The role of automatic computer-aided surgical trajectory planning in improving the expected safety of stereotactic neurosurgery

Abstract Purpose Minimal invasion computer-assisted neurosurgical procedures with various tool insertions into the brain may carry hemorrhagic risks and neurological deficits. The goal of this study is to investigate the role of computer-based surgical trajectory planning tools in improving the…

Validation of a stereo camera system to quantify brain deformation due to breathing and pulsatility

Abstract Purpose: A new stereo vision system is presented to quantify brain shift and pulsatility in open-skull neurosurgeries. Methods: The system is endowed with hardware and software synchronous image acquisition with timestamp embedding in the captured images, a brain surface…

Brain Tissue Deformation Tracking with a Paraboloid Model for Outlier Detection

Abstract This paper describes a new method for real-time quantification of brain shift during craniotomy surgery. Our method estimates the deformation on the visible surface of the brain by tracking the 3D location of automatically selected points on the brain…

Deep brain stimulation surgery time reduction based on the automatic detection of the subthalamic nucleus: method and preliminary results

Abstract. Deep brain stimulation (DBS) surgery of the subthalamic nucleus (STN) is an effective therapy in the management of the motor symptoms of advanced Parkinson’s disease (PD). The accurate localization of the STN is essential to achieve an optimal outcome…

Microelectrode Recording Duration and Spatial Density Constraints for Automatic Targeting of the Subthalamic Nucleus

Abstract Background: Accurate detection of the boundaries of the subthalamic nucleus (STN) in deep brain stimulation (DBS) surgery using microelectrode recording (MER) is considered to refine localization and may therefore improve clinical outcome. However, MER tends to extend operation time…

Planning safe trajectories in image-guided keyhole neurosurgery

Abstract Many image-guided keyhole neurosurgery procedures require the precise targeting of tumors and anatomical structures with a surgical tool inside the brain based on pre-operative CT/MRI images. A misplacement of the surgical tool from the planned trajectory may result severe…

Reduced risk trajectory planning in image-guided keyhole neurosurgery

Abstract Purpose: The authors present and evaluate a new preoperative planning method and computer software designed to reduce the risk of candidate trajectories for straight rigid tool insertion in image-guided keyhole neurosurgery. Methods: Trajectories are computed based on the surgeon-defined…

Fiducial Optimization for Minimal Target Registration Error in Image-Guided Neurosurgery

Abstract This paper presents new methods for the optimal selection of anatomical landmarks and optimal placement of fiducial markers in image-guided neurosurgery. These methods allow the surgeon to optimally plan fiducial marker locations on routine diagnostic images before preoperative imaging…

Target and Trajectory Clinical Application Accuracy in Neuronavigation

Abstract BACKGROUND: Catheter, needle, and electrode misplacement in navigated neurosurgery can result in ineffective treatment and severe complications. OBJECTIVE: To assess the Ommaya ventricular catheter localization accuracy both along the planned trajectory and at the target. METHODS: We measured the…

Trajectory Planning with Augmented Reality for Improved Risk Assesment in Image-guided Keyhole Neurosurgery

Abstract We present a new preoperative planning method for reducing the risk associated with the insertion of straight tools in image-guided keyhole neurosurgery. The method quantifies the risks of multiple candidate trajectories and presents them on a physical model of…

Plexiform Neurofibroma tissue classification

Abstract Plexiform Neurofibroma (PN) is a major complication of NeuroFibromatosis-1 (NF1), a common genetic disease that involving the nervous system. PNs are peripheral nerve sheath tumors extending along the length of the nerve in various parts of the body. Treatment…

Improving accuracy and safety in image-guided keyhole neurosurgery

Abstract Image-guided keyhole neurosurgery consists of targeting a straight surgical tool, such as a needle or a catheter, with a support guidance system towards a target location inside the brain. The target and trajectory are defined on a preoperative MRI/CT…

Trajectory planning method for reduced patient risk in image-guided neurosurgery: concept and preliminary results

Abstract We present a new preoperative planning method to quantify and help reduce the risk associated with needle and tool insertion trajectories in image-guided keyhole neurosurgery. The goal is to quantify the risk of a proposed straight trajectory, and/or to…

A method for planning safe trajectories in image-guided keyhole neurosurgery

Abstract We present a new preoperative planning method for reducing the risk associated with insertion of straight tools in image-guided keyhole neurosurgery. The method quantifies the risks of multiple candidate trajectories and presents them on the outer head surface to…

Surface-based facial scan registration in neuronavigation procedures: a clinical study

Abstract Object. Surface-based registration (SBR) with facial surface scans has been proposed as an alternative for the commonly used fiducial-based registration in image-guided neurosurgery. Recent studies comparing the accuracy of SBR and fiducial-based registration have been based on a few…

Localization and registration accuracy in image guided neurosurgery: a clinical study

Abstract Purpose To measure and compare the clinical localization and registration errors in image-guided neurosurgery, with the purpose of revising current assumptions. Materials and methods Twelve patients who underwent brain surgeries with a navigation system were randomly selected. A neurosurgeon…

Advanced Planning and Intra-operative Validation for Robot-Assisted Keyhole Neurosurgery In ROBOCAST

Abstract ROBOCAST is a multi-national project comprising several institutes which aim at outlining and implementing a prototype system for advanced, robot-assisted keyhole neurosurgery. This paper reports mainly on software and sensor aspects of the system in the pre- and intra-operative…

Optimal landmarks selection and fiducial marker placement for minimal target registration error in image-guided neurosurgery

Abstract We describe a new framework and method for the optimal selection of anatomical landmarks and optimal placement of fiducial markers in image-guided neurosurgery. The method allows the surgeon to optimally plan the markers locations on routine diagnostic images before…

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