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Volume-rendered 3D CT of the Mesenteric Vasculature: Normal Anatomy, Anatomic Variants, and Pathologic Conditions¹

¹ From the Department of Radiology, Johns Hopkins Medical Institutions, 601 N Caroline St, Baltimore, MD 21287. Presented as an educational exhibit at the 2000 RSNA scientific assembly. Received April 11, 2001; revision requested July 3 and received July 17; accepted July 18. Address correspondence to E.K.F. (e-mail: efishman@jhmi.edu).

Multi–detector row computed tomography (CT) offers important advantages over more conventional imaging methods in the evaluation of the mesenteric vasculature. It allows faster scanning, which practically eliminates motion and breathing artifacts, as well as thinner collimation. These advances, coupled with rapid intravenous administration of contrast material, allow excellent opacification of the mesenteric arteries and veins. This improves the quality of the three-dimensional (3D) data sets, which in turn leads to improved 3D vascular maps and more accurate assessment of various conditions such as arterial or venous encasement in patients with pancreatic cancer, mesenteric ischemia, or inflammatory bowel disease. Three-dimensional multi–detector row CT also allows better visualization of arterial and venous branching, thereby improving detection of more distal vascular involvement. In addition, 3D multi–detector row CT may help detect hemodynamic changes in patients with active inflammation and hyperemia of a bowel segment because it can be used to measure bowel wall enhancement over time. Carcinoid tumors that have infiltrated the mesentery have a characteristic CT appearance, and other conditions such as lymphoma or sclerosing mesenteritis can also manifest as an infiltrating mass that envelops mesenteric vessels. Three-dimensional multi–detector row CT represents a significant advance in CT technology and can help ensure prompt, accurate evaluation of the mesenteric vasculature.

© RSNA, 2002

Index Terms: Arteries, mesenteric, 95.1291, 95.92 • Computed tomography (CT), angiography, 95.12916 • Computed tomography (CT), thin-section, 95.1291 Computed tomography (CT), three-dimensional, 95.12917 • Computed tomography (CT), volume rendering, 95.12917 • Veins, mesenteric, 95.1291, 95.92

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