The Dassault M.D. 450 Ouragan by Kenneth G. Munson

The Dassault M.D. 450 Ouragan by Kenneth G. Munson

By Kenneth G. Munson

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6. Appendicoliths (Fig. 5): It is seen in 10 % cases on plain radiograph and 30 % on CT study. The detection of an isolated appendicolith on CT is not sufficiently specific to be the sole basis for the diagnosis of acute appendicitis [7]. The use of bone window setting can increase the detection rate of appendicolith [8]. 7. Arrowhead sign: Arrow-shaped configuration of the cecum due to funneling of intraluminal contrast into the Complications Appendiceal perforation, abscess, and sepsis are the dreaded complications of acute appendicitis.

10. 6 mm: This can be useful in diagnosis of appendicitis when no periappendiceal inflammation is present [10]. Imaging Findings on CT 1. Appendiceal caliber: 7 mm or more in width. This criterion alone does not have high positive predictive value because up to 42 % of normal population can have an appendiceal caliber of more than 7 mm. 2. Appendiceal wall thickness of more than 3 mm. 3. Appendiceal mural enhancement, homogeneous or stratified appearance of the appendiceal wall (Fig. 4). 4. Lack of intraluminal contrast in the appendix.

The duodenum is the most common site of small bowel diverticula, followed by the jejunum, with ileal diverticula being least common. Jejunal diverticula are mostly multiple and are seven times more common than ileal diverticula [7, 8]. Small bowel diverticula are most commonly detected in the elderly in the sixth and seventh decade [9]. A. S. Desser, MD Department of Radiology, Stanford University School of Medicine, Stanford, CA, USA J. Ferucci, MD Department of Radiology, University of Massachusetts Memorial Medical Center, Worcester, MA, USA Fig.

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