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https://www.readbyqxmd.com/read/29150795/navigated-3d-ultrasound-versus-conventional-neuronavigation-during-awake-resections-of-eloquent-low-grade-gliomas-a-comparative-study-at-a-single-institution
#1
Andrej Šteňo, Vladimír Hollý, Peter Mendel, Veronika Šteňová, Ľubica Petričková, Gabriela Timárová, Michaela Jezberová, Víťazoslav Belan, Boris Rychlý, Jozef Šurkala, Juraj Šteňo
BACKGROUND: The data showing usefulness of navigated 3D-ultrasound (3DUS) during awake resections of eloquent gliomas are sparse. Results of surgeries performed using 3DUS were never compared to procedures guided by standard neuronavigation. The aim of this work is to assess the effectiveness of 3DUS during awake resections of eloquent low-grade gliomas (LGGs) by comparing surgical results of two series of patients operated on using conventional neuronavigation and using 3DUS. To our knowledge, a similar study is lacking in the literature...
November 17, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29147631/automated-whole-brain-tractography-affects-preoperative-surgical-decision-making
#2
Hesham Zakaria, Sameah Haider, Ian Lee
Surgery in and around eloquent brain structures poses a technical challenge when the goal of surgery is maximal safe resection. Magnetic resonance imaging (MRI) has revolutionized the diagnosis and treatment of neurological disorders, but tractography still remains limited in terms of utility because of the requisite manual labor and time required combined with the high risk of bias and inaccuracy. Automated whole brain tractography (AWBT) has simplified this workflow, overcoming historical barriers, and allowing for integration into modern neuronavigation...
September 6, 2017: Curēus
https://www.readbyqxmd.com/read/29137989/does-tms-on-v3-block-conscious-visual-perception
#3
Niina Salminen-Vaparanta, Mika Koivisto, Victor Vorobyev, Kati Alakurtti, Antti Revonsuo
Primary visual cortex (V1) and extrastriate V2 are necessary for the emergence of visual consciousness, but the effects of involvement of extrastriate V3 on visual consciousness is unclear. The objective of this study was to examine the causal role of V3 in visual consciousness in humans. We combined neuronavigated transcranial magnetic stimulation (TMS) with a computational model of the TMS-induced electric field to test whether or not the intact processing of visual input in V3, like in V1 and V2, is necessary for conscious visual perception...
November 11, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/29137921/intraoperative-definition-of-bottom-of-sulcus-dysplasia-using-intraoperative-ultrasound-and-single-depth-electrode-recording-a-technical-note
#4
Dorothea Miller, Patrick Carney, John S Archer, Gregory J Fitt, Graeme D Jackson, Kristian J Bulluss
Bottom of sulcus dysplasias (BOSDs) are localized focal cortical dysplasias (FCDs) centred on the bottom of a sulcus that can be highly epileptogenic, but difficult to delineate intraoperatively. We report on a patient with refractory epilepsy due to a BOSD, successfully resected with the aid of a multimodal surgical approach using neuronavigation based on MRI and PET, intraoperative ultrasound (iUS) and electrocorticography (ECoG) using depth electrodes. The lesion could be visualized on iUS showing an increase in echogenicity at the grey-white matter junction...
November 11, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29124069/sodium-fluorescein-guided-resection-under-the-yellow-560%C3%A2-nm-surgical-microscope-filter-in-malignant-gliomas-our-first-38-cases-experience
#5
Ningning Zhang, Hailong Tian, Dezhang Huang, Xianbing Meng, Wenqiang Guo, Chaochao Wang, Xin Yin, Hongying Zhang, Bin Jiang, Zheng He, Zhigang Wang
Objective: Sodium fluorescein (FL) had been safely used in fluorescence-guided microsurgery for imaging various brain tumors. Under the YELLOW 560 nm surgical microscope filter, low-dose FL as a fluorescent dye helps in visualization. Our study investigated the safety and efficacy of this innovative technique in malignant glioma (MG) patients. Patients and Method: 38 patients suffering from MGs confirmed by pathology underwent FL-guided resection under YELLOW 560 nm surgical microscope filter...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29121778/intraoperative-image-guided-surgery-in-neuro-oncology-with-specific-focus-on-high-grade-gliomas
#6
Syed O Mahboob, Muftah Eljamel
Surgery is paramount in glioma management and extent of resection is an independent significant prognostic factor. However, these tumors are often invisible intraoperatively. Hence imaging plays an important role in surgical guidance. A critical literature review, using MEDLINE/PubMed service was carried out. It demonstrated a gross total resection (GTR) with neuronavigation (NNS) of 31-36%, adding 5-aminolevulinic acid or fluorescein fluorescence, or intraoperative ultrasound or MRI improved GTR to 69.1, 84...
