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Radiology. 1995 Jun;195(3):829-35.

Three-dimensional myocardial deformations: calculation with displacement field fitting to tagged MR images.

Author information

1
Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.

Abstract

PURPOSE:

To reconstruct three-dimensional (3D) myocardial deformations from orthogonal sets of parallel-tagged magnetic resonance (MR) images.

MATERIALS AND METHODS:

Displacement information in the direction normal to the undeformed tag planes was obtained at points along tag lines. Three independent sets of one-dimensional displacement data were used to fit an analytical series expression to describe 3D displacement as a function of deformed position. The technique was demonstrated with computer-generated models of the deformed left ventricle with data from healthy human volunteers.

RESULTS:

Model deformations were reconstructed with a 3D tracking error of less than 0.3 mm. Error between estimated and observed one-dimensional displacements along the tags in 10 human subjects was 0.00 mm +/- 0.36 (mean +/- standard deviation). Robustness to noise in the tag displacement data was demonstrated by using a Monte Carlo simulation.

CONCLUSION:

The combination of rapidly acquired parallel-tagged MR images and field-fitting analysis is a valuable tool in cardiac mechanics research and in the clinical assessment of cardiac mechanical function.

PMID:
7754016
PMCID:
PMC2396322
DOI:
10.1148/radiology.195.3.7754016
[Indexed for MEDLINE]
Free PMC Article

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