Figure 9. .

Future of MPI scanner. (A) An integrated MPI-MRI system designed by Bruker BioSpin GmbH and University of RWTH, Achen. Image shows a cavity phantom with MRI image in greyscale and MPI image rendered in red scale. (Adapted with permission from¹⁰⁵) (B) A human scale head MPI scanner design demonstrating the FFL region using a x-z gradient of 1 T m^–1 (Reproduced under the creative common license from¹⁰⁶). (C) Magnetostimulation limit and SAR estimate in human torso (graph reproduced with permission from¹⁰⁷), PNS is the dominant safety concern for MPI at drive field frequency <42 kHz. FFL, field-free line; MPI, magnetic particle imaging; PNS, peripheral nerve stimulation.