نتایج جستجو برای: helmholtz coils
تعداد نتایج: 14236 فیلتر نتایج به سال:
PURPOSE To compare the efficacy and biocompatability of electrolytic and mechanically detachable embolization coils of two metal types. METHODS Experimental saccular aneurysms in pigs were used to assess embolization induced by platinum or tungsten coils. Longitudinal angiographic and histologic studies were performed on treated and untreated (control) aneurysms to compare thrombosis and cell...
A wireless power transfer system via magnetic resonance has been reported by several groups [1-3]. In those reports, two resonance coils work as a transmission coil and a reception coil, respectively. The transfer efficiency between two coils is a function of the distance and the orientation between the coils. When the distance between the two coils is long, the transfer efficiency is small. Wh...
The scleral search coil technique is commonly used for recording eye movements. The goal of this paper is to investigate to what extent the placement of scleral search coils onto the eyes influences the kinematics of saccades. To that end saccadic eye movements of human subjects were recorded with an infrared video system, while they wore coils and we compared the main sequence properties with ...
Current interest in the application of pulsed electromagnetic field (PEMF) as alternative therapy for different medical conditions has proved to be successful. A number of investigations demonstrated that low frequency PEMF enables the induction of significant current in tissues and allows for an enhanced biological effect and thus, can facilitate wound healing. In our previous study [1] we pre...
Two independent laboratories have demonstrated that electromagnetic radiation at specific frequencies can cause a change in the efflux of calcium ions from brain tissue in vitro. In a local geomagnetic field (LGF) at a density of 38 microTesla (microT), 15- and 45-Hz electromagnetic signals (40 Vp-p/m in air) have been shown to induce a change in the efflux of calcium ions from the exposed tiss...
An attempt was made to test the sensitivity of homing pigeons to weak magnetic variations of the order of the ones naturally occurring on earth. Pigeons were first subjected to a cardiac orienting reflex test to 50 magnetic stimuli and to 50 control stimuli presented alone and randomly interdigitated. They were then subjected to a differential nociceptive conditioning procedure using the same m...
Introduction: Essure® device malposition is a rare, but clinically significant complication, for which management is idiosyncratic. This case report describes an unusual example of Essure® migration in order to clarify reasonable management options. Case Presentation: A 50-year old G4P2022 underwent hysteroscopi...
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