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Frameless stereotactic targeting devices: technical features, targeting errors and clinical results.

Gerlig Widmann1, Peter Schullian, Martin Ortler

  • 1Medical University of Innsbruck, SIP-Department for Microinvasive Therapy, Department of Radiology, Austria. gerlig.widmann@i-med.ac.at

The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS
|November 15, 2011
PubMed
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Frameless stereotactic targeting devices for brain biopsies and depth electrode placements offer accuracy comparable to traditional methods. These advanced systems provide reliable clinical results, enhancing neurosurgical procedures.

Area of Science:

  • Neurosurgery
  • Medical Devices
  • Stereotactic Surgery

Background:

  • Frameless stereotactic targeting devices are increasingly utilized for brain biopsies (BB) and depth electrode placements (DEP).
  • This review examines the technical aspects, accuracy, and clinical outcomes of these emerging technologies.

Purpose of the Study:

  • To comprehensively review the technical features of frameless stereotactic targeting devices.
  • To evaluate targeting errors and clinical results associated with these devices.
  • To compare frameless systems with traditional frame-based stereotaxy.

Main Methods:

  • A literature search was conducted on PubMed covering publications from 1995 to 2010.
  • Categorization of devices into modified stereotactic arcs, arm-based systems, and skull-affixed devices.

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  • Analysis of guidance technologies including navigation systems and prospective stereotaxy.

    • Main Results:

    • Mean targeting errors for BB ranged from 4.4 to 5.4 mm, and for DEP from 2.0 to 3.2 mm.
    • Diagnostic yield for BB was high, between 89-100%.
    • Clinical success rates for DEP reached 96-100%.

    Conclusions:

    • Frameless stereotactic targeting devices can achieve accuracy and clinical outcomes comparable to frame-based stereotaxy.
    • Understanding the specific advantages and disadvantages of each device type is crucial for optimal performance.
    • These devices represent a viable alternative for neurosurgical targeting procedures.