MRI-guided Endoscopy in the Brain: A Feasability Study

Authors:
  • MDM. Deli
    M. Deli
  • UWU. Wildförster
    U. Wildförster
  • KWK. Wentz
    K. Wentz
  • ARA. Recknagel
    A. Recknagel
  • HPH. Preuschoft
    H. Preuschoft
  • AHA. Harders
    A. Harders
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Abstract
For neuronavigation in neuroendoscopy conventional navigation systems cannot exclude tissue movements caused by loss of cerebrospinal fluid (CSF). Open MRI can serve as a real-time navigation system if special conditions of endoscopic instruments and equipment are followed. We adapted an endoscopic system to the MRI and installed a miniaturized laser guidance system to project the central transaxial and coronal planes onto the phantom. A human cadaveric model was examined with a flexible microendoscope marked with a titanium wire inside the open magnet. The procedures were guided by gradient echo sequences refreshing the image every 4.5 seconds to control position of the endoscope. Endoscopic and corresponding MRI-findings are presented. Results and technical conditions are discussed.