Abstract #3683

Optimization of MR-Based Attenuation Correction for Cardiac PET/MR Using Free-Breathing Multi-Echo Golden-Angle Radial Stack-of-Stars MR

Philip Robson¹, Thomas Benkert², MariaGiovanna Trivieri³, Nicolas Karakatsanis¹, Ronan Abgral⁴, Marc Dweck⁵, Jason Kovacic³, Tobias Block², and Zahi Fayad¹

¹Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States, ²Center for Advanced Imaging Innovation and Research, New York University School of Medicine, New York, NY, United States, ³Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States, ⁴Department of Nuclear Medicine, European University of Brittany, Brest, France, ⁵British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, United Kingdom

Recently hybrid PET/MR has gained much interest for its potential to combine PET imaging of disease activity with the benefits of cardiac MR. MR-based attenuation correction (MRAC) is an important aspect of accurate PET tracer quantification. For imaging the heart, optimal MRAC is required to both compensate for cardiac motion and also to optimize segmentation of tissues for accurate PET reconstruction. In this work we investigate the use of multi-echo golden-angle radial stack-of-stars MR to combine these 2 key attributes.

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