System for spatially adjustable excitation of leadless miniature marker
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United States of America Patent
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Apr 13, 2010
Grant Date -
Jan 3, 2008
app pub date -
Jan 26, 2007
filing date -
Dec 20, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A system for generating a magnetic field for excitation of a leadless marker assembly. The system of at least one embodiment includes a source generator that generates a plurality of alternating electrical signals each having an independently adjustable phase. A plurality of excitation coils are 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 is independently adjustable relative to the phase of the alternating electrical signal for the other excitation coils so as to adjust the magnetic field from the respective coil. The magnetic fields from the excitation coils combine to form a spatially adjustable excitation field for excitation of the remote leadless marker assembly.
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