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MRI-guided endoscopy in the brain: a feasability study

M Scholz¹, M Deli, U Wildförster

¹Department of Neurosurgery, Ruhr-University Bochum, Germany.

Minimally Invasive Neurosurgery : MIN

|June 1, 1996

Summary

This study presents a novel real-time navigation system for neuroendoscopy using an open MRI scanner. This approach overcomes limitations of conventional systems by accounting for tissue movement during cerebrospinal fluid (CSF) loss.

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Area of Science:

Neurosurgery
Medical Imaging
Endoscopy

Background:

Conventional neuronavigation systems struggle with tissue displacement due to cerebrospinal fluid (CSF) loss during neuroendoscopy.
Real-time navigation is crucial for accurate instrument guidance in minimally invasive neurosurgery.

Purpose of the Study:

To adapt an endoscopic system for use with an open Magnetic Resonance Imaging (MRI) scanner.
To develop a real-time navigation system for neuroendoscopy that compensates for tissue shifts.

Main Methods:

An endoscopic system was modified for integration with an open MRI.
A miniaturized laser guidance system projected anatomical planes onto a phantom.
A flexible microendoscope with a titanium wire marker was used in a human cadaver model within the open magnet.

Related Experiment Videos

Gradient echo sequences with 4.5-second image refresh rates guided the procedure.

Main Results:

The adapted system allowed for real-time visualization and guidance of the endoscope within the open MRI.
Endoscopic findings were correlated with corresponding MRI data.
The technical feasibility and conditions for this neuronavigation approach were evaluated.

Conclusions:

Open MRI can function as a real-time navigation system for neuroendoscopy under specific instrument and equipment conditions.
This technique offers a potential solution to the challenge of tissue movement in neuroendoscopic procedures.
Further development could enhance precision and applicability in clinical settings.