System for spatially adjustable excitation of leadless miniature marker

A system for generating a spatially adjustable excitation field for excitation of a leadless marker assembly, the system being connectable to a source generator that generates a plurality of alternating electrical signals having independently adjustable phases, the system comprising:

• a leadless marker assembly;
• and
• a plurality of excitation coils remote from the leadless marker assembly, each excitation coil being independently coupled to the source generator;
• the excitation coils being configured to simultaneously receive a respective one of the alternating electrical signals at a selected phase to generate a magnetic field,
• the phase of the alternating electrical signal for each excitation coil being independently adjustable relative to the phase of the alternating electrical signal for the other ones of the excitation coils to adjust the magnetic field from the respective coil;
• the magnetic fields from the excitation coils being combined to form a spatially adjustable excitation field for excitation of the remote leadless marker assembly.

A system for generating an excitation field for excitation of a leadless marker assembly, the system being connectable to a source generator that generates a plurality of alternating electrical signals having an independently adjustable phase, the system comprising:

• a plurality of excitation coils configured to generate a magnetic field for excitation of the leadless marker assembly;
• and
• a switching network couplable to the source generator, the switch network having a plurality of switches independently coupled to the excitation coils, the plurality of switches being configured to selectively direct electrical signals through respective ones of the excitation coils to independently generate an alternating magnetic field with a selected phase for each excitation coil;
• and
• the magnetic fields from the excitation coils being combined to form a spatially adjustable excitation field for excitation of the remote leadless marker assembly.

A marker system, comprising:

• a plurality of leadless resonating marker assemblies being excitable by a magnetic excitation signal and being configured to generate marker resonant signals at one or more selected resonant frequencies;
• a plurality of location sensors remote from the marker assemblies and configured to receive the marker signals;
• and
• a source generator assembly having an energy storage device, first and second switching networks connected to an energy storage device, and first and second excitation coils, and the first switching network and first excitation coil being interconnected and being independent of the second excitation coil, and the second switching network and the second excitation coil being interconnected and independent of the first excitation coil.

A system for generating a spatially adjustable excitation field for excitation of a remote leadless marker assembly, comprising:

• a means for generating a plurality of alternating electrical signals having independently adjustable phases;
• and
• a plurality of means for generating a magnetic field each coupled to the source generator,
• the means for generating a magnetic field being configured to receive a respective one of the alternating electrical signals at a selected phase to generate a magnetic field,
• the phase of the alternating electrical signal for each means for generating a magnetic field being independently adjustable relative to the phase of the alternating electrical signal for the other ones of the means for generating a magnetic field;
• the magnetic fields from the plurality of means for generating a magnetic field being combined to form a spatially adjustable excitation field for excitation of the remote leadless marker assembly.

A system for generating a spatially adjustable excitation field for excitation of a leadless marker assembly, the system being connectable to a source generator that generates a plurality, alternating electrical signals having an independently adjustable phase, the system comprising:

• a leadless marker assembly;
• and
• a plurality of means for generating a magnetic field remote from the leadless marker assembly, each means for generating a magnetic field being couplable to the source generator,
• the means for generating a magnetic field being configured to simultaneously receive a respective one of the alternating electrical signals at a selected phase to generate a magnetic field, the phase of the alternating electrical signal for each means for generating a magnetic field being independently adjustable relative to the phase of the alternating electrical signal for the other ones of the means;
• the magnetic fields from the means for generating a magnetic field being combined to form a spatially adjustable excitation field for excitation of the remote leadless marker assembly.