Simulation of magnetic field induced vibrations in implantable medical devices
First Claim
1. A method for simulating a mechanical response of an implantable medical device (IMD) to a first static magnetic field and a first gradient magnetic field slew rate, the method comprising:
- exposing the IMD to a second static magnetic field having a magnitude greater than the first static magnetic field;
generating a second gradient magnetic field at the IMD, wherein a product of the second static magnetic field and a second gradient magnetic field slew rate is substantially equal to or greater than a product of the first static magnetic field and the first gradient magnetic field slew rate;
storing data related to the mechanical response produced by the second static and gradient magnetic fields; and
reproducing the mechanical response based on the stored data.
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Abstract
A mechanical response of an implantable medical device (IMD) to a first static magnetic field and a first gradient magnetic field slew rate is simulated by exposing the IMD to a second static magnetic field having a magnitude greater than the first static magnetic field and generating a second gradient magnetic field at the IMD such that a product of the second static magnetic field and a second gradient magnetic field slew rate is substantially equal to a product of the first static magnetic field and the first gradient magnetic field slew rate.
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Citations
18 Claims
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1. A method for simulating a mechanical response of an implantable medical device (IMD) to a first static magnetic field and a first gradient magnetic field slew rate, the method comprising:
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exposing the IMD to a second static magnetic field having a magnitude greater than the first static magnetic field; generating a second gradient magnetic field at the IMD, wherein a product of the second static magnetic field and a second gradient magnetic field slew rate is substantially equal to or greater than a product of the first static magnetic field and the first gradient magnetic field slew rate; storing data related to the mechanical response produced by the second static and gradient magnetic fields; and reproducing the mechanical response based on the stored data. - View Dependent Claims (2, 3)
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4. A method for testing a vibration response of an implantable medical device (IMD) to a first static magnetic field and a first gradient magnetic field slew rate, the method comprising:
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simulating the vibration response by disposing the IMD in a second static magnetic field having a magnitude greater than the first static magnetic field and generating a second gradient magnetic field at the IMD such that a product of the second static magnetic field and a second gradient magnetic field slew rate is substantially equal to or greater than a product of the first static magnetic field and the first gradient magnetic field slew rate; and sensing the vibration response of a plurality of components within the the IMD to the second static magnetic field and the second gradient magnetic field. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A method for testing a reliability of a plurality of implantable medical devices (IMDs) in a magnetic resonance imaging (MRI) scanner that generates a first static magnetic field and a first gradient magnetic field, the method comprising:
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exposing an IMD in a second static magnetic field having a magnitude greater than the first static magnetic field; generating a second gradient magnetic field at the IMD, wherein a product of the second static and gradient magnetic fields is substantially equal to or greater than a product of the first static and gradient magnetic fields; characterizing a mechanical vibratory response of a plurality of components of the IMD to the second static magnetic field and the second gradient magnetic field; and reproducing the characterized mechanical vibratory response on the plurality of IMDs. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification