apparatus and method of influencing and / or detecting magnetic particles in a field of vision The present invention relates to an apparatus and method of influencing and / or detecting magnetic particles in a field of view (28), particularly for patient examination. humans. The apparatus comprises: i. selection and focus means (120) for generating a magnetic focus and selection field (50), wherein said at least one selection and focus field coil assembly comprises: - at least one selection and focus field coil inner (113, 115) which is formed as a closed loop around an inner coil axis (115a), first select field coil and internal focus (115)； - a group of at least two outer selection and focus field coils (116-119) arranged at a greater distance from said inner coil axis (115a) than said at least one inner focus and selection field coil (113, 115) at different angular positions, each formed as a closed loop around an associated external coil axis (116a-119a)； and ii. guiding means (120) comprising a guiding field signal generating unit (122) and guiding field coils (124； 125, 126, 127) for changing the position in space and / or the size of the two subzones ( 52, 54) in the field of view (28) by means of a magnetic directing field, such that the magnetization of the magnetic material changes locally. 1/1resumo aparelho de influência e/ou detecção de partículas magnéticas em um campo de visão a presente invenção refere-se a um aparelho e método de influência e/ou detecção de partículas magnéticas em um campo de visão (28), particularmente para exame de pacientes humanos. o aparelho compreende: i. meios de seleção e foco (120) para gerar um campo de seleção e foco magnético (50), em que o mencionado pelo menos um conjunto de bobinas de campo de seleção e foco compreende: - pelo menos uma bobina de campo de seleção e foco interna (113, 115) que é formada como circuito fechado em volta de um eixo de bobina interno (115a), primeira bobina de campo de seleção e foco inter
