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Electromagnetic navigator

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https://www.readbyqxmd.com/read/28088808/shunt-surgery-in-idiopathic-intracranial-hypertension-aided-by-electromagnetic-navigation
#1
Elvis J Hermann, Manolis Polemikos, Hans E Heissler, Joachim K Krauss
BACKGROUND: Idiopathic intracranial hypertension (IIH) is characterized by increased cerebrospinal fluid (CSF) pressure and normal or slit ventricles. Lumboperitoneal shunting had been favored by many investigators for CSF diversion in IIH for decades; however, it has been associated with various side effects. Because of the small ventricular size adequate positioning of a ventricular catheter is challenging. OBJECTIVES: Here, we investigated the usefulness of electromagnetic (EM)-guided ventricular catheter placement for ventriculoperitoneal shunting in IIH...
January 14, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28088226/use-of-an-intraoperative-navigation-system-for-retrieving-a-broken-dental-instrument-in-the-mandible-a-case-report
#2
Shintaro Sukegawa, Takahiro Kanno, Akane Shibata, Kenichi Matsumoto, Yuka Sukegawa-Takahashi, Kyosuke Sakaida, Yoshihiko Furuki
BACKGROUND: A fracture of root canal instruments, with a fractured piece protruding beyond the apex, is a troublesome incident during an endodontic treatment. Locating and retrieving them represents a challenge to maxillofacial surgeons because it is difficult to access due to the proximity between the foreign body and vital structures. Although safe and accurate for surgery, radiographs and electromagnetic devices do not provide a precise three-dimensional position. In contrast, computer-aided navigation provides a correlation between preoperatively collected data and intraoperatively encountered anatomy...
January 15, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28066676/image-guided-localization-of-small-lung-nodules-in-video-assisted-thoracic-surgery
#3
REVIEW
Ze-Rui Zhao, Rainbow W H Lau, Peter S Y Yu, Randolph H L Wong, Calvin S H Ng
The advancement of imaging technology has recently facilitated single port minimally-invasive thoracic surgery techniques. Cone-beam computed tomography (CBCT) shows promising results in visualizing the target lesion and its surrounding critical anatomy, with an error of less than 2 mm. The integration of CBCT with the operating room (OR) to form the hybrid OR, provides unparalleled real-time imaging of the patient, which can be used with electromagnetic navigation bronchoscopy to confirm successful navigation and increase procedural accuracy particularly for small peripheral pulmonary targets...
October 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28049608/electromagnetic-navigated-positioning-of-the-maxilla-after-le-fort-i-osteotomy-in-preclinical-orthognathic-surgery-cases
#4
Moritz Berger, Igor Nova, Sebastian Kallus, Oliver Ristow, Urs Eisenmann, Christian Freudlsperger, Robin Seeberger, Jürgen Hoffmann, Hartmut Dickhaus
OBJECTIVES: Inaccuracies in orthognathic surgery can be caused during face-bow registration, model surgery on plaster models, and intermaxillary splint manufacturing. Electromagnetic (EM) navigation is a promising method for splintless digitized maxillary positioning. STUDY DESIGN: After performing Le Fort I osteotomy on 10 plastic skulls, the target position of the maxilla was guided by an EM navigation system. Specially implemented software illustrated the target position by real-time multistage colored three-dimensional imaging...
October 14, 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28043310/electromagnetic-navigation-in-distal-locking-of-long-diaphyseal-interlocking-intramedullary-nailing
#5
Zhentao Zhou, Xiaozhong Zhou, Bingchen Shan, Haibin Zhou, Zhengfeng Lu, Qirong Dong
OBJECTIVE: To describe the applications and effects of electromagnetic navigation (EN) technology in distal locking for the treatment of long diaphyseal fracture (LDF) with interlocking intramedullary nailing (IIN). STUDY DESIGN: An interventional study. PLACE AND DURATION OF STUDY: The Second Affiliated Hospital of Soochow University, China, from March 2013 to July 2014. METHODOLOGY: Patients who underwent IIN-LDF were selected...
