| Assessment of the exposure to WLAN frequencies of a head model with a cochlear implant. | |
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MedLine Citation:
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PMID: 20683910 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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In the last few years, significant developments have taken place in the field of Wireless Local Area Networks (WLAN), and the popularity of portable devices supporting Wireless Fidelity (Wi-Fi) is continuously growing. At the same time, the number of Active Implanted Medical Devices (AIMD) being placed in patients is widely increasing and among them, cochlear implants (CI) are becoming a common aid. The goal of this study is to investigate the effect on the electromagnetic field distribution and the specific absorption rate (SAR) due to the presence of a CI in a head model during far-field exposure to Wi-Fi frequencies. The head model was obtained by image segmentation, the implant was modelled as a geometric structure, and the exposure sources were modelled as a uniform plane wave (power density = 10 W/m(2)) at 2.4, 5.2 and 5.8 GHz. Vertical and horizontal polarizations were simulated. Conditions with and without CI were compared. The findings of that are: (1) local differences in the field distribution close to the CI, comparing the head models with or without the CI; (2) higher field strength and point SAR value in the cochlear region very close to the CI; (3) negligible differences in the field strength and point SAR value in the cochlear region far from the CI; (4) negligible variations in the average SAR values in the cochlea and head due to the presence of the CI. The results of this study conclude that insertion of a CI brings moderate localized differences in the E, H and point SAR distribution when evaluated close to the electrode array in the cochlea, while negligible differences are found in the average SAR values both in the cochlea and head, independent of frequency and wave polarization. |
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Authors:
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Marta Parazzini; Federica Sibella; Alessia Paglialonga; Paolo Ravazzani |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Bioelectromagnetics Volume: 31 ISSN: 1521-186X ISO Abbreviation: Bioelectromagnetics Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8008281 Medline TA: Bioelectromagnetics Country: United States |
Other Details:
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Languages: eng Pagination: 546-55 Citation Subset: IM |
Affiliation:
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Istituto di Ingegneria Biomedica, Consiglio Nazionale delle Ricerche, Milano, Italy. marta.parazzini@polimi.it |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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