The Dean Effect: An Aortic Arch Flow Artifact Mimicking Dissection

Overview

Journal Radiol Cardiothorac Imaging

Specialty Cardiology & Vascular Diseases

Date 2022 Jul 5

PMID 35782762

Authors

Alan Ropp

Aletta A Frazier

Bradley Gelfand

Jean Jeudy

Affiliations

Soon will be listed here.

Abstract

The unique hemodynamics of the aortic arch create conditions for potential formation of a flow-related artifact that mimics disease on CT angiographic images. The hemodynamic basis for this artifact can be explained by fluid mechanics incorporating a mathematical principle known as the . Therefore, in this review, the artifact is referred to as the . It is important for radiologists and other clinicians to recognize this artifact when encountered. It is also helpful for the interpreting radiologist to have a basic understanding of the relevant hemodynamic principles. This review provides an example of the artifact, reviews the basic underlying hemodynamics, and presents methods of how to prevent this artifact and distinguish it from pathologic mimics in clinical practice. CT Angiography, Vascular, Thorax, Aorta, Artifacts, Blood, Dissection, Hemodynamics/Flow Dynamics © RSNA, 2022.

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