Measurement of System Functions With Extended Field-of-View

The common way to obtain an image in magnetic particle imaging (MPI) is by inversion of a system function that describes the transformation between spatial distribution of the contrast agent and the measured signal. Recently, a concept of continuous motion of the field-of-view (FoV) has been introduced. In the latter, the MPI images were acquired during fast linear FoV motions. In this paper, we investigate the feasibility of more complex trajectories of the FoV in combination with adequate reconstruction. We compare the former proposed correction method with a large system function that contains the complex focus field movement. As a result, the approach to measure the complete system function yields in equal image quality for low FoV speed and slightly better image quality at the high-speed limit.