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Abstract #2578

In-vivo MR-derived non-rigid motion correction of simultaneously acquired PET

Thomas Kstner 1,2 , Christian Wrslin 1 , Sergios Gatidis 1 , Petros Martirosian 3 , Nina Schwenzer 1 , Bin Yang 2 , and Holger Schmidt 1

1 Department of Radiology, University Hospital of Tbingen, Tbingen, Baden-Wrttemberg, Germany, 2 Institute of Signal Processing and System Theory, University of Stuttgart, Stuttgart, Baden-Wrttemberg, Germany, 3 Diagnostic and Interventional Radiology, University Hospital of Tbingen, Tbingen, Baden-Wrttemberg, Germany

In the field of oncology, simultaneous PET/MR scanners offer a great potential for improving diagnostic accuracy. However for accurate lesion detection and quantification, the induced motion artifacts in the PET image originating from a long free-breathing acquisition have to be compensated. The simultaneous acquisition allows performing a MR-based non-rigid motion correction of the PET data. Therefore it is essential to acquire a 4D MR image as accurate and fast as possible under free-breathing conditions. We propose a clinical feasible motion correction setup which uses a Compressed Sensing acquisition. In-vivo patient data substantiates the diagnostic improvement of the motion corrected PET.

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