Mammograph provided with an improved needle carrier

  • US 5,219,351 A
  • Filed: 10/23/1991
  • Issued: 06/15/1993
  • Est. Priority Date: 10/24/1990
  • Status: Expired due to Term
First Claim
Patent Images

1. A mammograph comprising:

  • means for holding a breast of a patient between an X-ray tube and a device for taking X-ray exposures;

    means for taking stereographic exposures of the breast;

    biopsy or surgical guidance means for acting on the breast at a determined location;

    said biopsy or surgical guidance means including a needle carrier which is displaceable relative to the breast;

    said needle carrier including a needle whose tip is displaceable along a selected length between a retracted position and an inserted position; and

    stereotaxic means associated with the above three means to calculate the position of a determined location at which action is to be taken;

    wherein the mammograph includes;

    pointing means for enabling the needle carrier to be pointable towards an isocenter situated at the determined location;

    said pointing means including a circular arc itself carried by a rotary shaft to provide two degrees of freedom in pointing the needle wherein the circular arc has a center of curvature which lies on the axis of the shaft carrying the circular arc.

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