Mesenteric CT Angiography: A Discussion of Techniques and Selected Applications

Sixty-four slice MDCT with advanced three-dimensional (3D) visualization software provides a unique opportunity for noninvasive evaluation of the mesenteric vasculature. Although standard axial computed tomography (CT) scanning has always allowed identification of the mesenteric arteries and veins, it is limited in its ability to adequately image small branches and complex anatomy. However, the submillimeter collimation possible with 64-slice CT scanners now allows the acquisition of true isotropic data and therefore high spatial resolution is now maintained in any imaging plane. This ability to visualize the mesenteric vasculature in real-time using 3D rendering and multiplanar reconstruction is crucial for comprehensive review of the complex mesenteric vessels. In this article, we discuss CT scanning protocols and 3D imaging techniques that can be utilized for CT angiography of the mesenteric vessels. Additionally, we will discuss several key conditions that illustrate the value of 3D imaging over standard axial images in mesenteric CT angiography.

Keywords: CT angiography, mesenteric vasculature, 64-slice MDCT, SMA syndrome, median arcuate ligament syndrome, mesenteric artery aneurysms