Patent ID: 9370315
Filing Date: 2016-06-21
CPC Classification: A61B,G01R

Claim Text:
1. An apparatus for influencing and/or detecting magnetic particles in a field of view, wherein the apparatus comprises: a selection field signal generator unit and selection field elements 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 where a magnetization of the magnetic particles is not saturated and a second sub-zone having a higher magnetic field strength where the magnetization of the magnetic particles is saturated are formed in the field of view, a drive field signal generator unit, a signal receiving unit and a drive-receiving coil, said drive-receiving coil being configured both for changing a position in space of the first and second sub-zones in the field of view by a magnetic drive field so that the magnetization of the magnetic particles changes locally and for acquiring detection signals, wherein the detection signals depend on the magnetization of the magnetic particles in the field of view, wherein the magnetization is influenced by the change in the position in space of the first and second sub-zones, a bridge unit coupled between said drive field signal generator unit and said signal receiving unit, said bridge unit comprising wherein the signal receiving unit is coupled to a first output terminal arranged between the first and second bridge sub-units and a second output terminal arranged between the third and fourth bridge sub-units.