Abstract #1279

Gating PET data for cardiac imaging with radial MRI data

Daniel Spitzer¹, Klaus Schaefers², Lynn Frohwein², Bjoern Czekalla², Florian Buether^2,3, 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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