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Abstract #1279

Gating PET data for cardiac imaging with radial MRI data

Daniel Spitzer1, Klaus Schaefers2, Lynn Frohwein2, Bjoern Czekalla2, Florian Buether2,3, and Cornelius Faber1

1Department of Clinical Radiology, University of Muenster, Muenster, Germany, 2European Institute for Molecular Imaging, University of Muenster, Muenster, Germany, 3Department of Nuclear Medicine, University Hospital Muenster, Muenster, Germany

The increasing availability of MR/PET scanners opens new perspectives for cardiac imaging. However, technical issues for the reconstruction of signal from the moving myocardium remain to be solved. Using the k-space center in radial cardiac MRI data allows for generating a robust gating signal. Here, MR data acquired with a radial FLASH sequence in a 3 T MR/PET scanner continuously during a 15 minutes PET acquisition were used for retrospective gating. The k-space center magnitude was used to sort MRI and PET data into different cardiac phases while respiration-corrupted data were excluded, resulting in well separated cardiac phases.

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