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MRI biopsy apparatus incorporating a sleeve and multi-function obturator

  • US 9,795,365 B2
  • Filed: 04/24/2013
  • Issued: 10/24/2017
  • Est. Priority Date: 05/21/2004
  • Status: Expired due to Fees
First Claim
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1. A targeting set for use in a minimally invasive magnetic resonance imaging (MRI) guided procedure for obtaining tissue samples of human breast tissue, the targeting set comprising:

  • (a) a cannula having an open distal end and an open proximal end sized for receiving a tissue biopsy device for obtaining tissue samples from a breast, wherein the cannula is formed of an MIRI compatible matetial, wherein the cannula further defines a lateral opening having a proximal end and a distal end, wherein the distal end of the lateral opening is proximate to the open distal end of the cannula, wherein the cannula further includes a longitudinal lumen communicating with the lateral opening and the open distal end, the lumen having a non-circular cross-section; and

    (b) an obturator, wherein the obturator is formed of an MRI compatible material, wherein the cannula is sized to receive the obturator for targeting purposes prior to receiving the biopsy device for obtaining tissue samples, the obturator having a tissue piercing distal end extending from the open distal end of the cannula when the obturator is inserted fully into the cannula, and the obturator having a recess proximate to the distal end of the obturator, wherein the recess includes a proximal end and a distal end, wherein the recess is positioned along a portion of the length of the obturator such that the proximal and distal ends of the recess are respectively adjacent to the proximal and distal ends of the lateral opening of the cannula when the obturator is inserted fully into the cannula, wherein the lateral opening of the cannula and the recess of the obturator together define a tissue receiving dug-out, wherein the tissue receiving dug-out is configured to receive tissue thereby providing a reference for locating the lateral opening of the cannula under MRI imaging.

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