Patent ID: 11918298
Assignee: BIOSENSE WEBSTER (ISRAEL) LTD.
Field: Medical technology (Instruments)
Classification: CPC A  G  H | IPC A  G

Claim 10:
11. A position tracking system, comprising:
a probe configured to be inserted into a body part of a living subject, and comprising:
a shaft having a distal end;
a tube comprising a thermoplastic material, the tube being fixed to the distal end of the shaft and having an inner diameter and an outer diameter that have been reduced through a heat shrink process such that the inner diameter is less than 150 microns;
unbound powder granules of ferrite contained within the inner diameter of the tube;
a coil disposed around the outer diameter of the tube; and
electrical wires connected to the coil so as to read out a signal generated across the coil due to an applied magnetic field, wherein the electrical wires comprise twisted pair conductors;

a location pad having at least one magnetic field radiator configured to transmit alternating magnetic fields into a region where the body part is located; and
processing circuitry coupled to the electrical wires, and configured to: receive the signal from the coil; and compute a position and orientation of the distal end responsively to the received signal.