MRI-guided endoscopy in the brain: a feasability study.
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.
Scholz
M
M
Department of Neurosurgery, Ruhr-University Bochum, Germany.
Deli
M
M
Wildförster
U
U
Wentz
K
K
Recknagel
A
A
Preuschoft
H
H
Harders
A
A
D016477:Artifacts; D001921:Brain / Q000033:anatomy & histology*; D019723:Endoscopes; D004724:Endoscopy / Q000379:methods*; D004867:Equipment Design; D005240:Feasibility Studies; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation; D014741:Video Recording