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Related Experiment Videos

Neuronavigation in intraoperative MRI.

E Samset1, H Hirschberg

  • 1Interventional Center, Rikshospitalet, University of Oslo, Norway. eigil.samset@klinmed.uio.no

Computer Aided Surgery : Official Journal of the International Society for Computer Aided Surgery
|November 24, 1999
PubMed
Summary
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This study introduces an integrated image-guided surgical system combining frameless stereotactic technology with intraoperative magnetic resonance imaging (MRI). The system enhances surgical accuracy and efficiency by overcoming brain shift issues common in neuronavigation.

Area of Science:

  • Neurosurgery
  • Medical Imaging
  • Surgical Navigation

Background:

  • Conventional frameless stereotactic systems face limitations due to intraoperative brain shift.
  • Intraoperative magnetic resonance imaging (MRI) offers real-time imaging but can be cumbersome.
  • Integrating these technologies aims to leverage their respective strengths for improved surgical outcomes.

Purpose of the Study:

  • To develop and implement an integrated image-guided surgical system.
  • To combine frameless stereotactic systems with a superconductive intraoperative MRI scanner.
  • To overcome the disadvantage of intraoperative brain shift in neuronavigation.

Main Methods:

  • An integrated system comprising a 0.5-T MRI scanner and a neuronavigation computer was developed.

Related Experiment Videos

  • An emulation program linked the MRI scanner and neuronavigation computer.
  • The system utilized in-bore infrared cameras and flexible surface coils for interactive surgical neuronavigation.

    • Main Results:

    • Phantom studies indicated superior navigational accuracy compared to conventional methods.
    • Initial clinical application in 17 cases (16 craniotomies, 1 biopsy) showed reduced operative duration.
    • The system demonstrated increased utilization of interactive image guidance and better surgical progress assessment.

    Conclusions:

    • The integrated system demonstrates clinical usefulness for image-guided surgery.
    • Intraoperative MRI significantly mitigates neuronavigation inaccuracy caused by target shift.
    • Performing surgery within the MRI scanner's imaging volume and patient immobilization eliminate transport and re-registration issues.