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Electromagnetic navigator

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https://www.readbyqxmd.com/read/28807088/posterior-translacrimal-approach-to-the-maxillary-sinus
#1
D Dönmez, E Giotakis, W G Hosemann, T S Kühnel, B Hirt, R K Weber
BACKGROUND: This study aimed to compare the view into the maxillary sinus using the posterior translacrimal approach compared with grade 3 antrostomy. METHODS: Grade 3 antrostomy followed by a posterior translacrimal approach was performed on four cadavers. The maximum intramaxillary view was documented endoscopically guided by electromagnetic navigation. Representative screenshots were evaluated in a blinded manner by three independent sinus surgeons. In addition, a prospective investigation of specific complications in the post-operative course of consecutive patients was performed...
August 15, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28803481/autonomous-collision-free-navigation-of-microvehicles-in-complex-and-dynamically-changing-environments
#2
Tianlong Li, Xiaocong Chang, Zhiguang Wu, Jinxing Li, Guangbin Shao, Xinghong Deng, Jianbin Qiu, Bin Guo, Guangyu Zhang, Qiang He, Longqiu Li, Joseph Wang
Self-propelled micro- and nanoscale robots represent a rapidly emerging and fascinating robotics research area. However, designing autonomous and adaptive control systems for operating micro-/nanorobotics in complex and dynamically-changing environments, which is a highly demanding feature, is still an unmet challenge. Here we describe a smart microvehicle for precise autonomous navigation in complicated environments and traffic scenarios. The fully autonomous navigation system of the smart microvehicle is composed of a microscope-coupled CCD camera, an artificial intelligence planner, and a magnetic field generator...
August 12, 2017: ACS Nano
https://www.readbyqxmd.com/read/28777130/electromagnetic-navigational-bronchoscopy-reduces-the-time-required-for-localization-and-resection-of-lung-nodules
#3
William David Bolton, Thomas Cochran, Sharon Ben-Or, James E Stephenson, William Ellis, Allyson L Hale, Andrew P Binks
OBJECTIVE: The aims of the study were to evaluate electromagnetic navigational bronchoscopy (ENB) and computed tomography-guided placement as localization techniques for minimally invasive resection of small pulmonary nodules and determine whether electromagnetic navigational bronchoscopy is a safer and more effective method than computed tomography-guided localization. METHODS: We performed a retrospective review of our thoracic surgery database to identify patients who underwent minimally invasive resection for a pulmonary mass and used either electromagnetic navigational bronchoscopy or computed tomography-guided localization techniques between July 2011 and May 2015...
August 2, 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28770838/observation-of-the-hyperfine-spectrum-of-antihydrogen
#4
M Ahmadi, B X R Alves, C J Baker, W Bertsche, E Butler, A Capra, C Carruth, C L Cesar, M Charlton, S Cohen, R Collister, S Eriksson, A Evans, N Evetts, J Fajans, T Friesen, M C Fujiwara, D R Gill, A Gutierrez, J S Hangst, W N Hardy, M E Hayden, C A Isaac, A Ishida, M A Johnson, S A Jones, S Jonsell, L Kurchaninov, N Madsen, M Mathers, D Maxwell, J T K McKenna, S Menary, J M Michan, T Momose, J J Munich, P Nolan, K Olchanski, A Olin, P Pusa, C Ø Rasmussen, F Robicheaux, R L Sacramento, M Sameed, E Sarid, D M Silveira, S Stracka, G Stutter, C So, T D Tharp, J E Thompson, R I Thompson, D P van der Werf, J S Wurtele
The observation of hyperfine structure in atomic hydrogen by Rabi and co-workers and the measurement of the zero-field ground-state splitting at the level of seven parts in 10(13) are important achievements of mid-twentieth-century physics. The work that led to these achievements also provided the first evidence for the anomalous magnetic moment of the electron, inspired Schwinger's relativistic theory of quantum electrodynamics and gave rise to the hydrogen maser, which is a critical component of modern navigation, geo-positioning and very-long-baseline interferometry systems...
