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MRI-guided endoscopy in the brain: a feasability study

M Scholz1, M Deli, U Wildförster

  • 1Department of Neurosurgery, Ruhr-University Bochum, Germany.

Minimally Invasive Neurosurgery : MIN
|June 1, 1996
PubMed
Summary
This summary is machine-generated.

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This study presents a novel real-time navigation system for neuroendoscopy using an open MRI scanner. This approach overcomes limitations of conventional systems by accounting for tissue movement during cerebrospinal fluid (CSF) loss.

Area of Science:

  • Neurosurgery
  • Medical Imaging
  • Endoscopy

Background:

  • Conventional neuronavigation systems struggle with tissue displacement due to cerebrospinal fluid (CSF) loss during neuroendoscopy.
  • Real-time navigation is crucial for accurate instrument guidance in minimally invasive neurosurgery.

Purpose of the Study:

  • To adapt an endoscopic system for use with an open Magnetic Resonance Imaging (MRI) scanner.
  • To develop a real-time navigation system for neuroendoscopy that compensates for tissue shifts.

Main Methods:

  • An endoscopic system was modified for integration with an open MRI.
  • A miniaturized laser guidance system projected anatomical planes onto a phantom.
  • A flexible microendoscope with a titanium wire marker was used in a human cadaver model within the open magnet.

Related Experiment Videos

  • Gradient echo sequences with 4.5-second image refresh rates guided the procedure.

    • Main Results:

    • The adapted system allowed for real-time visualization and guidance of the endoscope within the open MRI.
    • Endoscopic findings were correlated with corresponding MRI data.
    • The technical feasibility and conditions for this neuronavigation approach were evaluated.

    Conclusions:

    • Open MRI can function as a real-time navigation system for neuroendoscopy under specific instrument and equipment conditions.
    • This technique offers a potential solution to the challenge of tissue movement in neuroendoscopic procedures.
    • Further development could enhance precision and applicability in clinical settings.