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Updated: May 13, 2026

Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging
Published on: December 9, 2021
Computed tomography angiography gravitational gradient as an imaging sign of slow flow
Michael Hanley1, Dimitrios Mitsouras, Michael L Steigner
1Thoraco-Abdominal Imaging, University of Virginia Health System, Charlottesville, VA, USA.
Abstract:
Intraluminal layering of iodinated contrast on a single axial computed tomography image is described as a possible sign of slow arterial flow and is quantified using a new region of interest-based metric, that is, gravitational gradient. The metric was measured in 4 patients who demonstrated this phenomenon and in the aorta of 10 patients with no clinical sign suggestive of slow flow. Future studies are needed to validate the relationship between gravitational gradient, slow flow, and patient outcome.
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