Computed SAR and thermal elevation in a 0.25-mm 2-D model of the human eye and head in response to an implanted retinal stimulator - part II: results

This is the second of a series of two papers on the thermal increase in the human eye and head in response to an implanted retinal stimulator. This paper provides specific absorption rates induced in the human head by the extraocular unit and the temperature increases associated with induced electro...

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Bibliographic Details
Published inIEEE transactions on antennas and propagation Vol. 51; no. 9; pp. 2286 - 2295
Main Authors Lazzi, G., DeMarco, S.C., Wentai Liu, Weiland, J.D., Humayun, M.S.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.09.2003
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Antennas
Blood flow
Coils
Computation
Electromagnetic fields
Elevation
Finite difference methods
Human
Humans
Implants
Power dissipation
Prosthetics
Retina
Specific absorption rate
Stimulators
Temperature
Time domain analysis
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Summary:This is the second of a series of two papers on the thermal increase in the human eye and head in response to an implanted retinal stimulator. This paper provides specific absorption rates induced in the human head by the extraocular unit and the temperature increases associated with induced electromagnetic fields and power dissipation of the implanted microchip. Results are provided for different assumptions about choroid blood flow. It is shown that computed results associated with the power dissipation of the implanted microchip, corresponding to temperature increases of approximately 0.6/spl deg/C in the midvitreous of the eye and 0.2/spl deg/C in the retina, closely parallel in-vivo experimental results in animals.
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ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2003.816394