Arrangement and method for influencing and/or detecting magnetic particles in a region of action

摘要

An arrangement and a method for influencing and/or detecting magnetic particles in a region of action includes a generator for generating a magnetic selection field having a pattern in space of its magnetic field strength such that a first sub-zone having a low magnetic field strength and a second sub-zone having a higher magnetic field strength are formed in the region of action. A driver is configured to change the position in space of the two sub-zones in the region of action by means of a magnetic drive field so that the magnetization of the magnetic particles changes locally. The generator includes at least one permanent magnet which is at least partially shielded by an electrically high conductive shielding.