Interventional MRI system and RF coils therefore
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United States of America Patent
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Oct 25, 1994
Grant Date -
N/A
app pub date -
Mar 18, 1993
filing date -
Mar 18, 1993
priority date (Note) -
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Abstract
An MRI RF coil utilizes a helical conductor having a plurality of turns and a non-uniform pitch between turns along at least a portion of the axial length of the coil. The non-uniform pitch is disposed so as to accommodate interventional procedures and/or interventional apparatus (e.g., stereotaxic frames) when used on a human patient in conjunction with magnetic resonance imaging. The non-uniform pitch portion of the coil may comprise a simple gap, an opening formed by deformation or angular disposition of some or all of the coil turns and/or by utilizing fringe field effects of the coil to accomplish at least some of the magnetic resonance imaging procedure.
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