Patent ID: 7197354

Claim:
Electromagnetic field detector located within a catheter, for determining the position and orientation of the catheter according to an electromagnetic field generated in the vicinity of the catheter, the catheter including a distal tip and the distal tip including a proximal side and a distal side, the electromagnetic field detector comprising: a ferromagnetic core having a perforation, said perforation providing communication between a first side of said ferromagnetic core and a second side of said ferromagnetic core, said first side facing said proximal side and said second side facing said distal side; and at least one winding wound around said ferromagnetic core, said at least one winding being coupled with a position and orientation determining system, said at least one winding producing a current according to said electromagnetic field, said position and orientation determining system determining said position and orientation according to said current, wherein said ferromagnetic core increases the sensitivity of said electromagnetic field detector to said electromagnetic field, by increasing a proportionality factor between said current and said electromagnetic field.