The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform

Guangzhi Wang - One of the best experts on this subject based on the ideXlab platform.

  • EMBC - A stereotaxic image-guided surgical robotic system for Depth Electrode insertion.
    Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and, 2020
    Co-Authors: Fanle Meng, Hui Ding, Guangzhi Wang
    Abstract:

    : This article constructs a surgical robotic system for the stereotactic insertion of the Depth Electrodes for stereoelectroencephalogram (SEEG). The purpose is to increase the efficiency of the stereotactic insertion of the Electrodes. The registration method of this system is based on the noninvasive fiducial markers. After registration, the robotic system can locate all the preplanned Electrode trajectories automatically. The validation of this proposed system has been performed by testing the time consumption of the system workflow and measuring the positioning accuracy on phantoms. From the result, we conclude that this surgical robotic system can assist surgeons in performing the stereotactic insertion of the Depth Electrodes accurately and efficiently.

  • A stereotaxic image-guided surgical robotic system for Depth Electrode insertion
    2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2014
    Co-Authors: Fanle Meng, Hui Ding, Guangzhi Wang
    Abstract:

    This article constructs a surgical robotic system for the stereotactic insertion of the Depth Electrodes for stereoelectroencephalogram (SEEG). The purpose is to increase the efficiency of the stereotactic insertion of the Electrodes. The registration method of this system is based on the noninvasive fiducial markers. After registration, the robotic system can locate all the preplanned Electrode trajectories automatically. The validation of this proposed system has been performed by testing the time consumption of the system workflow and measuring the positioning accuracy on phantoms. From the result, we conclude that this surgical robotic system can assist surgeons in performing the stereotactic insertion of the Depth Electrodes accurately and efficiently.

  • cerebrovascular segmentation and planning of Depth Electrode insertion for epilepsy surgery
    Computer Assisted Radiology and Surgery, 2013
    Co-Authors: Xiaofei Du, Wenjing Zhou, Guangming Zhang, Hui Ding, Guangzhi Wang
    Abstract:

    Purpose Depth Electrodes are inserted in the brain to locate the epileptogenic zone without craniotomy, but there is risk of surgical hemorrhage. Preoperative planning is required to mitigate this risk. A preoperative imaging, segmentation and three dimensional (3D) visualization procedure was developed to provide neurosurgeons with cortical and vascular anatomy information for surgical planning and neuronavigation.

  • cortical vessel imaging and visualization for image guided Depth Electrode insertion
    Computerized Medical Imaging and Graphics, 2013
    Co-Authors: Xiaofei Du, Wenjing Zhou, Guangming Zhang, Hui Ding, Guangzhi Wang
    Abstract:

    Abstract To avoid intracranial hemorrhage during minimally invasive Depth Electrode insertion without craniotomy for epilepsy surgery, precise in vivo imaging of cortical vessel and relevant rendering methods are critical, and should be used in preoperative planning. In this study, a non-invasive phase contrast MR angiography (PC-MRA) method was chosen for cortical vessel imaging. After image pre-processing (registration and segmentation), three visualization methods were implemented to optimize the vessel imaging and brain tissue rendering for surgical planning. The processed results were evaluated by comparing with intraoperative photographs. The results showed occurrences of missing vessels between imaging and photos (18.3%, 6 cases), but these could be compensated by realistic sulci visualization methods. The results showed 3D texture mapping to be the most suitable cortex visualization method for use in surgical navigation. Based on the methods and evaluations, a new surgical planning system and criteria of usage were developed with input from the surgeons’ experience using the prototype system. This system could greatly help reduce the risk of the intracranial hemorrhage during Electrode insertion and also avoid potential risks caused by contrast agent injections for contrast enhanced MRA or CTA.

David W. Roberts - One of the best experts on this subject based on the ideXlab platform.

  • Occipitotemporal hippocampal Depth Electrodes in intracranial epilepsy monitoring: safety and utility.
    Journal of Neurosurgery, 2012
    Co-Authors: Kimon Bekelis, Atman Desai, Alex Kotlyar, Vijay M. Thadani, Barbara C. Jobst, Krzysztof A. Bujarski, Terrance M. Darcey, David W. Roberts
    Abstract:

    Object Intracranial monitoring for epilepsy has been proven to enhance diagnostic accuracy and provide localizing information for surgical treatment of intractable seizures. The authors investigated the usefulness of hippocampal Depth Electrodes in the era of more advanced imaging techniques. Methods Between 1988 and 2010, 100 patients underwent occipitotemporal hippocampal Depth Electrode (OHDE) implantation as part of invasive seizure monitoring, and their charts were retrospectively reviewed. The authors' technique involved the stereotactically guided (using the Leksell model G frame) implantation of a 12-contact Depth Electrode directed along the long axis of the hippocampus, through an occipital twist drill hole. Results Of the 100 patients (mean age 35.0 years [range 13–58 years], 51% male) who underwent intracranial investigation, 84 underwent resection of the seizure focus. Magnetic resonance imaging revealed mesial temporal sclerosis (MTS) in 27% of patients, showed abnormal findings without MTS ...

