| Autor: |
Nehrke, Kay, Börnert, Peter, Mazurkewitz, Peter, Winkelmann, Richard, Gräßlin, Ingmar |
| Zdroj: |
Journal of Magnetic Resonance Imaging; May2006, Vol. 23 Issue 5, p752-756, 5p |
| Abstrakt: |
Purpose To set up a robust and patient-friendly whole-heart protocol based on 32-receive-channel technology that will potentially allow a large part of the patient population to be addressed. Materials and Methods Ten volunteers were examined on a clinical 1.5 T scanner equipped with a 32-channel data acquisition system using an experimental 32-element coil array. A magnetization-prepared, navigator-gated and -tracked 3D Cartesian balanced FFE sequence was used for whole-heart coronary MR angiography (MRA). With the use of sensitivity encoding (SENSE) and partial Fourier encoding for scan acceleration, nearly isotropic high-resolution data sets were acquired during free breathing in four minutes. Results A high contrast and sufficient signal-to-noise ratio (SNR) were obtained, which allowed visualization of the major vessels up to the distal regions and detection of major branches. Phase encoding in the anterior-posterior (AP) direction was the most favorable SENSE configuration and allowed a reasonable scan time reduction with moderate SENSE factors. Conclusion The employed 32-receive channel technology enabled a robust trade-off among SNR, spatial resolution, and scan time. In this study the most robust results were obtained using the smallest possible SENSE factors for a given voxel size and scan time. J. Magn. Reson. Imaging 2006. © 2006 Wiley-Liss, Inc. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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