Foerger, F.F.FoergerBoberg, M.M.BobergMöddel, M.M.MöddelScheel, J.-P.J.-P.ScheelGräser, MatthiasMatthiasGräserKnopp, T.T.Knopp2023-02-142023-02-142022https://publica.fraunhofer.de/handle/publica/43596410.18416/ijmpi.2022.22030652-s2.0-85128311114A major issue for human-sizedMagnetic Particle Imaging scanners is the generation of sufficiently large magnetic gradient fields. By taking advantage of the field amplification properties of soft-iron, a considerable amount of power can be saved. In this work, an optimized selection and focus field generator is presented, that can generate flexible and high gradient fields at comparatively lowpower consumption. Coil spacing and possible field-free-point positions are similar to conventional MPI scanners designed with air coils, but with significantly less demands on infrastructure and cooling design. The optimization process is discussed and first field measurements are presented.enjournal article