Patent ID: 11927651
Assignee: JULIUS-MAXIMILIANS-UNIVERSITAET WUERZBURG
Field: Measurement (Instruments)
Classification: CPC G  A | IPC A  G

Claim 0:
1. A system for measuring a presence of magnetic particles in a probe volume, said system comprising:
a coil assembly arranged around a central coil assembly axis for generating a rotating magnetic field distribution, said coil assembly comprising at least 3 circumferentially distributed coil assembly sectors, wherein said coil assembly sectors are arranged circumferentially with respect to said central coil assembly axis;
a current controller configured to generate a time varying current in each of said coil assembly sectors, said time varying current comprising a periodic modulation with a rotation frequency, wherein said periodic modulation is phase shifted between adjacent coil assembly sectors to generate a magnetic field rotating in a plane perpendicular to said central coil assembly axis, said magnetic field rotating with a rotation frequency associated with a frequency of said periodic modulation,
wherein said system is configured to measure said presence of magnetic particles in said probe volume with said coil assembly, wherein said coil assembly is configured such that the generated rotating magnetic field is spaced from the coil assembly along the central coil assembly axis in order for said probe volume to be spaced from said coil assembly along said central coil assembly axis.