Holding Magnets and Magnet System for Implantable Systems Optimized for MRI
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United States of America
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Issued Date -
Feb 13, 2025
app pub date -
Aug 5, 2024
filing date -
Aug 5, 2024
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Abstract
An implant device is disclosed that includes signal processing circuitry configured to receive an implant communications signal transmitted from an external transmitting coil, a magnet case configured to be rotatable about a case rotation axis, and an implant magnet arrangement within the magnet case configured to cooperate with an external holding magnet in an external device to magnetically hold the external device against overlying skin. The implant magnet arrangement includes a plurality of cylindrical magnets, each with a center cylinder axis perpendicular to the case rotation axis, and each configured to be rotatable about a center cylinder axis. The north and south magnetic poles are arranged with respect to each other so as not to lie on a common diameter through the center cylinder axis such that the north and south magnetic directions form a magnetic angle less than 180 degrees with a vertex at the center cylinder axis.
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