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Electromagnetic Navigation

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https://www.readbyqxmd.com/read/28332159/electromagnetically-tracked-personalized-templates-for-surgical-navigation
#1
Andrew W L Dickinson, Michelle L Zec, David R Pichora, Brian J Rasquinha, Randy E Ellis
PURPOSE: An electromagnetic (EM) surgical tracking system was developed for orthopedic navigation. The reportedly poor accuracy of point-based EM navigation was improved by using anatomical impressions, which were EM-tracked personalized templates. Lines, rather than points, were consistently used for calibration and error evaluation. METHODS: Technical accuracy was tested using models derived from CT scans of ten cadaver shoulders. Tracked impressions were first designed, calibrated, and tested using lines as fiducial objects...
March 22, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28332158/first-clinical-use-of-the-echotrack-guidance-approach-for-radiofrequency-ablation-of-thyroid-gland-nodules
#2
Alfred Michael Franz, Alexander Seitel, Nasrin Bopp, Christian Erbelding, Dominique Cheray, Stefan Delorme, Frank Grünwald, Hüdayi Korkusuz, Lena Maier-Hein
PURPOSE: Percutaneous radiofrequency ablation (RFA) of thyroid nodules is an alternative to surgical resection that offers the benefits of minimal scars for the patient, lower complication rates, and shorter treatment times. Ultrasound (US) is the preferred modality for guiding these procedures. The needle is usually kept within the US scanning plane to ensure needle visibility. However, this restricts flexibility in both transducer and needle movement and renders the procedure difficult, especially for inexperienced users...
March 22, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28331778/identification-of-scintillation-signatures-on-gps-signals-originating-from-plasma-structures-detected-with-eiscat-incoherent-scatter-radar-along-the-same-line-of-sight
#3
Biagio Forte, Chris Coleman, Susan Skone, Ingemar Häggström, Cathryn Mitchell, Federico Da Dalt, Tommaso Panicciari, Joe Kinrade, Gary Bust
Ionospheric scintillation originates from the scattering of electromagnetic waves through spatial gradients in the plasma density distribution, drifting across a given propagation direction. Ionospheric scintillation represents a disruptive manifestation of adverse space weather conditions through degradation of the reliability and continuity of satellite telecommunication and navigation systems and services (e.g., European Geostationary Navigation Overlay Service, EGNOS). The purpose of the experiment presented here was to determine the contribution of auroral ionization structures to GPS scintillation...
January 2017: Journal of Geophysical Research. Space Physics
https://www.readbyqxmd.com/read/28318915/computer-assisted-positioning-of-the-proximal-segment-after-sagittal-split-osteotomy-of-the-mandible-preclinical-investigation-of-a-novel-electromagnetic-navigation-system
#4
Igor Nova, Sebastian Kallus, Moritz Berger, Oliver Ristow, Urs Eisenmann, Christian Freudlsperger, Jürgen Hoffmann, Hartmut Dickhaus
INTRODUCTION: Modifications of the temporomandibular joint position after mandible osteotomy are reluctantly accepted in orthognathic surgery. To tackle this problem, we developed a new navigation system using miniaturized electromagnetic sensors. Our imageless navigation approach is therefore optimized to avoid complications of previously proposed optical approaches such as the interference with established surgical procedures and the line of sight problem. MATERIAL AND METHODS: High oblique sagittal split osteotomies were performed on 6 plastic skull mandibles in a laboratory under conditions comparable to the operating theatre...
February 17, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28314525/intraoperative-electromagnetic-navigational-bronchoscopic-localization-of-small-deep-or-subsolid-pulmonary-nodules
#5
Abbas Abbas, Sagar Kadakia, Vishnu Ambur, Kimberly Muro, Larry Kaiser
BACKGROUND: Localizing small or deep pulmonary nodules or subsolid ground-glass opacities often is difficult during video-assisted thoracoscopic surgery (VATS) or robotic-assisted thoracoscopic surgery (RATS). This can result in larger resections or conversion to thoracotomy. The goal of this study is to evaluate the role of electromagnetic navigational bronchoscopic localization (ENBL) as a safe and accurate intraoperative method to localize small, deep, or subsolid nodules. METHODS: This is a single-institution, single-surgeon retrospective study of all patients (51) who underwent combined ENBL and resection of 54 nodules between May 2013 and August 2015...
