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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