Induced Current Measurement Systems And Methods
First Claim
1. A measurement system for measuring induced current in an implantable medical device undergoing magnetic resonance imaging, the measurement system comprising:
- (i) a resistor connected in series with a conductive loop of the implantable medical device;
(ii) electronic circuitry configured to generate an electronic signal representative of a voltage differential across the resistor and to generate an optical signal corresponding to the electronic signal; and
(iii) a fiber optic cable configured to transmit the optical signal away from an area subject to magnetic resonance imaging.
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Accused Products
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.
44 Citations
22 Claims
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1. A measurement system for measuring induced current in an implantable medical device undergoing magnetic resonance imaging, the measurement system comprising:
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(i) a resistor connected in series with a conductive loop of the implantable medical device; (ii) electronic circuitry configured to generate an electronic signal representative of a voltage differential across the resistor and to generate an optical signal corresponding to the electronic signal; and (iii) a fiber optic cable configured to transmit the optical signal away from an area subject to magnetic resonance imaging. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A measurement system for measuring induced current in an implantable medical device undergoing magnetic resonance imaging, the measurement system comprising:
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(i) a resistor connected in series with a conductive loop of the implantable medical device; (ii) electronic circuitry configured to generate an electronic signal representative of a voltage differential across the resistor; and (iii) a transmitter for wirelessly transmitting the electronic signal away from an area subject to magnetic resonance imaging.
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14. A method of measuring an induced current in an implantable medical device undergoing magnetic resonance imaging, the method comprising:
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(i) generating an electronic signal representative of the voltage differential across a resistor connected in series with a conductive loop of the implantable medical device; (ii) converting the electronic signal to a corresponding optical signal; (iii) transmitting the optical signal through a fiber optic cable to an area not subject to magnetic resonance imaging; and (iv) receiving the optical signal in a computing device that is configured to record the signal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. An implantable medical device comprising:
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a pulse generator; a lead in communication with the pulse generator, the pulse generator and the lead forming part of a conductive loop; and an induced current sensor comprising a resistor connected in series with the conductive loop; and electronic circuitry configured to generate an electronic signal representative of a voltage differential across the resistor.
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Specification