WO2008106513A3 - Induced current measurement systems and methods - Google Patents

Induced current measurement systems and methods Download PDF

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Publication number
WO2008106513A3
WO2008106513A3 PCT/US2008/055127 US2008055127W WO2008106513A3 WO 2008106513 A3 WO2008106513 A3 WO 2008106513A3 US 2008055127 W US2008055127 W US 2008055127W WO 2008106513 A3 WO2008106513 A3 WO 2008106513A3
Authority
WO
WIPO (PCT)
Prior art keywords
measurement system
magnetic resonance
resonance imaging
medical device
implantable medical
Prior art date
Application number
PCT/US2008/055127
Other languages
French (fr)
Other versions
WO2008106513A2 (en
Inventor
Steve R Wedan
Original Assignee
Cardiac Pacemakers Inc
Steve R Wedan
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 Cardiac Pacemakers Inc, Steve R Wedan filed Critical Cardiac Pacemakers Inc
Priority to JP2009551816A priority Critical patent/JP4932914B2/en
Priority to EP08730844A priority patent/EP2129432B1/en
Publication of WO2008106513A2 publication Critical patent/WO2008106513A2/en
Publication of WO2008106513A3 publication Critical patent/WO2008106513A3/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
    • 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
    • G01R33/285—Invasive instruments, e.g. catheters or biopsy needles, specially adapted for tracking, guiding or visualization by NMR
    • 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
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • 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
    • G01R33/288—Provisions within MR facilities for enhancing safety during MR, e.g. reduction of the specific absorption rate [SAR], detection of ferromagnetic objects in the scanner room

Abstract

In an embodiment, the invention includes a measurement system for measuring induced currents within an implantable medical device undergoing magnetic resonance imaging. The measurement system can include a resistor connected in series with a conductive loop and electronic circuitry configured to generate a signal representative of a voltage differential across the resistor. In some embodiments, the measurement system includes a fiber optic cable configured to transmit the signal away from the area subject to magnetic resonance imaging. In some embodiments, the measurement system includes a transmitter to wirelessly transmit the signal away from the area subject to magnetic resonance imaging. In an embodiment, the invention can include an implantable medical device including a measurement system for measuring induced currents. In an embodiment, the invention can include a method of measuring an induced current in an implantable medical device undergoing magnetic resonance imaging. Other embodiments are described herein.
PCT/US2008/055127 2007-02-28 2008-02-27 Induced current measurement systems and methods WO2008106513A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2009551816A JP4932914B2 (en) 2007-02-28 2008-02-27 Induction current measurement system and method
EP08730844A EP2129432B1 (en) 2007-02-28 2008-02-27 Induced current measurement systems and methods

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/680,267 2007-02-28
US11/680,267 US7873412B2 (en) 2007-02-28 2007-02-28 Induced current measurement systems and methods

Publications (2)

Publication Number Publication Date
WO2008106513A2 WO2008106513A2 (en) 2008-09-04
WO2008106513A3 true WO2008106513A3 (en) 2008-11-27

Family

ID=39716796

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/055127 WO2008106513A2 (en) 2007-02-28 2008-02-27 Induced current measurement systems and methods

Country Status (4)

Country Link
US (2) US7873412B2 (en)
EP (1) EP2129432B1 (en)
JP (1) JP4932914B2 (en)
WO (1) WO2008106513A2 (en)

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Publication number Priority date Publication date Assignee Title
CN107548507B (en) * 2015-05-05 2020-07-28 挪度医疗器械有限公司 Defibrillation training system

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US7873412B2 (en) * 2007-02-28 2011-01-18 Cardiac Pacemakers, Inc. Induced current measurement systems and methods
US9345888B2 (en) 2007-03-09 2016-05-24 Cardiac Pacemakers, Inc. MRI compatible implantable medical devices and methods
EP2338564B1 (en) * 2009-12-22 2013-03-27 BIOTRONIK CRM Patent AG MRI optocoupler
US8983606B2 (en) 2010-10-29 2015-03-17 Medtronic, Inc. Enhanced sensing by an implantable medical device in the presence of an interfering signal from an external source
US8744578B2 (en) * 2010-10-29 2014-06-03 Medtronic, Inc. Staged sensing adjustments by an implantable medical device in the presence of interfering signals
US10391320B2 (en) 2011-01-28 2019-08-27 Medtronic, Inc. Techniques for detecting magnetic resonance imaging field
US9272152B2 (en) 2011-08-31 2016-03-01 Cardiac Pacemakers, Inc. Remote programming of MRI settings of an implantable medical device
EP2572752A1 (en) * 2011-09-21 2013-03-27 BIOTRONIK SE & Co. KG Electrode catheter device
US9981124B2 (en) 2012-04-26 2018-05-29 Medtronic, Inc. Devices and techniques for detecting magnetic resonance imaging field
US9268003B2 (en) 2013-02-13 2016-02-23 Sunnybrook Health Sciences Centre System and method for measuring induced radio frequency current using phase contrast magnetic resonance imaging
US10672520B1 (en) * 2016-03-02 2020-06-02 AltaSim Technologies, LLC Precision medicine approach to improving patient safety and access to MRI

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107548507B (en) * 2015-05-05 2020-07-28 挪度医疗器械有限公司 Defibrillation training system

Also Published As

Publication number Publication date
EP2129432A2 (en) 2009-12-09
US20080208276A1 (en) 2008-08-28
US20110084714A1 (en) 2011-04-14
US7873412B2 (en) 2011-01-18
EP2129432B1 (en) 2013-01-02
US8014856B2 (en) 2011-09-06
JP4932914B2 (en) 2012-05-16
JP2010519967A (en) 2010-06-10
WO2008106513A2 (en) 2008-09-04

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