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

Claim 13:
14. A method for measuring a presence of magnetic particles in a probe volume with a coil assembly arranged around a central coil assembly axis, wherein said probe volume is spaced from said coil assembly along said central coil assembly axis,
wherein said coil assembly comprises at least 3 circumferentially distributed coil assembly sectors, wherein said coil assembly sectors are arranged circumferentially with respect to said central coil assembly axis;
and wherein the method comprises:
generating a rotating magnetic field distribution by generating a time varying current in each of said coil assembly sectors, said time varying current comprising a periodic modulation, 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 and 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, said magnetic field rotating with a rotation frequency associated with a frequency of said periodic modulation.