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Abstract #3685

Improved motion compensated reconstruction for 3D abdominal MRI using a self-navigated non-rigid motion model

Gastao Cruz 1 , David Atkinson 2 , Tobias Schaeffter 1 , and Claudia Prieto 1

1 Division of Imaging Sciences & Biomedical Engineering, King's College London, London, London, United Kingdom, 2 Centre for Medical Imaging, University College London, London, London, United Kingdom

Respiratory motion is a major challenge in 3D abdominal MRI, creating ghosting and blurring. Bin-to-bin motion correction techniques have been proposed to overcome these problems and reduce the scan time. However, intra-bin motion is unaccounted for resulting in, potentially significant, residual motion artifacts. Here we propose an intra-bin motion correction approach based on the assumption of a linear relation between the non-rigid motion of each acquired data within the bin and the inter-bin non-rigid motion model. The proposed method is compared with the conventional gated reconstruction, showing significantly improved sharpness and image quality.

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