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Imaging longitudinal cardiac strain on short-axis images using strain-encoded MRI

  1. Nael F. Osman1,*,
  2. Smita Sampath2,
  3. Ergin Atalar1,
  4. Jerry L. Prince2

Article first published online: 24 JUL 2001

DOI: 10.1002/mrm.1195

Issue

Magnetic Resonance in Medicine

Magnetic Resonance in Medicine

Volume 46, Issue 2, pages 324–334, August 2001

Additional Information

How to Cite

Osman, N. F., Sampath, S., Atalar, E. and Prince, J. L. (2001), Imaging longitudinal cardiac strain on short-axis images using strain-encoded MRI. Magnetic Resonance in Medicine, 46: 324–334. doi: 10.1002/mrm.1195

Author Information

  1. 1

    Department of Radiology, The Johns Hopkins University, Baltimore, Maryland

  2. 2

    Center for Imaging Science, Department of Electrical and Computer Engineering, The Johns Hopkins University, Baltimore, Maryland

*Department of Radiology, Johns Hopkins University, 601 N. Caroline St., Room 4243, Baltimore, MD 21287-0845

Publication History

  1. Issue published online: 24 JUL 2001
  2. Article first published online: 24 JUL 2001
  3. Manuscript Accepted: 16 FEB 2001
  4. Manuscript Revised: 13 FEB 2001
  5. Manuscript Received: 18 JUL 2000

Funded by

  • National Heart, Lung, and Blood Institute. Grant Number: R01HL4705

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Keywords:

  • cardiac motion;
  • harmonic phase;
  • magnetic resonance tagging;
  • myocardial strain

Abstract

This article presents a new method for measuring longitudinal strain in a short-axis section of the heart using harmonic phase magnetic resonance imaging (HARP-MRI). The heart is tagged using 1-1 SPAMM at end-diastole with tag surfaces parallel to a short-axis imaging plane. Two or more images are acquired such that the images have different phase encodings in a direction orthogonal to the image plane. A dense map of the longitudinal strain can be computed from these images using a simple, fast computation. Simulations are conducted to study the effect of noise and the choice of out-of-plane phase encoding values. Longitudinal strains acquired from a normal human male are shown. Magn Reson Med 46:324-334, 20001. © 2001 Wiley-Liss, Inc.

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