice, the true challenges may come from cases in which more than one pitfall intersects on the same case. Note how the lesion is barely perceptible on the soft tissue window setting D.
Although we initially performed electronic cleansing on the tagged fluid prior to interpretation very early on in our CTC experience, we discontinued this practice in due to the troublesome artifacts that were introduced discussed later.
Hypertrophied anal papillae represent focal fibrous prinnciples at the dentate line that essentially represent internal skin tags. With a fixed mA low-dose technique, image noise can be accentuated inferiorly due to the bony pelvis but may be unnecessarily low for the upper abdomen. Close Report a review At Kobo, we try to ensure that published reviews do not contain rude or profane language, spoilers, or any of our reviewer’s personal information.
PickhardtMD and Dt H. This carpet lesion was confirmed at same-day optical colonoscopy D and proved to be a tubulovillous adenoma.
CT Colonography: Pitfalls in Interpretation
Interventional Cardiology, Second Edition. This proved to be a tubular adenoma after resection at OC E. We have tried to indicate which pitfalls can be avoided altogether, as well as those that cannot always be avoided but should be recognized as such to prevent mismanagement. A more extensive review with hundreds of illustrations can be found in our principoes referenced textbook.
American Journal of Roentgenology.
There was a problem providing the content you requested
This combination of sophisticated X-rays and CT scans of the abdomen offers patients an alternative Principles and Practice of Prindiples Colonoscopy. Perhaps the most significant dose reduction prihciples come from the implementation of the newer iterative reconstructions techniques, some of which allow for routine sub-mSv scanning for CTC Fig. Flat lesion obscured by densely opacified fluid on soft tissue windows Prone transverse 2D CTC image with polyp windowing A shows a flat cecal polyp arrowheadwhich is submerged under opacified fluid but is nonetheless detectable.
Beam-hardening artifacts related to metallic objects such as spinal hardware or hip prostheses are pracitce by the low-dose CTC technique Fig. Brain Imaging in Behavioral Neuroscience. Complementary shifting of luminal fluid between supine and prone positioning at CT colonography: For suspected polyps approaching 5—6 mm or greater detected at CTC, we recommend performing a careful combined 2D and 3D size assessment.
Frankly inverted diverticula are relatively rare but represent a related pitfall.
National Center for Biotechnology InformationU.