Atlas of Virtual Colonoscopy by David J. Vining (auth.), Abraham H. Dachman MD (eds.) PDF
By David J. Vining (auth.), Abraham H. Dachman MD (eds.)
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Additional info for Atlas of Virtual Colonoscopy
Several workstations allow a simulation of a double-contrast barium enema image, which allows a quick overview of how well the colon is distended to facilitate polyp location (probably with greater accuracy than colonoscopy). 27 4. 10. Sixty-five-year-old man undergoing virtual colonoscopy with partially constricting adenocarcinoma. (A) 3D endolurninal view of sigmoid colon shows irregular folds in the colon (long arrows). Note rectal catheter in background (short arrow). (B) Sagittal image shows better the "apple-core" appearance of the neoplasm (arrow).
4). However, careful inspection of MPR and endoluminal images usually allows differentiation of linear (fold) morphology from true polypoid morphology. 5), linear morphology is indicative of a fold. On occasion, bulbous folds can be difficult to differentiate from polyps. If there is concern, and the lesion is of substantial size (as measured on the 2D image), colonoscopy is recommended for differentiation in these cases. 13A). ; Fenlon et al. 1998). 13B). When a diverticulum is impacted with fecal material, it may appear raised, mimicking a polyp.
On occasion, bulbous folds can be difficult to differentiate from polyps. If there is concern, and the lesion is of substantial size (as measured on the 2D image), colonoscopy is recommended for differentiation in these cases. 13A). ; Fenlon et al. 1998). 13B). When a diverticulum is impacted with fecal material, it may appear raised, mimicking a polyp. 13. Diverticulum on endoluminal view (left) shows a complete ring around the diverticulum (arrow). The image on the right confinns the colonoscopic view of the same diverticulum (arrow).
Atlas of Virtual Colonoscopy by David J. Vining (auth.), Abraham H. Dachman MD (eds.)