November 2017: Future Oncology
https://www.readbyqxmd.com/read/29105725/visualization-of-superficial-cerebral-lesions-using-a-smartphone-application
#7
İhsan Doğan, Ümit Eroğlu, Onur Özgüral, Eyyub S Al-Beyati, M Cemil Kilinç, Ayhan Cömert, Melih Bozkurt
AIM: Accurate localizations of cerebral lesions ensure good surgical outcomes and minimize intraoperative complications. Currently, microscope integrated neuronavigation systems compensate these requirements. Since these units are expensive and large, the need to create more practical and portable systems in this "smart" century has become apparent. MATERIAL AND METHODS: See-Through Camera smartphone application is a photography app that penetrates the existing background picture and merges this with camera image on smartphone display...
May 22, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/29094500/the-left-supramarginal-gyrus-contributes-to-finger-positioning-for-object-use-a-neuronavigated-tms-study
#8
Michael Andres, Barbara Pelgrims, Etienne Olivier, Gilles Vannuscorps
In everyday actions, we grasp dozens of different manipulable objects in ways that accommodate their functional use. Neuroimaging studies showed that grasping objects in a way that is appropriate for their use involves a left-lateralized network including the supramarginal gyrus (SMG), the anterior intraparietal area (AIP) and the ventral premotor cortex (PMv). However, because previous works premised their conclusions on tasks requiring action execution, it has remained difficult to discriminate between the areas involved in specifying the position of fingers onto the object from those implementing the motor program required to perform the action...
November 2, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29076463/-application-of-intraoperative-electromagnetic-frameless-navigation-in-transcranial-and-endoscopic-neurosurgical-interventions
#9
V A Shurkhay, S A Goryaynov, M A Kutin, S A Eolchiyan, D N Capitanov, D V Fomichev, P L Kalinin, A N Shkarubo, D N Kopachev, A G Melikyan, M V Nersesyan, A M Shkatova, A N Konovalov, A A Potapov
The paper summarizes the experience in using a system of electromagnetic intraoperative frameless navigation in various neurosurgical pathologies of the brain. The electromagnetic navigation technique was used for 102 operations in 98 patients, including 36 transnasal endoscopic interventions. There were no intraoprtative and postoperative complications associated with the use of the system. In the process of using the system, factors influencing the accuracy of navigation and requiring additional control by the surgeon were identified...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/29058485/accuracy-analysis-of-line-based-registration-for-image-guided-neurosurgery-at-different-operating-areas-a-phantom-study
#10
Dafeng Ji, Yuan Dong, Manning Wang, Zhijian Song
Space registration is the primary function of neuronavigation systems. According to the stage of the operation, the registration could be classified as rigid and non-rigid methods. Scientists have proposed three types of rigid registration methods: point-based registration (PBR), line-based registration (LBR), and surface-based registration (SBR). PBR has been widely used in clinical applications. Recently, LBR was proposed as a new spacing registration method. However, the range and accuracy of LBR are still not defined for clinical applications...
October 23, 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/29026672/intraoperative-navigation-guided-resection-of-anomalous-transverse-processes-in-patients-with-bertolotti-s-syndrome
#11
Harish Babu, Carlito Lagman, Terrence T Kim, Marshall Grode, J Patrick Johnson, Doniel Drazin
BACKGROUND: Bertolotti's syndrome is characterized by enlargement of the transverse process at the most caudal lumbar vertebra with a pseudoarticulation between the transverse process and sacral ala. Here, we describe the use of intraoperative three-dimensional image-guided navigation in the resection of anomalous transverse processes in two patients with Bertolotti's syndrome. CASE DESCRIPTIONS: Two patients diagnosed with Bertolotti's syndrome who had undergone the above-mentioned procedure were identified...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29024165/clinical-yield-of-magnetoencephalography-distributed-source-imaging-in-epilepsy-a-comparison-with-equivalent-current-dipole-method
#12
Giovanni Pellegrino, Tanguy Hedrich, Rasheda Arman Chowdhury, Jeffery A Hall, Francois Dubeau, Jean-Marc Lina, Eliane Kobayashi, Christophe Grova
OBJECTIVE: Source localization of interictal epileptic discharges (IEDs) is clinically useful in the presurgical workup of epilepsy patients. It is usually obtained by equivalent current dipole (ECD) which localizes a point source and is the only inverse solution approved by clinical guidelines. In contrast, magnetic source imaging using distributed methods (dMSI) provides maps of the location and the extent of the generators, but its yield has not been clinically validated. We systematically compared ECD versus dMSI performed using coherent Maximum Entropy on the Mean (cMEM), a method sensitive to the spatial extent of the generators...
October 11, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28994803/an-experimental-protocol-for-assessing-the-performance-of-new-ultrasound-probes-based-on-cmut-technology-in-application-to-brain-imaging
#13
Giulia Matrone, Alessandro Ramalli, Alessandro Stuart Savoia, Fabio Quaglia, Gloria Castellazzi, Patrizia Morbini, Marco Piastra
The possibility to perform an early and repeatable assessment of imaging performance is fundamental in the design and development process of new ultrasound (US) probes. Particularly, a more realistic analysis with application-specific imaging targets can be extremely valuable to assess the expected performance of US probes in their potential clinical field of application. The experimental protocol presented in this work was purposely designed to provide an application-specific assessment procedure for newly-developed US probe prototypes based on Capacitive Micromachined Ultrasonic Transducer (CMUT) technology in relation to brain imaging...