December 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28005832/going-off-road-the-first-case-reports-of-the-use-of-the-transbronchial-access-tool-with-electromagnetic-navigational-bronchoscopy
#6
Carlos Anciano, Craig Brown, Mark Bowling
The ability to reach the peripheral pulmonary nodule/mass with bronchoscopy has improved greatly over the past several years with the use of Electromagnetic navigational bronchoscopy; however, many of these lesions are unable to be adequately sampled due to their location outside the bronchial airways. We report the first use of the transbronchial access tool that creates a pathway from the bronchial airway through the lung parenchyma into the targeted lung abnormality.
December 21, 2016: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/27999309/underwater-electromagnetic-sensor-networks-part-ii-localization-and-network-simulations
#7
Javier Zazo, Sergio Valcarcel Macua, Santiago Zazo, Marina Pérez, Iván Pérez-Álvarez, Eugenio Jiménez, Laura Cardona, Joaquín Hernández Brito, Eduardo Quevedo
In the first part of the paper, we modeled and characterized the underwater radio channel in shallowwaters. In the second part,we analyze the application requirements for an underwaterwireless sensor network (U-WSN) operating in the same environment and perform detailed simulations. We consider two localization applications, namely self-localization and navigation aid, and propose algorithms that work well under the specific constraints associated with U-WSN, namely low connectivity, low data rates and high packet loss probability...
December 17, 2016: Sensors
https://www.readbyqxmd.com/read/27932861/interactive-navigation-guided-ophthalmic-plastic-surgery-assessment-of-optical-versus-electromagnetic-modes-and-role-of-dynamic-reference-frame-location-using-navigation-enabled-human-skulls
#8
Mohammad Javed Ali, Milind N Naik, Chetan Mallikarjuniah Girish, Mohammad Hasnat Ali, Swathi Kaliki, Tarjani Vivek Dave, Gautam Dendukuri
AIM: The aim of this study was to assess the anatomical accuracy of navigation technology in localizing defined anatomic landmarks within the orbit with respect to type of technology (optical versus electromagnetic systems) and position of the dynamic reference marker on the skull (vertex, temporal, parietal, and mastoid) using in vitro navigation-enabled human skulls. The role of this model as a possible learning tool for anatomicoradiological correlations was also assessed. METHODS: Computed tomography (CT) scans were performed on three cadaveric human skulls using the standard image-guidance acquisition protocols...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27925781/same-day-computed-tomographic-chest-imaging-for-pulmonary-nodule-targeting-with-electromagnetic-navigation-bronchoscopy-may-decrease-unnecessary-procedures
#9
Roy W Semaan, Hans J Lee, David Feller-Kopman, Andrew D Lerner, Christopher M Mallow, Jeffrey Thiboutot, Sixto A Arias, Lonny B Yarmus
RATIONALE: Bronchoscopy is commonly used for the diagnosis of suspicious pulmonary nodules discovered on computed tomographic (CT) imaging of the chest. Procedural CT imaging for bronchoscopy planning is often completed weeks to months before the date of a scheduled bronchoscopy, which may not allow discovery of a decrease in nodule size or resolution before the bronchoscopic procedure. OBJECTIVES: To determine whether same-day CT imaging of the chest discovers partial or total resolution of some lung nodules and thereby reduces unnecessary bronchoscopic procedures...
