Acta neurochirurgica
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Acta neurochirurgica · Dec 2010
Comparative StudyIs MRI a reliable tool to locate the electrode after deep brain stimulation surgery? Comparison study of CT and MRI for the localization of electrodes after DBS.
MRI has been utilized to localize the electrode after deep brain stimulation, but its accuracy has been questioned due to image distortion. Under the hypothesis that MRI is not adequate for evaluation of electrode position after deep brain stimulation, this study is aimed at validating the accuracy of MRI in electrode localization in comparison with CT scan. ⋯ The results suggest that there was significant discrepancy between the centers of electrodes estimated by CT and MRI after STN DBS surgery.
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Acta neurochirurgica · Dec 2010
Comparative StudyComparison of electrode location between immediate postoperative day and 6 months after bilateral subthalamic nucleus deep brain stimulation.
We compared the electrode positions of subthalamic nucleus (STN) deep brain stimulation (DBS) estimated at the immediate postoperative period with those estimated 6 months after surgery. ⋯ The electrode positions in the immediate postoperative CT might have significant discrepancies with those in the CT taken at a stable period after STN DBS especially when there is a large amount of pneumocephalus.
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Acta neurochirurgica · Dec 2010
Diffusion tensor imaging (DTI) and colored fractional anisotropy (FA) mapping of the subthalamic nucleus (STN) and the globus pallidus interna (GPi).
The subthalamic nucleus (STN) and the globus pallidus internus (GPi) are the most common surgical targets for the treatment of Parkinson's disease. We studied directionally colored fractional anisotropy (FA) and diffusion tensor imaging (DTI) sequences to better target these anatomical regions. ⋯ Colored FA maps allow a potential method to identify the STN and GPi accurately. DTI has proven to be a powerful tool that can be used to augment identification of the STN nucleus and GPi used for stereotactic surgery.
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Acta neurochirurgica · Dec 2010
Case ReportsPreserved cognition after deep brain stimulation (DBS) in the subthalamic area for Parkinson's disease: a case report.
At present, subthalamic nucleus (STN) stimulation is the preferred procedure for the amelioration of motor symptoms in medication refractory Parkinson's disease. Results are however impaired by negative impacts on mood, cognition, incentive, and social judgment. ⋯ We describe a case with stimulation of subthalamic fibre tracts that showed clear improvement of cognitive and social abilities. Avoiding the STN may be advantageous in progressive Parkinson's disease to avoid non-motor complications and enhance quality of life.
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Acta neurochirurgica · Dec 2010
Comparative StudyPostoperative MRI examinations in patients treated by deep brain stimulation using a non-standard protocol.
MRI in patients bearing deep brain stimulation (DBS) electrodes may induce cerebral lesions due to electrode heating. To avoid neurological deficits related to MRI, post-operative MRI protocol was installed in our institution. However, our protocol comprised a higher specific absorption rate (SAR) and different positioning of lead excess than the later released electrode manufacturer's guidelines. The objective was to evaluate the safety using this protocol. ⋯ No complications were observed using this MRI protocol in DBS patients. Our results suggest that, within this setting, higher SAR values may be feasible for DBS patients than in the manufacturer's guidelines.