Variable density k-space strategies using multiple echoes are used to dramatically increase the capabilities of MR for fast functional cardiac imaging and coronary imaging within a breath-hold. Here the density compensation methods developed earlier for vascular imaging are used to depict the myocardium, cardiac chambers and coronary arteries throughout the cardiac cycle without a contrast injection. Methods to utilize multiple-echo trajectories with robust image quality are shown in each cardiac application. The ability to visualize both the coronary lumen and the epicardial fat bed in which the coronaries lie are demonstrated for the first time.Image contrasts among different types of tissues can be obtained by accentuating differences between these ... Due to this non-geometric acquisition constraint, MR is relatively slow compared to other imaging modalities, which limitsanbsp;...
|Title||:||Variable-density MRI K-space Scanning|
|Publisher||:||ProQuest - 2008|