Radiology, Vol 180, 677-683, Copyright © 1991 by Radiological Society of North America

ARTICLES

Noninvasive measurement of transmural gradients in myocardial strain with MR imaging

ER McVeigh and EA Zerhouni
Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD 21205.

A method is presented for performing high-resolution strain measurements by using magnetic resonance (MR) tagging. Multispectral radiofrequency pulses are used to produce tagging grids from which strain estimates are obtained with a resolution of 2 mm. A tag detection algorithm is presented that measures the center of a tag line with a precision that ranges from 0.1 to 0.2 mm over the systolic interval. With this method, a transmural gradient in the strain of a normal dog heart was detected.

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