  • stereotactic Depth Electrode investigation of the insula in the evaluation of medically intractable epilepsy
    Journal of Neurosurgery, 2011
    Co-Authors: Atman Desai, Vijay M. Thadani, Barbara C. Jobst, Krzysztof A. Bujarski, Terrance M. Darcey, Karen Gilbert, David W. Roberts
    Abstract:

    Object The authors describe their experience with stereotactic implantation of insular Depth Electrodes in patients with medically intractable epilepsy. Methods Between 2001 and 2009, 20 patients with epilepsy and suspected insular involvement during seizures underwent intracranial Electrode array implantation at the authors' institution. All patients had either 1 or 2 insular Depth Electrodes placed as part of an intracranial array. Results A total of 29 insular Depth Electrodes were placed using a frontal oblique trajectory. Eleven patients had a single insular Electrode placed and 8 patients had 2 insular Electrodes placed unilaterally. One patient had bilateral insular Electrodes implanted. Postoperative imaging demonstrated satisfactory placement in all but 1 instance, and there was no associated morbidity or mortality. Fourteen patients underwent a subsequent resection, involving the frontal lobe (9 patients), temporal lobe (4), or frontotemporal lobes (1), and of these, 11 currently have Engel Clas...

  • robotic image guided Depth Electrode implantation in the evaluation of medically intractable epilepsy
    Neurosurgical Focus, 2008
    Co-Authors: William J Spire, Peter D Williamson, Vijay M. Thadani, Barbara C. Jobst, Terrance M. Darcey, David W. Roberts
    Abstract:

    Object. The authors describe their experience with a technique for robotic implantation of Depth Electrodes in patients concurrently undergoing craniotomy and placement of subdural monitoring Electrodes for the evaluation of intractable epilepsy. Methods. Patients included in this study underwent evaluation in the Dartmouth Surgical Epilepsy Program and were recommended for invasive seizure monitoring with Depth Electrodes between 2006 and the present. In all cases an image-guided robotic system was used during craniotomy for concurrent subdural grid Electrode placement. A total of 7 Electrodes were placed in 4 patients within the time period. Results. Three of 4 patients had successful localization of seizure onset, and 2 underwent subsequent resection. Of the patients who underwent resection, 1 is now seizure free, and the second has only auras. There was 1 complication after subpial grid placement but no complications related to the Depth Electrodes. Conclusions. Robotic image-guided placement of Depth Electrodes with concurrent craniotomy is feasible, and the technique is safe, accurate, and efficient. (DOI: 10.3171/FOC/2008/25/9/E19)

  • Robotic image-guided Depth Electrode implantation in the evaluation of medically intractable epilepsy
    Neurosurgical Focus, 2008
    Co-Authors: William J Spire, Peter D Williamson, Vijay M. Thadani, Barbara C. Jobst, Terrance M. Darcey, David W. Roberts
    Abstract:

    Object The authors describe their experience with a technique for robotic implantation of Depth Electrodes in patients concurrently undergoing craniotomy and placement of subdural monitoring Electrodes for the evaluation of intractable epilepsy. Methods Patients included in this study underwent evaluation in the Dartmouth Surgical Epilepsy Program and were recommended for invasive seizure monitoring with Depth Electrodes between 2006 and the present. In all cases an image-guided robotic system was used during craniotomy for concurrent subdural grid Electrode placement. A total of 7 Electrodes were placed in 4 patients within the time period. Results Three of 4 patients had successful localization of seizure onset, and 2 underwent subsequent resection. Of the patients who underwent resection, 1 is now seizure free, and the second has only auras. There was 1 complication after subpial grid placement but no complications related to the Depth Electrodes. Conclusions Robotic image-guided placement of Depth ele...

Hui Ding - One of the best experts on this subject based on the ideXlab platform.

