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Magnetic resonance imaging needle antennas

  • US 7,551,953 B2
  • Filed: 08/12/2003
  • Issued: 06/23/2009
  • Est. Priority Date: 04/15/1999
  • Status: Expired due to Fees
First Claim
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1. An intracranial needle magnetic resonance imaging antenna system, comprising:

  • a probe shaft having a distal end and a proximal end, the distal end of the probe shaft having a hollow needle at a distalmost end sharpened for penetrating central nervous system tissue, wherein the probe shaft is tubular and comprises an open lumen extending axially through the distalmost sharpened end, and the probe shaft further comprising a first conductor;

    an insulator or dielectric covering the first conductor over at least the proximal portion of the probe shaft; and

    a second conductor covering the insulator or dielectric;

    wherein the first conductor, the insulator or dielectric, and the second conductor define a magnetic resonance imaging antenna, and wherein the first conductor defines the hollow needle with the open lumen and has sufficient rigidity to penetrate the tissue.

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