Philip M Robson1, Marc R Dweck1, Nicolas A Karakatsanis1, Maria Giovanna Trivieri2, Ronan Abgral1, Johanna Contreras2, Umesh Gidwani2, Jagat P Narula2, Valentin Fuster2, Jason C Kovacic2, and Zahi A Fayad1
1Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States, 2Department of Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, United States
Cardiac and coronary
imaging using hybrid PET/MR is gaining increasing interest. PET image reconstruction requires knowledge
of the PET-photon attenuation of the object in order to produce accurate images
of PET tracer activity. The standard
approach for MR-based attenuation correction is breath-hold volumetric imaging
to freeze motion of the chest and abdomen.
However, for imaging the heart, alignment of anatomy during PET data
collection and attenuation measurement is crucial. In this work, we propose mapping attenuation
using a free-breathing golden-angle radial gradient echo sequence and compare
the PET images produced with this novel approach and the standard breath-hold
approach.