  • EMBC - A stereotaxic image-guided surgical robotic system for Depth Electrode insertion.
    Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and, 2020
    Co-Authors: Fanle Meng, Hui Ding, Guangzhi Wang
    Abstract:

    : This article constructs a surgical robotic system for the stereotactic insertion of the Depth Electrodes for stereoelectroencephalogram (SEEG). The purpose is to increase the efficiency of the stereotactic insertion of the Electrodes. The registration method of this system is based on the noninvasive fiducial markers. After registration, the robotic system can locate all the preplanned Electrode trajectories automatically. The validation of this proposed system has been performed by testing the time consumption of the system workflow and measuring the positioning accuracy on phantoms. From the result, we conclude that this surgical robotic system can assist surgeons in performing the stereotactic insertion of the Depth Electrodes accurately and efficiently.

  • A stereotaxic image-guided surgical robotic system for Depth Electrode insertion
    2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2014
    Co-Authors: Fanle Meng, Hui Ding, Guangzhi Wang
    Abstract:

    This article constructs a surgical robotic system for the stereotactic insertion of the Depth Electrodes for stereoelectroencephalogram (SEEG). The purpose is to increase the efficiency of the stereotactic insertion of the Electrodes. The registration method of this system is based on the noninvasive fiducial markers. After registration, the robotic system can locate all the preplanned Electrode trajectories automatically. The validation of this proposed system has been performed by testing the time consumption of the system workflow and measuring the positioning accuracy on phantoms. From the result, we conclude that this surgical robotic system can assist surgeons in performing the stereotactic insertion of the Depth Electrodes accurately and efficiently.

  • cerebrovascular segmentation and planning of Depth Electrode insertion for epilepsy surgery
    Computer Assisted Radiology and Surgery, 2013
    Co-Authors: Xiaofei Du, Wenjing Zhou, Guangming Zhang, Hui Ding, Guangzhi Wang
    Abstract:

    Purpose Depth Electrodes are inserted in the brain to locate the epileptogenic zone without craniotomy, but there is risk of surgical hemorrhage. Preoperative planning is required to mitigate this risk. A preoperative imaging, segmentation and three dimensional (3D) visualization procedure was developed to provide neurosurgeons with cortical and vascular anatomy information for surgical planning and neuronavigation.

  • cortical vessel imaging and visualization for image guided Depth Electrode insertion
    Computerized Medical Imaging and Graphics, 2013
    Co-Authors: Xiaofei Du, Wenjing Zhou, Guangming Zhang, Hui Ding, Guangzhi Wang
    Abstract:

    Abstract To avoid intracranial hemorrhage during minimally invasive Depth Electrode insertion without craniotomy for epilepsy surgery, precise in vivo imaging of cortical vessel and relevant rendering methods are critical, and should be used in preoperative planning. In this study, a non-invasive phase contrast MR angiography (PC-MRA) method was chosen for cortical vessel imaging. After image pre-processing (registration and segmentation), three visualization methods were implemented to optimize the vessel imaging and brain tissue rendering for surgical planning. The processed results were evaluated by comparing with intraoperative photographs. The results showed occurrences of missing vessels between imaging and photos (18.3%, 6 cases), but these could be compensated by realistic sulci visualization methods. The results showed 3D texture mapping to be the most suitable cortex visualization method for use in surgical navigation. Based on the methods and evaluations, a new surgical planning system and criteria of usage were developed with input from the surgeons’ experience using the prototype system. This system could greatly help reduce the risk of the intracranial hemorrhage during Electrode insertion and also avoid potential risks caused by contrast agent injections for contrast enhanced MRA or CTA.

Fanle Meng - One of the best experts on this subject based on the ideXlab platform.

  • EMBC - A stereotaxic image-guided surgical robotic system for Depth Electrode insertion.
    Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and, 2020
    Co-Authors: Fanle Meng, Hui Ding, Guangzhi Wang
    Abstract:

    : This article constructs a surgical robotic system for the stereotactic insertion of the Depth Electrodes for stereoelectroencephalogram (SEEG). The purpose is to increase the efficiency of the stereotactic insertion of the Electrodes. The registration method of this system is based on the noninvasive fiducial markers. After registration, the robotic system can locate all the preplanned Electrode trajectories automatically. The validation of this proposed system has been performed by testing the time consumption of the system workflow and measuring the positioning accuracy on phantoms. From the result, we conclude that this surgical robotic system can assist surgeons in performing the stereotactic insertion of the Depth Electrodes accurately and efficiently.

