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Magnetic resonance guidance of a shaft to a target zone

  • US 9,968,277 B2
  • Filed: 04/04/2012
  • Issued: 05/15/2018
  • Est. Priority Date: 04/07/2011
  • Status: Active Grant
First Claim
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1. A medical system comprising:

  • a magnetic resonance imaging system for acquiring magnetic resonance data from a subject;

    an interventional device comprising a shaft, wherein the shaft includes a distal portion that is adapted for being inserted into the subject, and a proximal portion that remains external to the subject;

    a first magnetic resonance fiducial marker attached to the proximal portion of the shaft, the first magnetic resonance fiducial marker including;

    a toroidal magnetic resonance signal volume that provides a first signal when the toroidal magnetic resonance signal volume is exposed to magnetic resonance signals from the magnetic resonance imaging system, anda coil that is electromagnetically coupled to the toroidal magnetic resonance signal volumeand provides a second signal based on the first signal, wherein the shaft passes through a center point of the first magnetic fiducial marker;

    a processor; and

    a memory storing machine executable instructions for execution by the processor,wherein execution of the instructions cause the processor to acquire the magnetic resonance data, wherein execution of the instructions further cause the processor to reconstruct the magnetic resonance data into a magnetic resonance image, wherein execution of the instructions further cause the processor to receive a selection of a target volume within the magnetic resonance image,wherein execution of the instructions further cause the processor to repeatedly;

    acquire magnetic resonance location data from the second signal from the coil of the first magnetic resonance fiducial marker using the magnetic resonance imaging system, wherein the magnetic resonance location data is descriptive of a location of the toroidal magnetic resonance signal volume; and

    render a view on a display device indicating a position of at least the distal portion of the shaft relative to the target volume when the distal portion is inserted into the subject, wherein the view is determined using at least the magnetic resonance location data and a location of the target volume.

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