Design and Optimization for a Novel Field Free Line Generation Magnet for Human Target Clinical MPI—A Preliminary Study

In order to optimize the preformation of the field free line (FFL) for human-targeted clinical magnetic particle imaging, an advanced design for the generation of FFL with two pairs of concentric circular coils is proposed in this paper. Simulation study using FEM software was performed to study the relationship between the coil geometric parameters and the FFL quality. Particle-swarm optimization algorithm was performed to optimize the coil topology to gain a highly homogenous gradient field. The results demonstrated that high quality FFL can be generated by the concentric circular coil pairs and the topology of the concentric circle coils is also promising for the human target clinical usage, with the rotation of the FFL just perpendicular to the movement direction of patients inside.