August 2, 2017: Nature
https://www.readbyqxmd.com/read/28758547/design-of-a-sensorized-guiding-catheter-for-in-situ-laser-fenestration-of-endovascular-stent
#5
Roberta Piazza, Sara Condino, Aldo Alberti, Raffaella Nice Berchiolli, Gioachino Coppi, Marco Gesi, Vincenzo Ferrari, Mauro Ferrari
PURPOSE: The in situ fenestration of a standard endograft is currently limited by difficulties in targeting the fenestration site under fluoroscopic control and by the lack of a safe method to perforate the graft. Evidence in the literature suggests the use of a 3 D electromagnetic navigator to accurately guide the endovascular instruments to the target and a laser to selectively perforate the graft. The aim of this work is to provide design guidelines to develop a sensorized catheter to guide the laser tool to the fenestration site and conduct preliminary testing of the feasibility of the proposed solution...
December 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/28754159/the-role-of-electrical-stimulation-in-the-management-of-avascular-necrosis-of-the-femoral-head-in-adults-a-systematic-review
#6
Talal Al-Jabri, Jessica Yan Qi Tan, Gabriel Yihan Tong, Ravikiran Shenoy, Babar Kayani, Timothy Parratt, Tahir Khan
BACKGROUND: Avascular necrosis of the femoral head causes significant morbidity and occurs in up to 20,000 people per year. A variety of nonoperative and operative measures have been trialled however a definitive treatment algorithm is yet to be established. Young adults in many cases have undergone multiple surgical procedures in their lifetime with increasing risks of complications. Less invasive techniques may help reduce the number of operations required and positively influence the natural history of the disease process...
July 28, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28734401/sampling-of-suspicious-solitary-pulmonary-nodules-electromagnetic-navigational-bronchoscopy-and-video-assisted-thoracoscopic-surgery
#7
Maria Lucia L Madariaga, Michael Lanuti
No abstract text is available yet for this article.
July 2017: Seminars in Roentgenology
https://www.readbyqxmd.com/read/28728712/diagnostic-imaging-and-newer-modalities-for-thoracic-diseases-pet-computed-tomographic-imaging-and-endobronchial-ultrasound-for-staging-and-its-implication-for-lung-cancer
#8
REVIEW
Sarah J Counts, Anthony W Kim
Modalities to detect and characterize lung cancer are generally divided into those that are invasive [endobronchial ultrasound (EBUS), esophageal ultrasound (EUS), and electromagnetic navigational bronchoscopy (ENMB)] versus noninvasive [chest radiography (CXR), computed tomography (CT), positron emission tomography (PET), and magnetic resonance imaging (MRI)]. This chapter describes these modalities, the literature supporting their use, and delineates what tests to use to best evaluate the patient with lung cancer...
August 2017: Surgical Clinics of North America
https://www.readbyqxmd.com/read/28723755/comparison-of-free-hand-fluoroscopic-guidance-and-electromagnetic-navigation-in-distal-locking-of-femoral-intramedullary-nails
#9
COMPARATIVE STUDY
Bing Han, Zhigang Shi, Yu Fu, Yong Ye, Juehua Jing, Jun Li
BACKGROUND: Although the method has been used widely, one of the greatest challenges for intramedullary nailing is to position the distal locking screw. A new technology, the electromagnetic navigation system, is a radiation-free way to locate the position of the drill bit and provide 3-dimensional real-time feedback of location and orientation of the drill bit relative to the locking holes. The purpose of our study was to evaluate the reliability and efficiency of the free-hand technique compared to the new electromagnetic navigation system...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28689346/electromagnetic-navigation-guided-neuroendoscopic-removal-of-radiation-induced-intraforniceal-cavernoma-as-a-late-complication-of-medulloblastoma-treatment
#10
Petr Liby, J Zamecnik, M Kyncl, J Zackova, M Tichy
INTRODUCTION: Medulloblastoma is the most frequent malignant brain tumour in children. Radiation-induced cavernous haemangiomas (RICHs) are a known late complication of radiation exposure, especially in young children. CASE REPORT: We present a patient who underwent subtotal resection of posterior fossa medulloblastoma with subsequent chemotherapy and radiotherapy at the age of 10 years. A new lesion in the region of the left foramen of Monro appeared 16 years later...
