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.本発明は、撮像領域２８内の磁性粒子に影響及び／又は磁性粒子を検出するための装置１００に関し、撮像領域２８は磁性粒子を含む関心の対象物の少なくとも一部をカバーする少なくとも一つの関心の撮像副領域を有する。磁性粒子撮像（ＭＰＩ）の既知の原理を適用する装置１００は、フィールドフリーポイント（ＦＦＰ）を示す既知のフィールドパターンを持つ選択磁場を生成するための選択手段５０と、撮像領域２８内の磁性粒子の磁化に依存して検出信号を得るための受信手段と、一組の高解像度検出信号及び一組の低解像度検出信号を得るため受信手段に含まれる信号受信ユニット１４０を制御するための制御ユニット１５０と、一組の高解像度検出信号及び一組の低解像度検出信号に依存する粒子分布量を再構成するための再構成ユニット１５２とを有し、一組の高解像度検出信号は関心の少なくとも一つの撮像副領域の磁化に依存し、一組の低解像度検出信号は少なくとも一つの関心の撮像副領域に隣接して配置される少なくとも一つの隣接撮像副領域の磁化に依存する。本発明は、更に、対応する方法だけでなくコンピュータプ