  • A stereotaxic image-guided surgical robotic system for Depth Electrode insertion
    2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2014
    Co-Authors: Fanle Meng, Hui Ding, Guangzhi Wang
    Abstract:

    This article constructs a surgical robotic system for the stereotactic insertion of the Depth Electrodes for stereoelectroencephalogram (SEEG). The purpose is to increase the efficiency of the stereotactic insertion of the Electrodes. The registration method of this system is based on the noninvasive fiducial markers. After registration, the robotic system can locate all the preplanned Electrode trajectories automatically. The validation of this proposed system has been performed by testing the time consumption of the system workflow and measuring the positioning accuracy on phantoms. From the result, we conclude that this surgical robotic system can assist surgeons in performing the stereotactic insertion of the Depth Electrodes accurately and efficiently.

Thomas R Henry - One of the best experts on this subject based on the ideXlab platform.

  • intracerebral Depth Electrode monitoring in partial epilepsy the morbidity and efficacy of placement using magnetic resonance image guided stereotactic surgery
    Neurosurgery, 1996
    Co-Authors: Donald A Ross, James A Brunberg, Ivo Drury, Thomas R Henry
    Abstract:

    OBJECTIVE : To determine the indications for, efficacy of, and safety of Depth Electrode placement using magnetic resonance imaging (MRI)-guided stereotactic surgery in patients with intractable epilepsy. METHODS : We analyzed retrospectively the results of Depth Electrode usage in 50 consecutive patients at the University of Michigan Hospitals studied in the years 1991 through 1994, using MRI-guided stereotactic implantation, in conjunction with simultaneous subdural strip Electrode recordings. RESULTS : There were no deaths, no infections, and no new neurological deficits. One small subdural hematoma adjacent to a subdural strip Electrode was evacuated to prevent interference with ictal recording. Two cylindrical subdural Electrodes were found to be intraparenchymal, as revealed by postoperative MRI, and were removed. One patient was unintentionally left alone briefly, and he pulled out the Electrodes while confused postictally, requiring a subsequent operation for replacement. Ictal onset zones were successfully localized in 47 patients. CONCLUSION : We have found intracerebral Electrode placement to be as safe as subdural strip Electrode placement and have found combined Depth and strip Electrode monitoring to be highly effective in localizing the onset zones of complex partial seizures. Intracranial monitoring was particularly useful in the detection of a single ictal onset zone in the absence of neuroimaging abnormality and in the definitive diagnosis of bilateral independent ictal onset zones in the temporal lobe epilepsy syndrome. The specific technical aspects of the procedure that contribute to a successful outcome are reviewed. A comparison with earlier reported series suggests that MRI-guided stereotaxy and pial inspection may reduce complications of Depth Electrode placement.

  • presurgical evaluation for partial epilepsy relative contributions of chronic Depth Electrode recordings versus fdg pet and scalp sphenoidal ictal eeg
    Neurology, 1990
    Co-Authors: Jerome Engel, Thomas R Henry, M W Risinger, John C Mazziotta, W W Sutherling, M F Levesque, Michael E Phelps
    Abstract:

    One hundred fifty-three patients with medically refractory partial epilepsy underwent chronic stereotactic Depth-Electrode EEG (SEEG) evaluations after being studied by positron emission tomography (PET) with 18 F-fluorodeoxyglucose (FDG) and scalp-sphenoidal EEG telemetry. We carried out retrospective standardized reviews of local cerebral metabolism and scalp-sphenoidal ictal onsets to determine when SEEG recordings revealed additional useful information. FDG-PET localization was misleading in only 3 patients with temporal lobe SEEG ictal onsets for whom extratemporal or contralateral hypometabolism could be attributed to obvious nonepileptic structural defects. Two patients with predominantly temporal hypometabolism may have had frontal epileptogenic regions, but ultimate localization remains uncertain. Scalp-sphenoidal ictal onsets were misleading in 5 patients. For 37 patients with congruent focal scalp-sphenoidal ictal onsets and temporal hypo-metabolic zones, SEEG recordings never demonstrated extratemporal or contralateral epileptogenic regions; however, 3 of these patients had nondiagnostic SEEG evaluations. The results of subsequent subdural grid recordings indicated that at least 1 of these patients may have been denied beneficial surgery as a result of an equivocal SEEG evaluation. Weighing risks and benefits, it is concluded that anterior temporal lobectomy is justified without chronic intracranial recording when specific criteria for focal scalp-sphenoidal ictal EEG onsets are met, localized hypometabolism predominantly involves the same temporal lobe, and no other conflicting information has been obtained from additional tests of focal functional deficit, structural imaging, or seizure semiology.