Highly Efficient Motion Corrected 3D Liver MRI from Undersampled G-RPE Acquisitions

Christian Buerger¹, Claudia Prieto¹, ², Andrew Peter King¹, Tobias Schaeffter¹

We propose a method to reconstruct motion compensated 3D MRI of the abdomen acquired during free-breathing with nearly 100% scan efficiency. The approach is based on a self-gated Golden-Radial Phase Encoding sampling that allows reconstruction of multiple undersampled 3D images at different respiratory positions. Non-rigid image registrations are employed to combine all images into one high quality motion compensated dataset. The highly efficient technique allows reconstruction of 3D liver MRI with a high isotropic resolution of 1.75mm. Compared to a commonly employed gating technique overall scan time is reduced by 56% while similar image quality is preserved.