1. An apparatus (100) for acting on the magnetic particles and / or detection in the region (28) viewing, comprising: - selecting means, comprising a unit (110) generating a field selection signal, and the elements (116) selection field for generating a magnetic field (50) selection having such a structure in the space of its magnetic field strength at which a region (28) viewing first subzone formed (52) from the low magnetic field strength and the second subzone (54) of higher magnetic field strength, - driving means comprising blocks (130) generating excitation field and signal circuits (136a, 136b, 136c) of the excitation field for changing the position in space of the two sub-zones (52, 54) in the region (28) by viewing the magnetic excitation field so that the magnetization of the magnetic material changes locally u means (150) for controlling said unit (130) generating a field excitation signal to generate the excitation current to cause the excitation field contours generate excitation magnetic field in such a way that the first subzone (52) is moved along the number p of low density predetermined trajectories each of which has the shape of a closed curve located differently within the field of view, each excitation current has the frequency of the excitation current and excitation current phase, wherein said means (150) from systematic way is adapted to control said control unit (130) generating a field excitation signal to generate the excitation currents in such a way that the excitation current frequency values are equal or the ratio of frequencies in the range from 0.5 to 0.98 and that the excitation phase currents of at least about1. Устройство (100) для воздействия на магнитные частицы и/или их выявления в области (28) обзора, которое содержит:- средство выбора, содержащее блок (110) генерации сигнала поля выбора и элементы (116) поля выбора для создания магнитного поля (50) выбора, имеющего такую структуру в пространстве его напряженности магнитног
