The present invention relates to an apparatus (100) for influencing and/or detecting magnetic particles in a field of view (28), wherein the field of view (28) comprises at least one sub field of interest covering at least a portion of an object of interest containing magnetic particles. The apparatus (100) applying the known principle of Magnetic Particle Imaging (MPI) comprises selection means for generating a magnetic selection field (50) having the known field pattern showing a field free point (FFP), drive means for changing the position in space of the FFP by means of a magnetic drive field, receiving means for acquiring detection signals depending on the magnetization of the magnetic particles within the field of view (28), a control unit (150) for controlling a signal receiving unit (140) comprised in the receiving means for acquiring a set of high resolution detection signals and a set of low resolution detection signals, wherein the set of high resolution detection signals depends on the magnetization of at least one subfield of interest and the set of low resolution detection signals depends on the magnetization of at least one adjacent subfield being arranged adjacent to the at least one subfield of interest, and a reconstruction unit (152) for reconstructing a particle distribution quantity depending on the set of high resolution detection signals and the set of low resolution detection signals. The present invention further relates to a corresponding method as well as to a computer program.
