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The Scientific World Journal
Volume 2012, Article ID 194069, 7 pages
http://dx.doi.org/10.1100/2012/194069
Review Article

T2-Weighted Cardiac Magnetic Resonance Imaging of Edema in Myocardial Diseases

1Department of Radiology, Nippon Medical School, 1-1-5 Senadagi, Bunkyo-ku, Tokyo 113-8603, Japan
2Department of the 1st Internal Medicine, Nippon Medical School, 1-1-5 Senadagi, Bunkyo-ku, Tokyo 113-8603, Japan

Received 17 June 2012; Accepted 29 July 2012

Academic Editors: J. W. Goldfarb and M. Karcaaltincaba

Copyright © 2012 Yasuo Amano et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The purpose of this paper is to describe imaging techniques and findings of T2-weighted magnetic resonance imaging (MRI) of edema in myocardial diseases. T2-weighted cardiac MRI is acquired by combining acceleration techniques with motion and signal suppression techniques. The MRI findings should be interpreted based on coronary artery supply, intramural distribution, and comparison with delayed-enhancement MRI. In acute myocardial diseases, such as acute myocardial infarction and myocarditis, the edema is larger than myocardial scarring, whereas the edema can be smaller than the scarring in some types of nonischemic cardiomyopathy, including hypertrophic cardiomyopathy. T2-weighted MRI of edema identifies myocardial edema associated with ischemia, inflammation, vasculitis, or intervention in the myocardium and provides information complementary to delayed-enhancement MRI.