July 8, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28683837/evaluation-of-the-clinical-benefit-of-an-electromagnetic-navigation-system-for-ct-guided-interventional-radiology-procedures-in-the-thoraco-abdominal-region-compared-with-conventional-ct-guidance-ctnav-ii-study-protocol-for-a-randomised-controlled-trial
#11
R C Rouchy, A Moreau-Gaudry, E Chipon, S Aubry, L Pazart, B Lapuyade, M Durand, M Hajjam, S Pottier, B Renard, R Logier, X Orry, A Cherifi, E Quehen, G Kervio, O Favelle, F Patat, E De Kerviler, C Hughes, M Medici, J Ghelfi, A Mounier, I Bricault
BACKGROUND: Interventional radiology includes a range of minimally invasive image-guided diagnostic and therapeutic procedures that have become routine clinical practice. Each procedure involves a percutaneous needle insertion, often guided using computed tomography (CT) because of its availability and usability. However, procedures remain complicated, in particular when an obstacle must be avoided, meaning that an oblique trajectory is required. Navigation systems track the operator's instruments, meaning the position and progression of the instruments are visualised in real time on the patient's images...
July 6, 2017: Trials
https://www.readbyqxmd.com/read/28629919/comparing-pulmonary-nodule-location-during-electromagnetic-bronchoscopy-with-predicted-location-on-the-basis-of-two-virtual-airway-maps-at-different-phases-of%C3%A2-respiration
#12
Brian S Furukawa, Nicholas J Pastis, Nichole T Tanner, Alexander Chen, Gerard A Silvestri
BACKGROUND: Electromagnetic navigational bronchoscopy (ENB) is guided bronchoscopy to pulmonary nodules (PN) that relies on a preprocedural chest CT to create a three-dimensional (3D) virtual airway map. The CT is traditionally done at a full inspiratory breath hold (INSP), but the procedure is performed while the patient tidal breaths, when lung volumes are closer to functional residual capacity. Movement of a PN from INSP to expiration (EXP) has been shown to average 17.6 mm. Therefore, the hypothesis of this study is that preprocedural virtual maps built off a CT closer to physiological lung volumes during bronchoscopy may better represent the actual 3D location of a PN...
June 16, 2017: Chest
https://www.readbyqxmd.com/read/28584321/occupational-exposure-to-electromagnetic-fields-in-the-polish-armed-forces
#13
Jaromir Sobiech, Jarosław Kieliszek, Robert Puta, Dagmara Bartczak, Wanda Stankiewicz
OBJECTIVES: Standard devices used by military personnel that may pose electromagnetic hazard include: radars, missile systems, radio navigation systems and radio transceivers. The aim of this study has been to evaluate the exposure of military personnel to electromagnetic fields. MATERIAL AND METHODS: Occupational exposure to electromagnetic fields was analyzed in the work environment of personnel of 204 devices divided into 5 groups (surface-to-air missile system radars, aircraft and helicopters, communication devices, surveillance and height finder radars, airport radars and radio navigation systems)...
April 28, 2017: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/28583735/electromagnetic-tracking-of-flexible-robotic-catheters-enables-assisted-navigation-and-brings-automation-to-endovascular-navigation-in-an-in-vitro-study
#14
Adeline Schwein, Benjamin Kramer, Ponraj Chinnadurai, Neha Virmani, Sean Walker, Marcia O'Malley, Alan B Lumsden, Jean Bismuth
OBJECTIVE: Combining three-dimensional (3D) catheter control with electromagnetic (EM) tracking-based navigation significantly reduced fluoroscopy time and improved robotic catheter movement quality in a previous in vitro pilot study. The aim of this study was to expound on previous results and to expand the value of EM tracking with a novel feature, assistednavigation, allowing automatic catheter orientation and semiautomatic vessel cannulation. METHODS: Eighteen users navigated a robotic catheter in an aortic aneurysm phantom using an EM guidewire and a modified 9F robotic catheter with EM sensors at the tip of both leader and sheath...
