Abstract #4326

Improved attenuation correction for cardiac 18F-FDG PET/MR hybrid imaging

Maike E. Lindemann¹, Felix Nensa², and Harald H. Quick^1,3

¹High-Field and Hybrid MR Imaging, University Hospital Essen, Essen, Germany, ²Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany, ³Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg Essen, Essen, Germany

The aim of this study was to evaluate and quantify the effect of improved attenuation correction including bone segmentation and truncation correction on 18F-FDG cardiac PET/MR imaging. Therefore, 32 cardiac patient data sets were reconstructed with different AC-maps and polar plots were generated and analyzed. The MR-based HUGE method for truncation correction combined with CT model-based bone segmentation resulted in a homogeneous 6% gain of PET signal across the myocardium compared to standard Dixon-VIBE imaging. The majority of observed AC-map artifacts did not significantly affect the quantitative assessment of the myocardium.

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