February 7, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28296957/computer-assisted-electromagnetic-navigation-improves-accuracy-in-computed-tomography-guided-interventions-a-prospective-randomized-clinical-trial
#6
Pierre Durand, Alexandre Moreau-Gaudry, Anne-Sophie Silvent, Julien Frandon, Emilie Chipon, Maud Médici, Ivan Bricault
PURPOSE: To assess the accuracy and usability of an electromagnetic navigation system designed to assist Computed Tomography (CT) guided interventions. MATERIALS AND METHODS: 120 patients requiring a percutaneous CT intervention (drainage, biopsy, tumor ablation, infiltration, sympathicolysis) were included in this prospective randomized trial. Nineteen radiologists participated. Conventional procedures (CT group) were compared with procedures assisted by a navigation system prototype using an electromagnetic localizer to track the position and orientation of a needle holder (NAV group)...
2017: PloS One
https://www.readbyqxmd.com/read/28271358/ultrasound-navigated-radiofrequency-ablation-of-thyroid-nodules-with-integrated-electromagnetic-tracking-comparison-with-conventional-ultrasound-guidance-in-gelatin-models
#7
Christian Erbelding, Alfred Franz, Alexander Seitel, Nasrin Bopp, Konstantin Kohlhase, Frank Grünwald, Lena Maier-Hein
PURPOSE: A thyroid-like gelatin model was used to determine potential superiority of a new navigation system for ultrasound (US)-guided electrode insertion called EchoTrack, featuring a US probe with an integrated electromagnetic field generator, in comparison with conventional US when performing radiofrequency ablation. METHODS: In order to compare 20 navigated ablations with 20 ablations under conventional US guidance, a thyroid-like gelatin model was used. In each group, 10 in-plane and 10 out-of-plane punctures were performed...
March 7, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28254399/use-of-an-electromagnetic-navigation-system-on-a-phantom-as-a-training-simulator-for%C3%A2-ct-guided-procedures
#8
Yadiel Sánchez, Dmitry S Trifanov, Taj M Kattapuram, Haiyang Tao, Anand M Prabhakar, Ronald S Arellano, Raul N Uppot
No abstract text is available yet for this article.
February 26, 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28248592/reply-same-day-computed-tomographic-chest-imaging-for-pulmonary-nodule-targeting-with-electromagnetic-navigation-bronchoscopy-will-it-prevent-unnecessary-procedures
#9
Roy Semaan, Lonny Yarmus
No abstract text is available yet for this article.
March 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28248587/same-day-computed-tomographic-chest-imaging-for-pulmonary-nodule-targeting-with-electromagnetic-navigation-bronchoscopy-will-it-prevent-unnecessary-procedures
#10
Abhishek Kumar, Kassem Harris
No abstract text is available yet for this article.
March 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28221151/-techniques-for-percutaneous-access-during-percutaneous-nephrolithotomy
#11
Daniel Pérez-Fentes
The creation of the access is one of the main steps in percutaneous nephrolithotomy, the most complicated for many urologists and the one that limited most the universalization of the technique. From a purely technical point of view, it includes puncture of the excretory tract and dilatation of the percutaneous tract to end with the introduction of an Amplatz type working sheath. The objective of the puncture is to try to access the excretory system through the renal papilla, minimizing the risk of bleeding...
January 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28217826/in-vivo-comparison-of-two-navigation-systems-for-abdominal-percutaneous-needle-intervention
#12
Deqiang Xiao, Yong Li, Huoling Luo, Yanfang Zhang, Xuejun Guo, Huimin Zheng, Qingmao Hu, Fucang Jia
PURPOSE: To compare the accuracy of a Kinect-Optical navigation system with an electromagnetic (EM) navigation system for percutaneous liver needle intervention. MATERIALS AND METHODS: Five beagles with nine artificial tumors were used for validation. The Veran IG4 EM navigation system and a custom-made Kinect-Optical navigation system were used. Needle insertions into each tumor were conducted with these two guidance methods. The target positioning error (TPE) and the time cost of the puncture procedures were evaluated...
February 20, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28206930/using-electromagnetic-navigation-bronchoscopy-and-dye-injection-to-aid-in-video-assisted-lung-resection
#13
Jordan Brown, Thomas J Lee, Theresa Joiner, William Wrightson
Small (2 cm) peripheral lung lesions and ground glass opacities remain a difficult subset of lung lesions for the diagnosis and management of lung cancer. Surgical biopsy is more difficult for these lesions because intraoperative localization has to be made without the aid of direct visualization or manual palpation. Electromagnetic navigation bronchoscopy can be used in the operating room to identify a small peripheral lesion and marked using an injection of methylene blue, which can be seen on the visceral pleura of the lung...
