| Autor: |
Kosta, Pragya, Paknahad, Javad, Gamez Rodriguez, Erik Saturnino, Loizos, Kyle, Roy, Arup, Talbot, Neil, Seidman, Scott, Datta, Proyag, Dai, Rongqing, Pollack, Bret, Greenberg, Robert, Lazzi, Gianluca |
| Zdroj: |
IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology; 2018, Vol. 2 Issue: 1 p56-63, 8p |
| Abstrakt: |
A cortical visual prosthetic system bypasses the components of the visual pathway, which may be damaged due to injury or disease, by directly stimulating the visual cortex; therefore, cortical visual prostheses promise the capability of restoring a form of vision to patients who cannot benefit from other types of visual neural stimulators. A high data rate, multielectrode, implantable device, such as that utilized for a cortical visual prosthesis, requires continuous power provided by an external telemetry unit, which is nonnegligible, given the number of stimulating electrodes and the stimulation rate necessary to avoid flickering visual percepts. This aspect motivates the need to develop models and methods that aid the development of such devices by assessing their compliance with electromagnetic safety standards. In this paper, the electromagnetic safety assessment of a cortical visual prosthetic system is considered, and the solutions employed to numerically treat the computational complexities associated with it are discussed. The specifics of the implementation of an actual visual cortical implant are discussed, and the parameters of such an implant are used as a test case to determine whether IEEE and ICNIRP electromagnetic standards are met in what can be considered a typical embodiment of the prosthesis. Results show that, for the considered implant, such a system meets IEEE and ICNIRP safety standards, thus enabling further development of similar neurorehabilitative devices. |
| Databáze: |
Supplemental Index |
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