3D cardiovascular MR imaging at ultra-high field (7T) is very challenging due to magnetic-field inhomogeneity (B0 and B1), SAR constraints and also the coil-depth issues of surface coils. To our best knowledge this is the first report demonstrating contrast-free ultra-high resolution (0.7mm3 isotropic) free-breathing 3D CMRA images with translational respiratory motion compensation. To avoid SAR constraints imposed by the use of T2-preparation pulses, high excitation flip-angles are exploited to obtain high contrast between the coronary arteries and myocardium. This technique may be adopted for clinical applications to produce high-resolution cardiac MR images at 7T scanners.
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