Measure of trajectory quality in Magnetic Particle Imaging

For all trajectories, the energies computed in time and frequency domain agree well. The maximum local magnetization change dM/dt is largest for the spiral and Lissajous trajectories while it is smallest for the Cartesian trajectory. For the Lissajous and Cartesian trajectories, the total magnetization change appears more homogeneous over the field of view (FOV) than for the radial and spiral trajectories, where it is stronger in the center compared to the borders. In general, areas of homogeneous high total magnetization change seem to correspond to areas of high spatial resolution in reconstructed images.