Patent ID: 9498149
Filing Date: 2016-11-22
CPC Classification: A61B,G06T

Claim Text:
1. An apparatus for detecting magnetic particles in a field of view, which apparatus comprises: a selection field signal generator device coupled to selection field coils that are configured to generate 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 the 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 device coupled to drive field coils that are configured to change the position in space of the first and second sub-zones in the field of view by means of a magnetic drive field so that the magnetization of the magnetic material changes locally, at least one signal receiving device coupled to at least one receiving coil configured to acquire detection signals, which detection signals depend on the magnetization in the field of view, which magnetization is influenced by the change in the position in space of the first and second sub-zones, and a processor coupled to said at least one signal receiving device, said processor being configured to reconstruct an image of the field of view from the acquired detection signals, wherein said processor is further configured to