On the Thermal Elevation of a 60-Electrode Epiretinal Prosthesis for the Blind

Autor:	Arup Roy, Mark S. Humayun, V. Singh, Richard G. Castro, K. McClure, R. Dai, Robert J. Greenberg, Rajat Agrawal, James D. Weiland, Gianluca Lazzi
Rok vydání:	2008
Předmět:	Human head Computer science medicine.medical_treatment Work (physics) Biomedical Engineering Elevation Finite difference method Prosthesis Power (physics) Alternating direction implicit method medicine Implant Electrical and Electronic Engineering Biomedical engineering
Zdroj:	IEEE Transactions on Biomedical Circuits and Systems. 2:289-300
ISSN:	1940-9990 1932-4545
Popis:	In this paper, the thermal elevation in the human body due to the operation of a dual-unit epiretinal prosthesis to restore partial vision to the blind affected by irreversible retinal degeneration is presented. An accurate computational model of a 60-electrode device dissipating 97 mW power, currently under clinical trials is developed and positioned in a 0.25 mm resolution, heterogeneous model of the human head to resemble actual conditions of operation of the prosthesis. A novel simple finite difference scheme combining the explicit and the alternating-direction implicit (ADI) method has been developed and validated with existing methods. Simulation speed improvement up to 11 times was obtained for the the head model considered in this work with very good accuracy. Using this method, solutions of the bioheat equation were obtained for different placements of the implant. Comparison with in-vivo experimental measurements showed good agreement.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc796a0e3e18aad7dfdd1e0005d59880 https://doi.org/10.1109/tbcas.2008.2003430 Zobrazit plný text záznamu