WO2007024616A3 - Resonator with adjustable capacitor for medical device - Google Patents

Resonator with adjustable capacitor for medical device Download PDF

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Publication number
WO2007024616A3
WO2007024616A3 PCT/US2006/032108 US2006032108W WO2007024616A3 WO 2007024616 A3 WO2007024616 A3 WO 2007024616A3 US 2006032108 W US2006032108 W US 2006032108W WO 2007024616 A3 WO2007024616 A3 WO 2007024616A3
Authority
WO
WIPO (PCT)
Prior art keywords
resonator device
resonator
changes
adjustable capacitor
medical device
Prior art date
Application number
PCT/US2006/032108
Other languages
French (fr)
Other versions
WO2007024616A2 (en
Inventor
Jan Weber
Original Assignee
Boston Scient Scimed Inc
Jan Weber
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 Boston Scient Scimed Inc, Jan Weber filed Critical Boston Scient Scimed Inc
Priority to EP06801713.6A priority Critical patent/EP1917537B1/en
Publication of WO2007024616A2 publication Critical patent/WO2007024616A2/en
Publication of WO2007024616A3 publication Critical patent/WO2007024616A3/en

Links

Classifications

    • 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
    • G01R33/285—Invasive instruments, e.g. catheters or biopsy needles, specially adapted for tracking, guiding or visualization by NMR
    • G01R33/286—Invasive instruments, e.g. catheters or biopsy needles, specially adapted for tracking, guiding or visualization by NMR involving passive visualization of interventional instruments, i.e. making the instrument visible as part of the normal MR process
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
    • 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
    • G01R33/3628—Tuning/matching of the transmit/receive coil
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing

Abstract

A resonator device (100) with an adjustable capacitor for allowing the resonance frequency (F) of the resonator device to continue to be matched to the Larmor frequency of the MRI system. The resonator device includes an inductor coil (102), a conductive member (104), a sleeve (110) having first and second sockets (112, 114) that receive at least portions of the inductor coil and the conductive member as electrodes to provide a capacitor structure. Dielectric material can be positioned between at least the first and second sockets, where changes in the cross sectional area defined by the induction coil cause changes in the capacitance value (C) as one or more of the electrodes move within the socket. Changes in the inductance and the capacitance values allow for the resonance frequency (F) of the resonator device to continue to be matched to the Larmor frequency of the MRI system.
PCT/US2006/032108 2005-08-23 2006-08-17 Resonator with adjustable capacitor for medical device WO2007024616A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06801713.6A EP1917537B1 (en) 2005-08-23 2006-08-17 Resonator with adjustable capacitor for medical device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/209,219 2005-08-23
US11/209,219 US7304277B2 (en) 2005-08-23 2005-08-23 Resonator with adjustable capacitor for medical device

Publications (2)

Publication Number Publication Date
WO2007024616A2 WO2007024616A2 (en) 2007-03-01
WO2007024616A3 true WO2007024616A3 (en) 2007-04-19

Family

ID=37715968

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/032108 WO2007024616A2 (en) 2005-08-23 2006-08-17 Resonator with adjustable capacitor for medical device

Country Status (3)

Country Link
US (2) US7304277B2 (en)
EP (1) EP1917537B1 (en)
WO (1) WO2007024616A2 (en)

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US7304277B2 (en) 2007-12-04
EP1917537B1 (en) 2013-12-18

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