RATIONALE AND OBJECTIVES: The accuracy of myocardial motion measurements, computed from cine-phase contrast (cine-PC) magnetic resonance (MR) velocity data, was compared with directly visualized motion of MR signal voids caused by implanted tantalum markers in anesthetized dogs. METHODS: Magnetic resonance imaging (MRI) data were electrocardiogram-gated and divided into 16 phases per cardiac cycle. Myocardial trajectories as a function of time in the cardiac cycle were measured using both methods for four to seven markers in each of eight animals. RESULTS: The peak observed in-plane excursion was 4.0 +/- 2.1 mm. The average deviation between displacements derived from velocity data versus displacements visualized directly was 1.1 +/- 0.7 mm (27.5% of the peak displacement). The difference was less if three separate MR scans were used to measure each velocity component in the cine-PC method. This improvement is probably caused by improved temporal resolution. CONCLUSIONS: Cine-PC MRI offers a noninvasive method for accurate quantification of myocardial motion.
RATIONALE AND OBJECTIVES: The accuracy of myocardial motion measurements, computed from cine-phase contrast (cine-PC) magnetic resonance (MR) velocity data, was compared with directly visualized motion of MR signal voids caused by implanted tantalum markers in anesthetized dogs. METHODS: Magnetic resonance imaging (MRI) data were electrocardiogram-gated and divided into 16 phases per cardiac cycle. Myocardial trajectories as a function of time in the cardiac cycle were measured using both methods for four to seven markers in each of eight animals. RESULTS: The peak observed in-plane excursion was 4.0 +/- 2.1 mm. The average deviation between displacements derived from velocity data versus displacements visualized directly was 1.1 +/- 0.7 mm (27.5% of the peak displacement). The difference was less if three separate MR scans were used to measure each velocity component in the cine-PC method. This improvement is probably caused by improved temporal resolution. CONCLUSIONS:Cine-PC MRI offers a noninvasive method for accurate quantification of myocardial motion.
Authors: M G D Karlsson; L Hübbert; U Lönn; B Janerot-Sjöberg; H Casimir-Ahn; K Wårdell Journal: Med Biol Eng Comput Date: 2004-11 Impact factor: 2.602
Authors: Yuchi Han; Dana C Peters; Kraig V Kissinger; Beth Goddu; Susan B Yeon; Warren J Manning; Reza Nezafat Journal: Am J Cardiol Date: 2010-07-15 Impact factor: 2.778