A Novel Approach to FFL Trajectory Analysis

The sampling trajectory is an important parameter of a magnetic particle imaging (MPI) system and should be selected in order to guarantee the best image quality constrained by hardware limitations. A simulation study is performed with the side conditions of a permanent magnet-based field-free line (FFL) scanner system evaluating multiple trajectory types (radial, spiral, uniform spiral, flower) and trajectory densities in terms of spatial resolution. The findings provide information on suitable FFL trajectories and indicate initial trends for advantageous sampling patterns in the reference system. While the study presented here uses simulated data, the used software framework has the potential to generate sequenced signals based on real measurement data. Within this framework, we present a novel approach to FFL trajectory analysis.