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Abstract #1404

Integrated PET/MR: Phantom Studies Towards Radiotracer Dose Reduction

Mark Oehmigen 1 , Susanne Ziegler 1 , Bjrn W. Jakoby 2,3 , and Harald H. Quick 1

1 Institute of Medical Physics, University of Erlangen-Nuremberg, Erlangen, Germany, 2 Siemens Healthcare Sector, Erlangen, Germany, 3 University of Surrey, Guildford, Surrey, United Kingdom

In integrated PET/MR hybrid imaging data acquisition times per bed position are comparatively longer than in PET/CT imaging. Increasing PET data acquisition times may allow decreasing the injected radiotracer dose while maintaining image quality. All measurements were performed on an integrated PET/MR whole-body hybrid system using the NEMA image quality phantom. PET images were acquired with doubled time but halved activity. The images acquired at different tracer activity levels and acquisition times show no visible difference in quality and only small quantitative measurable changes. Longer PET acquisition time in PET/MR enable the reduction of the administered PET tracer activity.

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