Whole-heart water/fat coronary MR angiography (CMRA) is a promising technique for improved visualisation of the cardiac anatomy and epicardial and pericardial fat. However, respiratory motion remains a challenge for its integration into clinical routine. Here we propose a respiratory motion-corrected whole-heart water/fat CMRA approach based on dual-echo 2D image navigators (iNAVs) and a combined 2D translational and 3D non-rigid motion corrected reconstruction scheme. Results from healthy subjects indicate that out-of-phase iNAVs produce accurate respiratory translational motion estimation, and that motion-corrected water/fat CMRA images are comparable to reference diaphragmatic-gated images, but are acquired in a significantly shorter scan time.
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