September 24, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28988667/headless-compression-screw-in-the-neuronavigation-guided-and-microscope-assisted-treatment-of-spondylolysis
#14
Francisco Javier Goncalves-Ramírez, Manel Tardaguila Serrano, Sherman H Lee, Carlos Javier Dominguez, Jordi Manuel-Rimbau
Since 1968, many surgical techniques used in repairing the pars defect of the vertebra have been reported. Technological advances are giving rise to new ways of obtaining the best outcome using less invasive methods, which are more accurate, simple and effective. To treat cases of spondylolysis such as pseudarthrosis, we used neuro-navigation and microscopy through a 2.5-cm skin incision to approach the pars defect, freshen the fracture and place a type of screw that, until now, has never been used for this purpose...
October 4, 2017: Neurocirugía
https://www.readbyqxmd.com/read/28987827/surgical-management-of-giant-intracranial-meningioma-operative-nuances-challenges-and-outcome
#15
Vinayak Narayan, Shyamal C Bir, Nasser Mohammed, Amey R Savardekar, Devi Prasad Patra, Anil Nanda
INTRODUCTION: The giant intracranial meningioma [GIM] constitutes a different spectrum of brain tumors which invade the vital neurovascular structures and makes the primary mode of treatment, surgery, a technically challenging one. The surgery of GIM is unique due to its large size, prominent vascularity, entangling and limited visualisation of various neurovascular structures and severe cerebral edema. The study reports the authors surgical experience of 80 GIM cases, the operative challenges and surgical outcome...
October 5, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28985669/establishment-of-next-generation-neurosurgery-research-and-training-laboratory-with-integrated-human-performance-monitoring
#16
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/28973523/endoscopic-approach-of-the-insula-through-the-anterior-middle-temporal-gyrus-a-feasibility-study-in-the-laboratory
#17
Francesco Corrivetti, Sébastien Froelich, Emmanuel Mandonnet
BACKGROUND: Insular glioma surgery still represents a challenge. Nonetheless, advances in microsurgical anatomy and brain mapping techniques have allowed an increase in the extent of resection with acceptable morbidity rates. Transsylvian and transcortical approaches constitute the main surgical corridors, the latter providing considerable advantages and a high degree of reliability. Nevertheless, both surgical corridors yield remarkable difficulties in reaching the most posterior insular region...
July 25, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28961936/the-surgical-white-matter-chassis-a-practical-3-dimensional-atlas-for-planning-subcortical-surgical-trajectories
#18
Jonathan E Jennings, Amin B Kassam, Melanie B Fukui, Alejandro Monroy-Sosa, Srikant Chakravarthi, Nathan Kojis, Richard A Rovin
BACKGROUND: The imperative role of white matter preservation in improving surgical functional outcomes is now recognized. Understanding the fundamental white matter framework is essential for translating the anatomic and functional literature into practical strategies for surgical planning and neuronavigation. OBJECTIVE: To present a 3-dimensional (3-D) atlas of the structural and functional scaffolding of human white matter-ie, a "Surgical White Matter Chassis (SWMC)"-that can be used as an organizational tool in designing precise and individualized trajectory-based neurosurgical corridors...
August 5, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28959876/ultrasound-assisted-awake-epilepsy-surgery-for-type-iib-focal-cortical-dysplasia-in-eloquent-areas
#19
Matteo Martinoni, Gianluca Marucci, Stefano Meletti, Lilia Volpi, Roberto Michelucci, Marco Giulioni
INTRODUCTION: Focal cortical dysplasia (FCD) type IIb is a frequent cause of pharmacoresistant epilepsy. However, intraoperative identification of the pathological tissue still remains a challenge despite the use of neuronavigation, particularly when it lies in eloquent areas. CASE REPORT: We here report a case of intraoperative identification of a right frontal FCD type IIB through ultrasound assisted neuronavigation during awake surgery in a patient with drug-resistant epilepsy...
September 28, 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28951272/intraoperative-mr-imaging-and-neuronavigation-during-resection-of-fcd-type-ii-in-adult-epilepsy-surgery-offers-better-seizure-outcome
#20
Karl Roessler, Burkhard S Kasper, Elisabeth Heynold, Roland Coras, Björn Sommer, Stefan Rampp, Hajo M Hamer, Ingmar Blümcke, Michael Buchfelder
OBJECTIVE: Focal cortical dysplasia (FCD) is one important cause of drug-resistant epilepsy potentially curable by epilepsy surgery. We investigated the options utilizing neuronavigation and intraoperative MR imaging to avoid residual epileptogenic tissue during resection of FCD II patients in order to improve seizure outcome. METHODS: Altogether 24 FCD II patients diagnosed by MR imaging (16 female, 8 males, mean age 34 ± 10 years) suffered from drug-resistant electro-clinical and focal epilepsy for mean 20...
September 23, 2017: World Neurosurgery
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