Published online before print October 2, 2002, 10.1148/radiol.2252011551
(Radiology 2002;225:400.)
A more recent version of this article appeared on November 1, 2002
Frequency of Visualization and Thickness of Normal Appendix at Nonenhanced Helical CT1
Ofer Benjaminov, MD,
Mostafa Atri, MD, FRCPC,
Paul Hamilton, MD, FRCPC and
Daniel Rappaport, MD, FRCPC
1 From the Sunnybrook and Women’s College Health Sciences Centre (O.B., M.A., P.H.), Mount Sinai Hospital (D.R.), and University Health Network (D.R.), University of Toronto, 2075 Bayview Ave, Toronto, Ontario, Canada M4N 3M5. Received September 18, 2001; revision requested October 25; final revision received March 18, 2002; accepted March 25. Address correspondence to M.A. (e-mail: mostafa.atri@swchsc.on.ca).
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Figure 1a. Transverse nonenhanced helical CT scans of the abdomen in two patients. (a) The thickness of the wall of the appendix without content is measured by means of subtracting the thickness of air content (arrowheads) from the full thickness (straight arrows). The more distal part of the appendix contains high-attenuation, presumably proteinacious, material (curved arrow). (b) The full thickness of the appendix (arrows) is measured, since the content is not recognizable. This appendix is 8 mm thick.
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Figure 1b. Transverse nonenhanced helical CT scans of the abdomen in two patients. (a) The thickness of the wall of the appendix without content is measured by means of subtracting the thickness of air content (arrowheads) from the full thickness (straight arrows). The more distal part of the appendix contains high-attenuation, presumably proteinacious, material (curved arrow). (b) The full thickness of the appendix (arrows) is measured, since the content is not recognizable. This appendix is 8 mm thick.
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Figure 2a. Transverse nonenhanced helical CT scans of the abdomen show different locations of the appendiceal tip (arrow). (a) The appendix extends along the ascending colon (C), with its tip in a paracolic location, inferior to the tip of the right lobe of the liver (L). (b) The appendix extends into the pelvis. (c) The appendix extends medially, with the tip located in the midline. (d) A retrocecal appendix is located posterior to the cecum (C).
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Figure 2b. Transverse nonenhanced helical CT scans of the abdomen show different locations of the appendiceal tip (arrow). (a) The appendix extends along the ascending colon (C), with its tip in a paracolic location, inferior to the tip of the right lobe of the liver (L). (b) The appendix extends into the pelvis. (c) The appendix extends medially, with the tip located in the midline. (d) A retrocecal appendix is located posterior to the cecum (C).
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Figure 2c. Transverse nonenhanced helical CT scans of the abdomen show different locations of the appendiceal tip (arrow). (a) The appendix extends along the ascending colon (C), with its tip in a paracolic location, inferior to the tip of the right lobe of the liver (L). (b) The appendix extends into the pelvis. (c) The appendix extends medially, with the tip located in the midline. (d) A retrocecal appendix is located posterior to the cecum (C).
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Figure 2d. Transverse nonenhanced helical CT scans of the abdomen show different locations of the appendiceal tip (arrow). (a) The appendix extends along the ascending colon (C), with its tip in a paracolic location, inferior to the tip of the right lobe of the liver (L). (b) The appendix extends into the pelvis. (c) The appendix extends medially, with the tip located in the midline. (d) A retrocecal appendix is located posterior to the cecum (C).
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Copyright © 2002 by the Radiological Society of North America.
