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https://www.readbyqxmd.com/read/29029228/development-of-a-whole-task-simulator-for-carotid-endarterectomy
#1
Gabrielle Santangelo, Doran Mix, Ahmed Ghazi, Michael Stoner, G Edward Vates, Jonathan J Stone
BACKGROUND: Surgical education relies on operative exposure with live patients. Carotid endarterectomy (CEA) demands an experienced surgeon with a very low complication rate. The high-risk nature of this procedure and the decline in number of CEAs performed annually has created a gap in residency training. OBJECTIVE: To develop a high-fidelity whole-task simulation for CEA that demonstrates content, construct, and face validity. METHODS: Anatomically accurate models of the human neck were created using multilayered poly-vinyl alcohol hydrogels...
September 27, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28985669/establishment-of-next-generation-neurosurgery-research-and-training-laboratory-with-integrated-human-performance-monitoring
#2
Antonio Bernardo
Quality of neurosurgical care and patient outcomes are inextricably linked to surgical and technical proficiency and a thorough working knowledge of microsurgical anatomy. Neurosurgical laboratory-based cadaveric training is essential for the development and refinement of technical skills before their use on a living patient. Recent biotechnological advances including 3-dimensional (3D) microscopy and endoscopy, 3D printing, virtual reality, surgical simulation, surgical robotics, and advanced neuroimaging have proved to reduce the learning curve, improve conceptual understanding of complex anatomy, and enhance visuospatial skills in neurosurgical training...
October 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28942677/a-novel-device-for-intraoperative-photodynamic-therapy-dedicated-to-glioblastoma-treatment
#3
Clément Dupont, Serge Mordon, Pascal Deleporte, Nicolas Reyns, Maximilien Vermandel
AIM: Photodynamic therapy (PDT) appears to be a valuable new treatment modality for cancer therapy. Studies have reported successful application of PDT for glioblastoma. Here, we introduce a new device dedicated to intraoperative PDT delivered early after fluoro-guided resection combined with a transfer function that determines the treatment time based on the size of the surgical resection cavity. MATERIALS & METHODS: First, we describe the device, which is composed of a trocar, a balloon filled with a diffusing solution, and a fiber guide in which a cylindrical light diffuser is inserted...
September 25, 2017: Future Oncology
https://www.readbyqxmd.com/read/28924572/stereovision-based-integrated-system-for-point-cloud-reconstruction-and-simulated-brain-shift-validation
#4
Xiaochen Yang, Logan W Clements, Ma Luo, Saramati Narasimhan, Reid C Thompson, Benoit M Dawant, Michael I Miga
Intraoperative soft tissue deformation, referred to as brain shift, compromises the application of current image-guided surgery navigation systems in neurosurgery. A computational model driven by sparse data has been proposed as a cost-effective method to compensate for cortical surface and volumetric displacements. We present a mock environment developed to acquire stereoimages from a tracked operating microscope and to reconstruct three-dimensional point clouds from these images. A reconstruction error of 1 mm is estimated by using a phantom with a known geometry and independently measured deformation extent...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28864400/effects-of-transcranial-direct-current-stimulation-on-neurosurgical-skill-acquisition-a-randomized-controlled-trial
#5
Patrick Ciechanski, Adam Cheng, Steven Lopushinsky, Kent Hecker, Liu Shi Gan, Stefan Lang, Kourosh Zareinia, Adam Kirton
BACKGROUND: Recent changes in surgical training environments may have limited opportunities for trainees to gain proficiency in skill. Complex skills such as neurosurgery required extended periods of training. Methods to enhance surgical training are required to overcome duty-hour restrictions, to ensure skill proficiency is met. Transcranial direct-current stimulation (tDCS) can enhance motor skill learning but is untested in surgical procedural training. We aimed to determine the effects of tDCS on simulation-based neurosurgical skill acquisition...
August 29, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28842674/hyperspectral-data-processing-improves-ppix-contrast-during-fluorescence-guided-surgery-of-human-brain-tumors
#6
J J Bravo, J D Olson, S C Davis, D W Roberts, K D Paulsen, S C Kanick
Fluorescence guided surgery (FGS) using aminolevulinic-acid (ALA) induced protoporphyrin IX (PpIX) provides intraoperative visual contrast between normal and malignant tissue during resection of high grade gliomas. However, maps of the PpIX biodistribution within the surgical field based on either visual perception or the raw fluorescence emissions can be masked by background signals or distorted by variations in tissue optical properties. This study evaluates the impact of algorithmic processing of hyperspectral imaging acquisitions on the sensitivity and contrast of PpIX maps...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811078/mentoring-models-in-neurosurgical-training-review-of-literature
#7
REVIEW
Taiwo Akhigbe, Ardalan Zolnourian, Diederik Bulters
BACKGROUND: Effective mentoring is an invaluable element in the development of next generation of neurosurgeons. A mentor helps to develop professional core values, technical and non-technical skills, attitudes and disposition required to be qualified and competent neurosurgeon. Giving the invaluable significance of mentoring in neurosurgery, we undertook this literature review to identify mentoring models evaluating its success and relative benefit. METHODS: Literature search identified using MeSH word 'mentor', mentoring, mentorship, mentoring model, neurosurgery' in MEDLINE, EMBASE and Scopus databases from 1990 to 2016...
