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Abstract #0599

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

MAGNA25Christian Buerger1, Claudia Prieto1, 2, Andrew Peter King1, Tobias Schaeffter1

1Division of Imaging Sciences and Biomedical Engineering, King's College London, London, Westminster, United Kingdom; 2Escuela de Ingeniera, Pontificia Universidad Catlica de Chile, Santiago, Chile

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.

Keywords

abdomen abdominal according accuracy achieve achieved achieves acquisition acquisitions additionally address affine allow allows amount apparent appearance applied arbitrary around artifacts averaging balanced bins breathing channel coil collected college combination combined combines common commonly compensated compensates compensation composite composition compute computed considered contribution corrected coverage cycle dataset decreased deformations deformed derived deriving distribution division efficiency efficient employed encoding engineering estimation exhale exploited fair field final flexible form free gated gating golden healthy heart highly improvement include indicated inhale isotropic iterative king kingdom leading leads like liver measured media might model modeling motion nearly optimizing overall pattern peter placed portion position positions predefined produces propose proposed quality radial reached read recently reconstruct reconstruction reconstructions reduced reduction registration registrations resolution respiratory retrospective rigid samples sampling scanned scanner self sense separated sharpness short since slice slightly sorting space spoke spokes strategies successor suitability terms trajectory variations vary varying view visited volunteer volunteers whole words