An electromagnetic coil arrangement comprising a plurality of
electromagnetic sensors located about the periphery of a region and at
least one center electromagnetic sensor located at or near the center of
the region, wherein the plurality of electromagnetic sensors and the at
least one center electromagnetic sensor are located in a single plane. An
electromagnetic tracking system and method of use, the electromagnetic
tracking system comprising the electromagnetic coil arrangement, at least
one complementary electromagnetic sensor, and a processor configured to
process a signal comprising data indicative of a mutual inductance
between the at least one complementary electromagnetic sensor and each of
the electromagnetic sensors of the electromagnetic coil arrangement.