December 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27920491/interactive-navigation-guided-ophthalmic-plastic-surgery-navigation-enabling-of-telescopes-and-their-use-in-endoscopic-lacrimal-surgeries
#10
Mohammad Javed Ali, Swati Singh, Milind N Naik, Swathi Kaliki, Tarjani Vivek Dave
PURPOSE: The aims of this study were to report the preliminary experience of using telescopes, which were enabled for navigation guidance, and their utility in complex endoscopic lacrimal surgeries. METHODS: Navigation enabling of the telescope was achieved by using the AxiEM™ malleable neuronavigation shunt stylet. Image-guided dacryolocalization was performed in five patients using the intraoperative image-guided StealthStation™ system in the electromagnetic mode...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27910956/spin-crossover-materials-towards-microwave-radiation-switches
#11
Olesia I Kucheriv, Viktor V Oliynyk, Volodymyr V Zagorodnii, Vilen L Launets, Il'ya A Gural'skiy
Microwave electromagnetic radiation that ranges from one meter to one millimetre wavelengths is finding numerous applications for wireless communication, navigation and detection, which makes materials able to tune microwave radiation getting widespread interest. Here we offer a new way to tune GHz frequency radiation by using spin-crossover complexes that are known to change their various physical properties under the influence of diverse external stimuli. As a result of electronic re-configuration process, microwave absorption properties differ for high spin and low spin forms of the complex...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27908166/improved-targeting-accuracy-of-lung-tumor-biopsies-with-scanning-beam-digital-x-ray-tomosynthesis-image-guidance
#12
Geoff Nelson, Meng Wu, Cameron Hinkel, Ganesh Krishna, Tobias Funk, Jarrett Rosenberg, Rebecca Fahrig
PURPOSE: Electromagnetic navigation bronchoscopy (ENB) provides improved targeting accuracy during transbronchial biopsies of suspicious nodules. The greatest weakness of ENB-based guidance is the registration divergence that exists between the planning CT, acquired days or weeks before the intervention, and the patient on the table on the day of the intervention. Augmenting ENB guidance with real-time tomosynthesis imaging during the intervention could mitigate the divergence and further improve the yield of ENB-guided transbronchial biopsies...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27844131/-mri-trus-fusion-guided-prostate-biopsy-value-in-the-context-of-focal-therapy
#13
T Franz, J von Hardenberg, A Blana, H Cash, D Baumunk, G Salomon, B Hadaschik, T Henkel, J Herrmann, F Kahmann, K-U Köhrmann, J Köllermann, S Kruck, U-B Liehr, S Machtens, I Peters, J P Radtke, A Roosen, H-P Schlemmer, L Sentker, J J Wendler, U Witzsch, J-U Stolzenburg, M Schostak, R Ganzer
BACKGROUND: Several systems for MRI/TRUS fusion-guided biopsy of the prostate are commercially available. Many studies have shown superiority of fusion systems for tumor detection and diagnostic quality compared to random biopsy. The benefit of fusion systems in focal therapy of prostate cancer (PC) is less clear. OBJECTIVES: Critical considerations of fusion systems for planning and monitoring of focal therapy of PC were investigated. MATERIALS AND METHODS: A systematic literature review of available fusion systems for the period 2013-5/2016 was performed...
November 14, 2016: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/27706039/a-missile-borne-angular-velocity-sensor-based-on-triaxial-electromagnetic-induction-coils
#14
Jian Li, Dan Wu, Yan Han
Aiming to solve the problem of the limited measuring range for angular motion parameters of high-speed rotating projectiles in the field of guidance and control, a self-adaptive measurement method for angular motion parameters based on the electromagnetic induction principle is proposed. First, a framework with type bent "I-shape" is used to design triaxial coils in a mutually orthogonal way. Under the condition of high rotational speed of a projectile, the induction signal of the projectile moving across a geomagnetic field is acquired by using coils...
September 30, 2016: Sensors
https://www.readbyqxmd.com/read/27686414/feasibility-of-electromagnetically-guided-transjugular-intrahepatic-portosystemic-shunt-procedure
#15
Peter Isfort, Tobias Penzkofer, Christoph Wilkmann, Hong-Sik Na, Christian Kotzlowski, Nobutake Ito, Joachim Georg Pfeffer, Stefan Bisplinghoff, Sabine Osterhues, Andreas Besting, Jorge Gooding, Thomas Schmitz-Rode, Christiane Kuhl, Andreas Horst Mahnken, Philipp Bruners
OBJECTIVES: To develop an electromagnetic navigation technology for transjugular intrahepatic portosystemic shunt (TIPS) creation and translate it from phantom to an in-vivo large animal setting. MATERIAL AND METHODS: A custom-designed device for TIPS creation consisting of a stylet within a 5 French catheter as well as a software prototype were developed that allow real-time tip tracking of both stylet and catheter using an electromagnetic tracking system. Feasibility of navigated TIPSS creation was tested in a phantom by two interventional radiologists (A/B) followed by in-vivo testing evaluation in eight domestic pigs...