June 2, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28576204/interactive-navigation-guided-ophthalmic-plastic-surgery-the-techniques-and-utility-of-3-dimensional-navigation
#15
Mohammad Javed Ali, Milind N Naik, Swathi Kaliki, Tarjani Vivek Dave, Gautam Dendukuri
OBJECTIVE: To demonstrate the techniques and utility of 3-dimensional reconstruction (3DR) of the target pathologies for subsequent navigation guidance in ophthalmic plastic surgery. DESIGN: Prospective interventional case series. METHODS: Stereotactic surgeries using 3D reconstruction of target lesions as the intraoperative image-guiding tool were performed in 5 patients with varied etiopathologies. All the surgeries were performed using the intraoperative image-guided StealthStation system in the electromagnetic mode...
June 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28555269/placement-accuracy-of-external-ventricular-drain-when-comparing-freehand-insertion-to-neuronavigation-guidance-in-severe-traumatic-brain-injury
#16
Ahmed AlAzri, Kelvin Mok, Jeffrey Chankowsky, Mohammad Mullah, Judith Marcoux
BACKGROUND: External ventricular drain (EVD) placement is a frequently performed neurosurgical procedure. Inaccuracies in drain positioning and the need for multiple passes using the classic freehand insertion technique is well reported in the literature, especially in the traumatic brain injury (TBI) population. The purpose of this study was to evaluate if electromagnetic neuronavigation guidance for EVD insertion improves placement accuracy and minimizes the number of passes in severe TBI patients...
August 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28543091/intraoperative-localized-constrained-registration-in-navigated-bronchoscopy
#17
Erlend Fagertun Hofstad, Hanne Sorger, Janne Beate Lervik Bakeng, Lucian Gruionu, Håkon Olav Leira, Tore Amundsen, Thomas Langø
PURPOSE: One of the major challenges in electromagnetic navigated bronchoscopy is the navigation accuracy. An initial rigid image-to-patient registration may not be optimal for the entire lung volume, as the lung tissue anatomy is likely to have shifted since the time of computer tomography (CT) acquisition. The accuracy of the initial rigid registration will also be affected throughout the procedure by breathing, coughing, patient movement and tissue displacements due to pressure from bronchoscopy tools...
August 2017: Medical Physics
https://www.readbyqxmd.com/read/28527967/feasibility-and-safety-of-the-transbronchial-access-tool-for-peripheral-pulmonary-nodule-and-mass
#18
Mark R Bowling, Craig Brown, Carlos J Anciano
BACKGROUND: Navigational bronchoscopy and other imaging modalities have improved the ability to evaluate pulmonary nodules/mass. Many of these lesions are located outside the bronchial airway and are difficult to access even with these devices. The Transbronchial Access Tool (Medtronic, Minneapolis, MN) allows the bronchoscopist to create a pathway from the bronchial airway, across the lung parenchyma, and into the target lesion. We are reporting the feasibility and safety of this new device...
August 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28521036/a-novel-approach-of-navigation-assisted-flexible-neuroendoscopy
#19
Jaime G Torres-Corzo, Leonardo Rangel-Castilla, Mario Alberto Islas-Aguilar, Roberto Rodríguez-Della Vecchia
BACKGROUND AND IMPORTANCE: Neuronavigation-assisted endoscopy is commonly used for skull base and intraventricular surgery. Flexible neuroendoscopy offers certain advantages over rigid endoscopy; however, a major disadvantage of the flexible endoscope has been easy disorientation in the flexed position. Neuronavigation-assisted flexible neuroendoscopy was not available until now. This is the first report of the use of navigation-assisted flexible neuroendoscopy in a patient with hydrocephalus...
May 18, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28500927/comparison-of-electromagnetic-neuronavigation-system-and-free-hand-method-for-ventricular-catheter-placement-in-internal-shunt
#20
Vianney Gilard, Nicolas Magne, Emmanuel Gerardin, Sophie Curey, Valérie Pelletier, Pierre Hannequin, Stéphane Derrey
OBJECTIVE: Optimal ventricular catheter positioning is able to reduce the risk of catheter dysfunction, and subsequently the risk of multiple revision surgery. The objective of our study was to compare the proportion of optimal ventricular catheter placements in a cohort of patients operated for ventriculoperitoneal (VP) shunt between a free-hand group and a neuronavigated group. PATIENTS AND METHODS: Twenty patients with hydrocephalus requiring VP shunt were prospectively included in this study...
July 2017: Clinical Neurology and Neurosurgery
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