1Pattern Recognition Lab, FAU Erlangen-Nuremberg, Erlangen, Germany; 2Department of Nuclear Medicine, Technische Universitt Mnchen, Munich, Germany; 3Siemens Healthcare, Erlangen, Germany; 4Department of Radiology, NYU Langone Medical Center, New York City, NY, United States
First in-vivo results of respiratory motion compensation in hybrid PET-MRI systems are presented. With the help of self-gated reconstructions of a 3D radial stack-of-stars GRE sequence, a motion model can be generated from the MR images. The derived self-gating signal also allows motion-binned PET reconstruction. The motion model is applied to warp the -map to different respiratory levels as well as to perform motion correction in the reconstructed PET images.