WO2006044550A3 - Magnetic resonance imaging interference immune device - Google Patents

Magnetic resonance imaging interference immune device Download PDF

Info

Publication number
WO2006044550A3
WO2006044550A3 PCT/US2005/036839 US2005036839W WO2006044550A3 WO 2006044550 A3 WO2006044550 A3 WO 2006044550A3 US 2005036839 W US2005036839 W US 2005036839W WO 2006044550 A3 WO2006044550 A3 WO 2006044550A3
Authority
WO
WIPO (PCT)
Prior art keywords
gap region
gap
wire lead
magnetic resonance
resonance imaging
Prior art date
Application number
PCT/US2005/036839
Other languages
French (fr)
Other versions
WO2006044550A2 (en
Inventor
Robert W Gray
Jeffrey L Helfer
Original Assignee
Biophan Technologies Inc
Robert W Gray
Jeffrey L Helfer
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Biophan Technologies Inc, Robert W Gray, Jeffrey L Helfer filed Critical Biophan Technologies Inc
Priority to EP05804351A priority Critical patent/EP1804665A4/en
Publication of WO2006044550A2 publication Critical patent/WO2006044550A2/en
Publication of WO2006044550A3 publication Critical patent/WO2006044550A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362—Heart stimulators
    • A61N1/37—Monitoring; Protecting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/02—Details
    • A61N1/04—Electrodes
    • A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/02—Details
    • A61N1/08—Arrangements or circuits for monitoring, protecting, controlling or indicating
    • A61N1/086—Magnetic resonance imaging [MRI] compatible leads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362—Heart stimulators
    • A61N1/37—Monitoring; Protecting
    • A61N1/3718—Monitoring of or protection against external electromagnetic fields or currents
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
    • G01R33/3685—Means for reducing sheath currents, e.g. RF traps, baluns

Abstract

A medical assembly includes a multi-wire lead having a plurality of coiling loops. The multi-wire lead has a gap region and a non-gap region. The gap region has adjacent coiling loops of the multi-wire lead with gap therebetween so as to form different impedance in the gap region than impedance in the non-gap region. The non-gap region has adjacent coiling loops of the multi-wire lead with no gap therebetween. The gaps may provide inter-loop capacitance. The multi-wire lead may have a plurality of gap regions, each gap region having a non-gap region therebetween.
PCT/US2005/036839 2004-10-15 2005-10-13 Magnetic resonance imaging interference immune device WO2006044550A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05804351A EP1804665A4 (en) 2004-10-15 2005-10-13 Magnetic resonance imaging interference immune device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US61909804P 2004-10-15 2004-10-15
US60/619,098 2004-10-15
US11/248,862 US7388378B2 (en) 2003-06-24 2005-10-12 Magnetic resonance imaging interference immune device
US11/248,862 2005-10-12

Publications (2)

Publication Number Publication Date
WO2006044550A2 WO2006044550A2 (en) 2006-04-27
WO2006044550A3 true WO2006044550A3 (en) 2009-03-05

Family

ID=36203516

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/036839 WO2006044550A2 (en) 2004-10-15 2005-10-13 Magnetic resonance imaging interference immune device

Country Status (3)

Country Link
US (1) US7388378B2 (en)
EP (1) EP1804665A4 (en)
WO (1) WO2006044550A2 (en)

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Also Published As

Publication number Publication date
EP1804665A2 (en) 2007-07-11
EP1804665A4 (en) 2009-09-16
WO2006044550A2 (en) 2006-04-27
US20060030774A1 (en) 2006-02-09
US7388378B2 (en) 2008-06-17

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