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[Sensor-based detection of skull positioning for image-guided cranial navigation under free head mobility]
O Suess1, S Schönherr, A Schilling
1Neurochirurgische Klinik, Charité -- Universitätsmedizin Berlin, Campus Benjamin Franklin. olaf.suess@charite.de
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|June 24, 2005
Summary
This study introduces a dynamic reference frame (DRF) for cranial navigation, enabling free head mobility during neurosurgery. The DRF system allows for continuous adaptation of imaging data to head movements, improving surgical navigation accuracy.
Area of Science:
- Neurosurgery
- Medical Imaging
- Surgical Navigation
Background:
- Traditional stereotactic surgery often requires rigid head fixation.
- Existing computer- and image-guided systems offer improvements but may still necessitate immobilization.
- This limits the scope of navigation in certain neurosurgical procedures.
Purpose of the Study:
- To describe the clinical application of a novel technical modification for cranial navigation.
- To enable "free head mobility" during neurosurgical procedures using CT and MR imaging.
- To utilize 3-D reconstruction models with enhanced navigation capabilities.
Main Methods:
- An electromagnetic neuronavigation system was adapted to monitor multiple sensors.
- A dynamic reference frame (DRF) was implemented using a dental splint as an additional reference.
- The system continuously adapted imaging planes and 3-D reconstructions to the patient's cranial movements.
Main Results:
- The DRF system was tested in various neurosurgical procedures, including biopsies, endoscopic interventions, and tumor removals.
- High accuracy was achieved for intracranial and skull-based target reference points, even after head movement.
- Image-guided navigation was successful without rigid head fixation due to continuous data adaptation.
Conclusions:
- The dynamic reference frame (DRF) shows significant clinical potential for cranial navigation.
- DRF technology aims to eliminate the need for rigid head fixation, expanding navigation applications.
- This allows for interventions where pin fixation is undesirable and ensures automatic correction for head position changes.