MRI compatible implanted electronic medical device
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United States of America Patent
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Aug 28, 2012
Grant Date -
May 10, 2007
app pub date -
Oct 26, 2006
filing date -
Nov 4, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An implantable electronic medical device is compatible with a magnetic resonance imaging (MRI) scanner. The device has a housing with exterior walls, each formed by a dielectric substrate with electrically conductive layers on interior and exterior surfaces. A series of slots divide each layer into segments. Segmenting the layers provides high impedance to eddy currents produced by fields of the MRI scanner, while capacitive coupling of the segments provides radio frequency shielding for components inside the housing. Electrical leads extending from the housing have a pair of coaxially arranged conductors and traps that attenuate currents induced in the conductors by the fields of the MRI scanner.
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