Abstract #0781

Motion correction on a human PET/MR scanner: Clinical feasibility of a motion correction system in patients – an update report

Thomas Küstner^1,2, Christian Würslin³, Martin Schwartz^2,4, Hadi Fayad⁵, Thibaut Merlin⁵, Christopher Gilliam⁶, Thierry Blu⁶, Petros Martirosian⁴, Fritz Schick⁴, Bin Yang², Holger Schmidt¹, and Nina F Schwenzer¹

¹Department of Radiology, University of Tuebingen, Tuebingen, Germany, ²Institute of Signal Processing and System Theory, University of Stuttgart, Stuttgart, Germany, ³University of Stanford, Palo Alto, CA, United States, ⁴Section on Experimental Radiology, University of Tuebingen, Tuebingen, Germany, ⁵LaTIM, INSERM, University of Bretagne, Brest, France, ⁶Department of Electronic Engineering, Chinese University of Hong Kong, Hong Kong, Hong Kong

The diagnostic accuracy of Positron-Emission-Tomography/Magnetic Resonance (PET/MR) is often reduced in regions affected by respiratory and cardiac motion. These motion-induced artifacts can be corrected by an MR-derived motion model (MM). Here, we improved the previously presented PET/MR motion correction system by two new sampling trajectories for the MR motion imaging and extend it by the usage of an additional Compressed Sensing reconstruction (BART), an optical-flow based registration (LAP) and the incorporation of motion correction into a listmode-based PET reconstruction (CASToR) which are all integrated into the Gadgetron-based reconstruction pipeline for a clinical feasible setup. In-vivo patient data substantiated the improvements.

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