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Abstract #3816

Respiratory Self-Gating with 3D-Translation Compensation for Whole-Heart Coronary MRA

Peng Lai1, Xiaoming Bi2, Renate Jerecic2, Debiao Li1

1Departments of Biomedical Engineering and Radiology, Northwestern University, Chicago, IL, USA; 2Siemens Medical Solutions, Chicago, IL, USA

Conventional respiratory gating methods, e.g. NAV and respiratory self-gating (RSG), detect SI translation of the heart only, resulting in residual motion artifacts. This work developed a new 3D RSG method capable of detecting 3D heart translation in real-time was for whole-heart coronary MRA. Coronary imaging was performed on 9 volunteers with both NAV and 3D RSG signals acquired. Images were reconstructed using different motion correction methods and compared based on vessel delineation. Our results showed that 3D RSG improved coronary artery depiction compared to conventional methods. 3D RSG is a promising technique for improving the robustness of whole-heart coronary MRA.