November 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28774433/a-high-resolution-model-for-soft-tissue-deformation-based-on-point-primitives
#8
Yanni Zou, Peter X Liu
BACKGROUND AND OBJECTIVES: In order to achieve a high degree of visual realism in surgery simulation, we propose a new model, which is based on point primitives and continuous elastic mechanics theory, for soft tissue deformation, tearing and/or cutting. METHODS: The model can be described as a two-step local high-resolution strategy. First, appropriate volumetric data are sampled and assigned with proper physical properties. Second, sparsely sampled points in non-deformed regions and densely-sampled points in the deformed zone are selected and evaluated...
September 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28765716/simulation-training-in-neurosurgery-advances-in-education-and-practice
#9
REVIEW
Sanjay Konakondla, Reginald Fong, Clemens M Schirmer
The current simulation technology used for neurosurgical training leaves much to be desired. Significant efforts are thoroughly exhausted in hopes of developing simulations that translate to give learners the "real-life" feel. Though a respectable goal, this may not be necessary as the application for simulation in neurosurgical training may be most useful in early learners. The ultimate uniformly agreeable endpoint of improved outcome and patient safety drives these investments. We explore the development, availability, educational taskforces, cost burdens and the simulation advancements in neurosurgical training...
2017: Advances in Medical Education and Practice
https://www.readbyqxmd.com/read/28756040/viscoelastic-parameter-identification-of-human-brain-tissue
#10
S Budday, G Sommer, G A Holzapfel, P Steinmann, E Kuhl
Understanding the constitutive behavior of the human brain is critical to interpret the physical environment during neurodevelopment, neurosurgery, and neurodegeneration. A wide variety of constitutive models has been proposed to characterize the brain at different temporal and spatial scales. Yet, their model parameters are typically calibrated with a single loading mode and fail to predict the behavior under arbitrary loading conditions. Here we used a finite viscoelastic Ogden model with six material parameters-an elastic stiffness, two viscoelastic stiffnesses, a nonlinearity parameter, and two viscous time constants-to model the characteristic nonlinearity, conditioning, hysteresis and tension-compression asymmetry of the human brain...
October 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28754068/a-new-head-mounted-display-based-augmented-reality-system-in-neurosurgical-oncology-a-study-on-phantom
#11
Fabrizio Cutolo, Antonio Meola, Marina Carbone, Sara Sinceri, Federico Cagnazzo, Ennio Denaro, Nicola Esposito, Mauro Ferrari, Vincenzo Ferrari
PURPOSE: Benefits of minimally invasive neurosurgery mandate the development of ergonomic paradigms for neuronavigation. Augmented Reality (AR) systems can overcome the shortcomings of commercial neuronavigators. The aim of this work is to apply a novel AR system, based on a head-mounted stereoscopic video see-through display, as an aid in complex neurological lesion targeting. Effectiveness was investigated on a newly designed patient-specific head mannequin featuring an anatomically realistic brain phantom with embedded synthetically created tumors and eloquent areas...
December 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/28750949/a-machine-learning-approach-for-real-time-modelling-of-tissue-deformation-in-image-guided-neurosurgery
#12
Michele Tonutti, Gauthier Gras, Guang-Zhong Yang
OBJECTIVES: Accurate reconstruction and visualisation of soft tissue deformation in real time is crucial in image-guided surgery, particularly in augmented reality (AR) applications. Current deformation models are characterised by a trade-off between accuracy and computational speed. We propose an approach to derive a patient-specific deformation model for brain pathologies by combining the results of pre-computed finite element method (FEM) simulations with machine learning algorithms...
July 2017: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/28721533/minimum-norm-estimation-of-motor-representations-in-navigated-tms-mappings
#13
Minna Pitkänen, Elisa Kallioniemi, Petro Julkunen, Maria Nazarova, Jaakko O Nieminen, Risto J Ilmoniemi
Navigated transcranial magnetic stimulation (nTMS) can be applied to locate and outline cortical motor representations. This may be important, e.g., when planning neurosurgery or focused nTMS therapy, or when assessing plastic changes during neurorehabilitation. Conventionally, a cortical location is considered to belong to the motor cortex if the maximum electric field (E-field) targeted there evokes a motor-evoked potential in a muscle. However, the cortex is affected by a broad E-field distribution, which tends to broaden estimates of representation areas by stimulating also the neighboring areas in addition to the maximum E-field location...
