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Stereotactics apparatus

  • US 4,923,459 A
  • Filed: 09/13/1988
  • Issued: 05/08/1990
  • Est. Priority Date: 09/14/1987
  • Status: Expired due to Fees
First Claim
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1. A stereotactics apparatus which is adapted to utilize tomographic imaging means for photographing a predetermined portion of a patient to display a tomographic image of the predetermined portion so as to designate a surgical target of the predetermined portion on the basis of the tomographic image, comprising:

  • frame means having a frame coordinate system and fixed in the predetermined portion such that the predetermined portion is located within the frame coordinate system; and

    means for calculating the coordinates of the surgical target in the frame coordinate system, said calculating means being provided with a marker member, said marker member being fixed on said frame means so that said marker member is adjacent to the predetermined portion and located within the frame coordinate system, said marker member being adapted to be tomographically imaged together with said predetermined portion by said imaging means and being adapted to be displayed as marker image together with the tomographic image of the predetermined portion, whereby the frame coordinate system is reconstructed on the basis of the displayed marker image, so that the tomographic image of the predetermined portion is located within the reconstructed frame coordinate system and coordinates of the surgical target are calculated on the basis of the reconstructed frame coordinate system,wherein said frame means includes a curved surface having a concave shape toward the predetermined portion, and said marker member is spirally extending along the curved surface.

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