A magnetic transmitting array for generating a magnetic field for tracking of an object, comprising the following: a plurality of first layer magnetic transmitting elements (92-1, 92-2, 92-3, 92-4) disposed within a fluoro window; a plurality of second layer magnetic transmitting elements (94-1, 94-2, 94-3, 94-4); and a plurality of third layer magnetic transmitting elements (96-1, 96-2, 96-3, 96-4), wherein an insulation layer is provided between the plurality of second layer and third layer magnetic transmitting elements and the plurality of second layer magnetic transmitting elements (94-1, 94-2, 94-3, 94-4) are disposed on a first surface of the insulation layer and the plurality of third layer magnetic transmitting elements (96-1, 96-2, 96-3, 96-4) are disposed on a second surface of the insulation layer, opposite to the first surface, wherein each of the magnetic transmitting elements are made of a fluorolucent material allowing X-rays to pass through, such that unobstructed fluoroscopic images can be provided, and comprises: a first spiral trace that extends from a first outer origin inward to a central origin in a first direction; and a second spiral trace that extends from the central origin outward to a second outer origin in the first direction, wherein: the first spiral trace and the second spiral trace are physically connected at the central origin to form a fluorolucent magnetic transmitting element; at least a portion of the first spiral trace overlaps at least a portion of the second spiral trace. a plurality of first layer magnetic transmitting elements (92-1, 92-2, 92-3, 92-4) disposed within a fluoro window; a plurality of second layer magnetic transmitting elements (94-1, 94-2, 94-3, 94-4); and a plurality of third layer magnetic transmitting elements (96-1, 96-2, 96-3, 96-4), wherein an insulation layer is provided between the plurality of second layer and third layer magnetic transmitting elements and the plurality of second layer magnetic transmitting elements (94-1, 94-2, 94-3, 94-4) are disposed on a first surface of the insulation layer and the plurality of third layer magnetic transmitting elements (96-1, 96-2, 96-3, 96-4) are disposed on a second surface of the insulation layer, opposite to the first surface, wherein each of the magnetic transmitting elements are made of a fluorolucent material allowing X-rays to pass through, such that unobstructed fluoroscopic images can be provided, and comprises: a first spiral trace that extends from a first outer origin inward to a central origin in a first direction; and a second spiral trace that extends from the central origin outward to a second outer origin in the first direction, wherein: the first spiral trace and the second spiral trace are physically connected at the central origin to form a fluorolucent magnetic transmitting element; at least a portion of the first spiral trace overlaps at least a portion of the second spiral trace. a first spiral trace that extends from a first outer origin inward to a central origin in a first direction; and a second spiral trace that extends from the central origin outward to a second outer origin in the first direction, wherein: the first spiral trace and the second spiral trace are physically connected at the central origin to form a fluorolucent magnetic transmitting element; at least a portion of the first spiral trace overlaps at least a portion of the second spiral trace. the first spiral trace and the second spiral trace are physically connected at the central origin to form a fluorolucent magnetic transmitting element; at least a portion of the first spiral trace overlaps at least a portion of the second spiral trace.