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Preliminary experience with interactive guided brain biopsies using a vertically opened 0.5-T MR system.

J P Schneider1, J Dietrich, S Lieberenz

  • 1Department of Diagnostic Radiology, University of Leipzig, Germany.

European Radiology
|April 2, 1999
PubMed
Summary
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This study shows that minimally invasive brain biopsies are feasible in an open magnetic resonance (MR) system. Interactive guidance using MR-compatible needles achieved accurate neuropathological diagnoses in most patients.

Area of Science:

  • Neurosurgery
  • Medical Imaging
  • Interventional Radiology

Background:

  • Minimally invasive brain biopsies are crucial for accurate neuropathological diagnosis.
  • Traditional stereotactic methods may have limitations in real-time guidance.
  • Open magnetic resonance (MR) systems offer unique advantages for interventional procedures.

Purpose of the Study:

  • To assess the feasibility and accuracy of brain biopsies conducted within a vertically opened MR system.
  • To evaluate the effectiveness of interactive, real-time guidance for biopsy procedures.

Main Methods:

  • Utilized an interventional 0.5-T MR system with an integrated tracking device.
  • Employed MR-compatible aspiration and side-cut needles.
  • Performed prospective diagnostic brain biopsies in 18 patients, guiding needles with gradient-echo sequences and confirming tip position with spin-echo images.

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Main Results:

  • Successful neuropathological diagnosis was achieved in 12 out of 18 patients.
  • Negative biopsies occurred in 6 cases, with 4 involving aspiration needles.
  • Interactive MR-guided biopsies in an open system demonstrated feasibility.

Conclusions:

  • Interactive MR-guided minimally invasive brain biopsies are feasible in an open MR system.
  • Side-cut needles yielded better diagnostic results than aspiration needles, particularly for contrast-enhancing lesions.
  • This technique offers a viable approach for obtaining diagnostic tissue samples in neuro-oncology.