Mri and rf compatible leads and related methods of operating...

Details Mri and rf compatible leads and related methods of operating... Mri and rf compatible leads and related methods of operating...

A - Human Necessities

61

N

A61N 1/16 (2006.01) A61N 1/05 (2006.01) A61N 1/37 (2006.01)

Patent

CA 2681367

RF/MRI compatible leads include at least one conductor that turns back on itself at least twice in a lengthwise direction, and can turn back on itself at least twice at multiple locations along its length. The at least one electrical lead can be configured so that the lead heats local tissue less than about 10 degrees Celsius (typically about 5 degrees Celsius or less) or does not heat local tissue when a patient is exposed to target RF frequencies at a peak input SAR of at least about 4 W/kg and/or a whole body average SAR of at least about 2 W/kg. Related devices and methods of fabricating leads are also described.

L'invention concerne des fils compatibles RF/MRI comprenant au moins un conducteur qui revient sur lui-même au moins deux fois dans la direction longitudinale, et peut revenir sur lui-même au moins deux fois au niveau de multiples emplacements le long de sa longueur. Le au moins un fil conducteur électrique peut être configuré de sorte que le fil chauffe un tissu local à moins 10° Celsius (de manière typique environ 5° Celsius ou moins) ou ne chauffe pas un tissu local lorsqu'un patient est exposé à des fréquences RF cibles à un SAR d'entrée de pic d'au moins environ 4 W/kg et/ou un SAR moyen de corps complet d'au moins environ 2 W/kg. Des dispositifs concernés et des procédés de fabrication de fils concernés sont également décrits.

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