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Computer-assisted image-guided surgery using the Regulus Navigator.

J S Rousu1, P E Kohls, B Kall

  • 1COMPASS International, Inc., Rochester, Minnesota USA.

Studies in Health Technology and Informatics
|December 8, 1997
PubMed
Summary
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Frameless image-guided surgery, utilizing magnetic field technology, offers a viable and accurate tool for surgeons. This technology enables precise patient anatomy registration and instrument tracking during operations, proving manageable in clinical settings.

Area of Science:

  • Neurosurgery
  • Medical Technology
  • Surgical Navigation

Background:

  • Frameless image-guided surgery has emerged as a significant advancement in surgical procedures.
  • Technologies include robotic arms, infra-red cameras, ultrasound, and magnetic field digitizers.
  • Magnetic field technology offers a novel approach to surgical navigation.

Purpose of the Study:

  • To evaluate the viability and accuracy of magnetic field-based frameless image-guided surgery using the Regulus Navigator.
  • To demonstrate the integration and progression from framed to frameless magnetic systems.
  • To assess the clinical performance and accuracy of intraoperative registration.

Main Methods:

  • Patient anatomy was registered to preoperative radiological data (CT/MRI).

Related Experiment Videos

  • Surgical instruments were tracked using interactive displays.
  • A clinical trial involving 221 patients was conducted.
  • Magnetic field technology was integrated and tested, progressing from a hybrid to a standalone frameless system.

    • Main Results:

    • The Regulus Navigator, using magnetic field technology, proved to be a viable and accurate surgical tool.
    • A clinical trial of 221 patients achieved a mean accuracy of 2.56 mm (SD 1.15 mm) for intraoperative registration.
    • Concerns regarding electromagnetic interference were managed effectively, maintaining acceptable accuracy.

    Conclusions:

    • Magnetic field-based frameless image-guided surgery is a clinically effective and accurate navigation method.
    • The technology is adaptable to various surgical techniques and instruments.
    • Potential challenges like electromagnetic interference are manageable in the operating room environment.