Patent ID: 9031633
Filing Date: 2015-05-12
Classification: A61B

Abstract:
1. An arrangement for detecting magnetic material in a region of action, the arrangement comprising: a selector configured to generate a magnetic selection field having a pattern in space of a strength of the magnetic selection field 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 drive configured to change the position in space of the first and second sub-zones in the region of action using a magnetic drive field so that magnetization of the magnetic material changes locally; a receiver configured to acquire detection signals, which detection signals depend on the magnetization in the region of action, which magnetization is influenced by the change in the position in space of the first and second sub-zone; a storage configured to store at least a subset of a measured data set of a system function, said measured data set describing a relation between spatial position of the magnetic material and a system response for said arrangement and a trajectory along which said first sub-zone is moved for acquisition of said measured data set; a processor configured to an image processor configured to reconstruct a spatial distribution of the magnetic material in the region of action from the detection signals and said processed system function data set.