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StereoEEG

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https://www.readbyqxmd.com/read/28482271/usefulness-of-stereoeeg-based-tailored-surgery-for-medial-temporal-lobe-epilepsy-preliminary-results-in-11-patients
#1
Yuichi Kubota, Taku Ochiai, Tomokatsu Hori, Takakazu Kawamata
OBJECTIVE: Surgical options for medial temporal lobe epilepsy (MTLE) include anterior temporal lobectomy (ATL) and selective amygdalohippocampectomy (SAH). Optimal criteria for choosing the appropriate surgical approach remain uncertain. This article reports 11 consecutive cases in which electrophysiological findings of stereoelectroencephalography (SEEG) were used to determine the optimal surgical approach. PATIENTS AND METHODS: Eleven consecutive patients with MTLE underwent SEEG evaluation and were placed in either the medial or the medial+lateral group based on the findings...
July 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/27931117/resection-planning-in-extratemporal-epilepsy-surgery-using-3d-multimodality-imaging-and-intraoperative-mri
#2
Mark Nowell, Rachel Sparks, Gergely Zombori, Anna Miserocchi, Roman Rodionov, Beate Diehl, Tim Wehner, Mark White, Sebastien Ourselin, Andrew McEvoy, John Duncan
Surgical resection in non-lesional, extratemporal epilepsy, informed by stereoEEG recordings, is challenging. There are no clear borders of resection, and the surgeon is often operating in deep areas of the brain that are difficult to access. We present a technical note where 3D multimodality image integration in EpiNav(TM) is used to build a planned resection model, based on a previous intracranial EEG evaluation. Intraoperative MRI is then used to ensure a complete resection of the planned model. As stereoEEG becomes more common in the presurgical evaluation of epilepsy, these tools will become increasingly important to facilitate targeted cortical resections...
December 8, 2016: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/27286266/a-pipeline-for-3d-multimodality-image-integration-and-computer-assisted-planning-in-epilepsy-surgery
#3
Mark Nowell, Roman Rodionov, Gergely Zombori, Rachel Sparks, Michele Rizzi, Sebastien Ourselin, Anna Miserocchi, Andrew McEvoy, John Duncan
Epilepsy surgery is challenging and the use of 3D multimodality image integration (3DMMI) to aid presurgical planning is well-established. Multimodality image integration can be technically demanding, and is underutilised in clinical practice. We have developed a single software platform for image integration, 3D visualization and surgical planning. Here, our pipeline is described in step-by-step fashion, starting with image acquisition, proceeding through image co-registration, manual segmentation, brain and vessel extraction, 3D visualization and manual planning of stereoEEG (SEEG) implantations...
May 20, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/25513567/seeg-trajectory-planning-combining-stability-structure-and-scale-in-vessel-extraction
#4
Maria A Zuluaga, Roman Rodionov, Mark Nowell, Sufyan Achhala, Gergely Zombori, Manuel Jorge Cardoso, Anna Miserocchi, Andrew W McEvoy, John S Duncan, Sébastien Ourselin
StereoEEG implantation is performed in patients with epilepsy to determine the site of the seizure onset zone. Intracranial haemorrhage is the most common complication associated to implantation carrying a risk that ranges from 0.6 to 2.7%, with significant associated morbidity. SEEG planning is done pre-operatively to identify avascular trajectories for the electrodes. In current practice neurosurgeons have no assistance in the planning of the electrode trajectories. There is great interest in developing computer assisted planning systems that can optimize the safety profile of electrode trajectories, maximizing the distance to critical brain structures...
2014: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/25485435/seeg-trajectory-planning-combining-stability-structure-and-scale-in-vessel-extraction
#5
Maria A Zuluaga, Roman Rodionov, Mark Nowell, Sufyan Achhala, Gergely Zombori, Manuel Jorge Cardoso, Anna Miserocchi, Andrew W McEvoy, John S Duncan, Sébastien Ourselin
StereoEEG implantation is performed in patients with epilepsy to determine the site of the seizure onset zone. Intracranial haemorrhage is the most common complication associated to implantation carrying a risk that ranges from 0.6 to 2.7%, with significant associated morbidity. SEEG planning is done pre-operatively to identify avascular trajectories for the electrodes. In current practice neurosurgeons have no assistance in the planning of the electrode trajectories. There is great interest in developing computer assisted planning systems that can optimize the safety profile of electrode trajectories, maximizing the distance to critical brain structures...
2014: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/25161004/a-novel-method-for-implementation-of-frameless-stereoeeg-in-epilepsy-surgery
#6
Mark Nowell, Roman Rodionov, Beate Diehl, Tim Wehner, Gergely Zombori, Jane Kinghorn, Sebastien Ourselin, John Duncan, Anna Miserocchi, Andrew McEvoy
BACKGROUND: Stereoelectroencephalography (SEEG) is an invasive diagnostic procedure in epilepsy surgery that is usually implemented with frame-based methods. OBJECTIVE: To describe a new technique of frameless SEEG and report a prospective case series at a single center. METHODS: Image integration and planning of electrode trajectories were performed preoperatively on specialized software and exported to a Medtronic S7 StealthStation. Trajectories were implemented by frameless stereotaxy using percutaneous drilling and bolt insertion...
December 2014: Neurosurgery
https://www.readbyqxmd.com/read/21096237/partial-directed-coherence-estimated-on-stereo-eeg-signals-in-patients-with-taylor-s-type-focal-cortical-dysplasia
#7
COMPARATIVE STUDY
Giulia Varotto, Silvana Franceschetti, Roberto Spreafico, Laura Tassi, Ferruccio Panzica
The study was aimed at evaluating the changes in dynamical connectivity, between interictal, preictal and ictal condition, among signals derived from StereoEEG recordings in patients with Taylor's type focal cortical dysplasia (FCD type-II), by means of Partial Directed Coherence and indexes derived from graph theory. Results showed that seizures are characterized by an increased synchronization, mainly within the regions involved in the generation of the epileptogenic activity. Our findings reveal that the proposed procedure can be considered a suitable techinque to properly identify the pathological synchronization mechanisms underlying seizure generation and to support the identification of the epileptogenic zone...
2010: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/20362416/interictal-high-frequency-oscillations-indicate-seizure-onset-zone-in-patients-with-focal-cortical-dysplasia
#8
Milan Brázdil, Josef Halámek, Pavel Jurák, Pavel Daniel, Robert Kuba, Jan Chrastina, Zdenek Novák, Ivan Rektor
Interictal high-frequency oscillations (HFO) were recently identified in recordings from depth macroelectrodes in epileptic patients. StereoEEG (SEEG) recordings were analyzed in four patients with medically intractable partial seizures due to focal cortical dysplasia type IIA. Characteristics of HFO within seizure onset zone (SOZ), irritative zone, and remote brain areas were investigated. Whilst the rate of occurrence for ripples (80-200 Hz) was significantly higher in recordings from within than outside the SOZ, the rate of fast ripples (200-450 Hz) was less reliable index of SOZ...
June 2010: Epilepsy Research
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