Hybrid dante and phase-contrast imaging technique for measurement of three- dimensional myocardial wall motion
✍ Scribed by William H. Perman; Lawrence L. Creswell; Stephan G. Wyers; Michael J. Moulton; Michael K. Pasque
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 798 KB
- Volume
- 5
- Category
- Article
- ISSN
- 1053-1807
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✦ Synopsis
Characterization of myocardial stress and strain is necessary for a complete understanding of myocardial function. The precise quantification of regional myocardial strain is complicated by its time-varying pattern and reglonal varfation resulting from the anisotropy of the myocardium and by complex torsional and shortening motions of the heart during the cardiac cycle. The authors have developed a technique for point-specific tracking of myocardial motion along all three axes in a constant selected section of myocardium by combining prospective section selection with in-plane DANTE (delays alternating with nutations for tailored excitation) tissue tagging and phase-contrast detection of motion perpendicular to the image plane. With this technique, it 1s possible to determine pointspecific myocardial strain values in vivo.
A COMPLETE understanding of myocardial function requires the characterization of regional myocardial strain in vivo. The precise quantification of regional myocardial strain is complicated by the time-varying pattern of regional strain and the regional variation in strain resulting from the marked anisotropy of the myocardium. Techniques previously used to quantify strain have included the trans-cycle tracking of specific epicardial anatomic features (1) (coronary artery branch points) or surgically placed marker beads (2). These approaches are limited because they are based on a small set of nonuniformly distributed tracking points.