Optimization of postoperative computerized tomographic imaging in patients with the implanted Responsive Neurostimulation System (TM)
Department of Neurological Surgery, Columbia University College of Physicians and Surgeons, New York, NY, USA.Stereotactic and Functional Neurosurgery (Impact Factor: 2.02). 02/2008; 86(4):203-7. DOI: 10.1159/000131656
The Responsive Neurostimulation System is currently under investigation as a neurosurgical option for medically refractory epilepsy. The device produces significant metallic artifact on conventional axial CT scans, resulting in limited diagnostic imaging options for implanted patients. We have developed a strategy to overcome this technical difficulty utilizing optimized patient positioning, thin-slice image acquisition, and postprocessing image reconstruction with commercially available software. Significant improvements were noted in the severity of device-related metallic streak artifact on reconstructed axial images. In addition, thin-section data were successfully used to generate detailed three-dimensional reconstructions, providing for improved visualization of the stimulator and the intracranial position of attached electrodes.
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