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Simultaneous MRI tagging and through-plane velocity quantification: a three-dimensional myocardial motion tracking

J P Kuijer¹, J T Marcus, M J Götte

¹Department of Clinical Physics and Informatics, Vrije Universiteit, Amsterdam, The Netherlands. jpa.kuijer@azvu.nl

Journal of Magnetic Resonance Imaging : JMRI

|April 9, 1999

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A new algorithm accurately tracks 3D myocardial motion using simultaneous MRI tagging and velocity quantification. This method offers a competitive approach for assessing cardiac motion in healthy volunteers.

Area of Science:

Cardiovascular Imaging
Biomedical Engineering
Medical Physics

Background:

Accurate assessment of myocardial motion is crucial for diagnosing cardiac conditions.
Existing methods for quantifying 3D cardiac motion have limitations.

Purpose of the Study:

To develop and evaluate a novel algorithm for calculating 3D point-specific myocardial motion.
To assess the performance of an algorithm combining magnetic resonance imaging (MRI) grid tagging and through-plane velocity quantification.

Main Methods:

Developed a tracking algorithm integrating in-plane motion from MRI tagging grids and through-plane motion from velocity quantification.
Evaluated the algorithm's in vivo performance in four healthy volunteers using long-axis images.
Compared systolic through-plane displacement with displacements of tagging-grid intersections.

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Main Results:

Achieved a high correlation coefficient of 0.93 (P < 0.001) between the algorithm's output and measured displacements.
Observed a small, statistically significant underestimation of through-plane displacement by 0.04 +/- 0.09 cm (P < 0.001).
The average displacement measured was 0.77 +/- 0.23 cm toward the apex.

Conclusions:

The developed 3D point-specific motion tracking algorithm is competitive with existing techniques.
Simultaneous tagging and velocity quantification provide a robust method for assessing cardiac motion.
This approach shows promise for clinical applications in cardiovascular imaging.