July 18, 2017: Brain Topography
https://www.readbyqxmd.com/read/28666846/-3d-printing-in-neurosurgery-a-specific-model-for-patients-with-craniosynostosis
#14
Borja Jiménez Ormabera, Ricardo Díez Valle, Javier Zaratiegui Fernández, Marcos Llorente Ortega, Xabier Unamuno Iñurritegui, Sonia Tejada Solís
INTRODUCTION: Craniosynostosis is a rare condition and requires a personalised surgical approach, which is why we consider the use of 3D printed models beneficial in the surgical planning of this procedure. MATERIAL AND METHODS: Acrylonitrile butadiene styrene plastic skull models were designed and printed from CT images of patients between 3 and 6 months of age with craniosynostosis of different sutures. The models were used to simulate surgical procedures. RESULTS: Four models of four patients with craniosynostosis were produced: two with closure of the metopic suture and two with sagittal suture closure...
June 27, 2017: Neurocirugía
https://www.readbyqxmd.com/read/28651099/brain-shift-compensation-using-intraoperative-ultrasound-and-constraint-based-biomechanical-simulation
#15
Fanny Morin, Hadrien Courtecuisse, Ingerid Reinertsen, Florian Le Lann, Olivier Palombi, Yohan Payan, Matthieu Chabanas
PURPOSE: During brain tumor surgery, planning and guidance are based on preoperative images which do not account for brain-shift. However, this deformation is a major source of error in image-guided neurosurgery and affects the accuracy of the procedure. In this paper, we present a constraint-based biomechanical simulation method to compensate for craniotomy-induced brain-shift that integrates the deformations of the blood vessels and cortical surface, using a single intraoperative ultrasound acquisition...
June 15, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28637947/neurosurgical-virtual-reality-simulation-for-brain-tumor-using-high-definition-computer-graphics-a-review-of-the-literature
#16
Taichi Kin, Hirofumi Nakatomi, Naoyuki Shono, Seiji Nomura, Toki Saito, Hiroshi Oyama, Nobuhito Saito
Simulation and planning of surgery using a virtual reality model is becoming common with advances in computer technology. In this study, we conducted a literature search to find trends in virtual simulation of surgery for brain tumors. A MEDLINE search for "neurosurgery AND (simulation OR virtual reality)" retrieved a total of 1,298 articles published in the past 10 years. After eliminating studies designed solely for education and training purposes, 28 articles about the clinical application remained. The finding that the vast majority of the articles were about education and training rather than clinical applications suggests that several issues need be addressed for clinical application of surgical simulation...
October 15, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28600218/systematic-review-of-patient-specific-surgical-simulation-toward-advancing-medical-education-%C3%A2
#17
Won Hyung A Ryu, Navjit Dharampal, Ahmed E Mostafa, Ehud Sharlin, Gail Kopp, William Bradley Jacobs, Robin John Hurlbert, Sonny Chan, Garnette R Sutherland
OBJECTIVE: Simulation-based education has been shown to be an effective tool to teach foundational technical skills in various surgical specialties. However, most of the current simulations are limited to generic scenarios and do not allow continuation of the learning curve beyond basic technical skills to prepare for more advanced expertise, such as patient-specific surgical planning. The objective of this study was to evaluate the current medical literature with respect to the utilization and educational value of patient-specific simulations for surgical training...
June 6, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28599904/youtube-as-a-source-of-information-on-neurosurgery
#18
Nardin Samuel, Naif M Alotaibi, Andres M Lozano
BACKGROUND: The importance of videos in social media communications in the context of health care and neurosurgery is becoming increasingly recognized. However, there has not yet been a systematic analysis of these neurosurgery-related communications. Accordingly, this study was aimed at characterizing the online video content pertaining to neurosurgery. METHODS: Neurosurgery-related videos uploaded on YouTube were collected using a comprehensive search strategy...
September 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28573545/a-software-framework-for-real-time-multi-modal-detection-of-microsleeps
#19
Simon J Knopp, Philip J Bones, Stephen J Weddell, Richard D Jones
A software framework is described which was designed to process EEG, video of one eye, and head movement in real time, towards achieving early detection of microsleeps for prevention of fatal accidents, particularly in transport sectors. The framework is based around a pipeline structure with user-replaceable signal processing modules. This structure can encapsulate a wide variety of feature extraction and classification techniques and can be applied to detecting a variety of aspects of cognitive state. Users of the framework can implement signal processing plugins in C++ or Python...
June 1, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28524798/revisiting-the-rules-for-freehand-ventriculostomy-a-virtual-reality-analysis
#20
Clemens Raabe, Jens Fichtner, Jürgen Beck, Jan Gralla, Andreas Raabe
OBJECTIVE Frontal ventriculostomy is one of the most frequent and standardized procedures in neurosurgery. However, many first and subsequent punctures miss the target, and suboptimal placement or misplacement of the catheter is common. The authors therefore reexamined the landmarks and rules to determine the entry point and trajectory with the best hit rate (HtR). METHODS The authors randomly selected CT scans from their institution's DICOM pool that had been obtained in 50 patients with normal ventricular and skull anatomy and without ventricular puncture...
May 19, 2017: Journal of Neurosurgery
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