August 9, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/27651937/recent-clinical-innovations-in-thoracic-surgery-in-hong-kong
#16
REVIEW
Ze-Rui Zhao, Zheng Li, Dong-Rong Situ, Calvin S H Ng
The concept of personalized medicine, which aims to provide patients with targeted therapies while greatly reducing surgical trauma, is gaining popularity among Asian clinicians. Single port video-assisted thoracic surgery (VATS) has rapidly gained popularity in Hong Kong for major lung resections, despite bringing new challenges such as interference between surgical instruments and insertion of the optical source through a single incision. Novel types of endocutters and thoracoscopes can help reduce the difficulties commonly encountered during single-port VATS...
August 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/27623421/diagnostic-yield-of-electromagnetic-navigation-bronchoscopy-using-a-curved-tip-catheter-to-aid-in-the-diagnosis-of-pulmonary-lesions
#17
Sumit Mukherjee, Michael Chacey
BACKGROUND: Electromagnetic navigation bronchoscopy (ENB) may aid in the diagnosis of solitary pulmonary lesions with a lower complication rate than conventional diagnostic modalities. A curved-tip catheter is now available for use with ENB; however, the diagnostic yield of this device has not been previously reported. METHODS: A single-center, single-operator retrospective chart review was performed on patients who underwent ENB for the diagnosis of pulmonary lesions...
January 2017: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/27606080/role-of-electromagnetic-navigational-bronchoscopy-in-pulmonary-nodule-management
#18
REVIEW
Aditya Goud, Chanukya Dahagam, David P Breen, Saiyad Sarkar
The incidence of pulmonary nodules and lung cancer is rising. Some of this increase in incidence is due to improved pick up by newer imaging modalities. However, the goal is to diagnose these lesion, many of which are located in the periphery, by safe and relatively non-invasive methods. This has led to the emergence of numerous techniques such as electromagnetic navigational bronchoscopy (ENB). Current evidence supports a role for these techniques in the diagnostic pathway. However, numerous factor influence the diagnostic accuracy...
July 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/27600892/-potentials-of-intraoperative-navigation-during-balanced-orbital-bony-decompression-in-thyroid-eye-disease-preliminary-results
#19
Ya O Grusha, D S Ismailova, P A Kochetkov, S S Danilov
UNLABELLED: Precise instrument localization is of great importance in orbital decompression surgery. Different navigation systems were designed to fulfill this task and gained wide acceptance. AIM: to describe principal features and determine advantages of intraoperatively navigated orbital bony decompression. MATERIAL AND METHODS: Data on orbital decompression surgery performed with or without intraoperative image guidance is presented. Each time two surgeons were involved - an ophthalmologist (lateral wall decompression) and otolaryngologist (medial wall decompression)...
July 2016: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/27562588/reducing-intraoperative-duration-and-ionising-radiation-exposure-during-the-insertion-of-distal-locking-screws-of-intramedullary-nails-a-small-scale-study-comparing-the-current-fluoroscopic-method-against-radiation-free-electromagnetic-navigation
#20
Darren Grimwood, Jane Harvey-Lloyd
BACKGROUND: Intramedullary nailing is the standard surgical treatment for mid-diaphyseal fractures of long bones; however, it is also a high radiation dose procedure. Distal locking is regularly cited as a demanding element of the procedure, and there remains a reliance on X-ray fluoroscopy to locate the distal holes. A recently developed electromagnetic navigation (EMN) system allows radiation-free distal locking, with a virtual on-screen image. OBJECTIVE: To compare operative duration, fluoroscopy time and radiation dose when using EMN over fluoroscopy, for the distal locking of intramedullary nails...
December 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
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