November 1, 2016: American Surgeon
https://www.readbyqxmd.com/read/28182758/a-multimodal-image-guiding-system-for-navigated-ultrasound-bronchoscopy-ebus-a-human-feasibility-study
#14
Hanne Sorger, Erlend Fagertun Hofstad, Tore Amundsen, Thomas Langø, Janne Beate Lervik Bakeng, Håkon Olav Leira
BACKGROUND: Endobronchial ultrasound transbronchial needle aspiration (EBUS-TBNA) is the endoscopic method of choice for confirming lung cancer metastasis to mediastinal lymph nodes. Precision is crucial for correct staging and clinical decision-making. Navigation and multimodal imaging can potentially improve EBUS-TBNA efficiency. AIMS: To demonstrate the feasibility of a multimodal image guiding system using electromagnetic navigation for ultrasound bronchoschopy in humans...
2017: PloS One
https://www.readbyqxmd.com/read/28177181/radial-endobronchial-ultrasound-for-the-diagnosis-of-peripheral-pulmonary-lesions-a-systematic-review-and-meta-analysis
#15
REVIEW
Muhammad S Ali, William Trick, Benjamin I Mba, Divyanshu Mohananey, Jaskaran Sethi, Ali I Musani
Tissue diagnosis of peripheral pulmonary lesions (PPLs) can be challenging. In the past, flexible bronchoscopy was commonly performed for this purpose but its diagnostic yield is suboptimal. This has led to the development of new bronchoscopic modalities such as radial endobronchial ultrasound (R-EBUS), electromagnetic navigation bronchoscopy (ENB) and virtual bronchoscopy (VB). We performed this meta-analysis using data from previously published R-EBUS studies, to determine its diagnostic yield and other performance characteristics...
April 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28172643/subclavian-access-using-a-three-dimensional-electromagnetic-cardiovascular-navigation-system-novel-approach-to-access-the-venous-system-during-device-implant-procedures
#16
Bernard Thibault, Kyungmoo Ryu, Amit Cohen, Peter G Guerra
No abstract text is available yet for this article.
February 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28149583/the-role-of-bronchoscopy-in-the-diagnosis-of-airway-disease
#17
REVIEW
Tyler J Paradis, Jennifer Dixon, Brandon H Tieu
Endoscopy of the airway is a valuable tool for the evaluation and management of airway disease. It can be used to evaluate many different bronchopulmonary diseases including airway foreign bodies, tumors, infectious and inflammatory conditions, airway stenosis, and bronchopulmonary hemorrhage. Traditionally, options for evaluation were limited to flexible and rigid bronchoscopy. Recently, more sophisticated technology has led to the development of endobronchial ultrasound (EBUS) and electromagnetic navigational bronchoscopy (ENB)...
December 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28149581/recent-advances-in-diagnostic-bronchoscopy
#18
REVIEW
Philip G Ong, Labib G Debiane, Roberto F Casal
The field of diagnostic bronchoscopy has been revolutionized in the last decade primarily with the advent of endobronchial ultrasound (EBUS) but also with the addition of multiple different techniques for "guided-bronchoscopy". These advances have had a substantial impact in the management of lung cancer with bronchoscopy now providing both diagnosis and mediastinal staging in a single procedure. EBUS has, in fact, become the first choice for staging of the mediastinum over cervical mediastinoscopy (CM). Although EBUS is now a well-established technique, there are continuous efforts from the scientific community to improve its diagnostic performance, and these will be reviewed in this manuscript...
December 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28134824/a-new-adaptable-optical-high-resolution-3-axis-sensor
#19
Niels Buchhold, Christian Baumgartner
This article presents a new optical, multi-functional, high-resolution 3-axis sensor which serves to navigate and can, for example, replace standard joysticks in medical devices such as electric wheelchairs, surgical robots or medical diagnosis devices. A light source, e.g., a laser diode, is affixed to a movable axis and projects a random geometric shape on an image sensor (CMOS or CCD). The downstream microcontroller's software identifies the geometric shape's center, distortion and size, and then calculates x, y, and z coordinates, which can be processed in attached devices...
January 27, 2017: Sensors
https://www.readbyqxmd.com/read/28115826/interactive-navigation-guided-ophthalmic-plastic-surgery-the-utility-of-3d-ct-dcg-guided-dacryolocalization-in-secondary-acquired-lacrimal-duct-obstructions
#20
Mohammad Javed Ali, Swati Singh, Milind N Naik, Swathi Kaliki, Tarjani Vivek Dave
AIM: The aim of this study was to report the preliminary experience with the techniques and utility of navigation-guided, 3D, computed tomography-dacryocystography (CT-DCG) in the management of secondary acquired lacrimal drainage obstructions. METHODS: Stereotactic surgeries using CT-DCG as the intraoperative image-guiding tool were performed in 3 patients. One patient had nasolacrimal duct obstruction (NLDO) following a complete maxillectomy for a sinus malignancy, and the other 2 had NLDO following extensive maxillofacial trauma...
2017: Clinical Ophthalmology
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