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Rozprawy doktorskie na temat „Retinal prosthesis”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Grossman, Nir. "Photogenetic retinal prosthesis." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6155.

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The last few decades have witnessed an immense effort to develop working retinal implants for patients suffering from retinal degeneration diseases such as retinitis pigmentosa. However, it is becoming apparent that this approach is unable to restore levels of vision that will be sufficient to offer significant improvement in the quality of life of patients. Herein, a new type of retinal prosthesis that is based on genetic expression of microbial light sensitive ion channel, Chanelrhodopsin-2 (ChR2), and a remote light stimulation is examined. First, the dynamics of the ChR2 stimulation is cha

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Sivaprakasam, Mohanasankar. "High density microstimulators for retinal prosthesis /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2006. http://uclibs.org/PID/11984.

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Caulfield, Russell Erich 1975. "Power limits influencing retinal prosthesis design." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86600.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2001.<br>Includes bibliographical references (p. 52-55).<br>by Russell Erich Caulfield.<br>S.M.

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Huang, Yan. "An optoelectronic stimulator for retinal prosthesis." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/4379.

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Retinal prostheses require the presence of viable population of cells in the inner retina. Evaluations of retina with Age-Related Macular Degeneration (AMD) and Retinitis Pigmentosa (RP) have shown a large number of cells remain in the inner retina compared with the outer retina. Therefore, vision loss caused by AMD and RP is potentially treatable with retinal prostheses. Photostimulation based retinal prostheses have shown many advantages compared with retinal implants. In contrary to electrode based stimulation, light does not require mechanical contact. Therefore, the system can be complete

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Wang, Guoxing. "Wireless power and data telemetry for retinal prosthesis /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2006. http://uclibs.org/PID/11984.

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Evans, Michael 1977. "Encapsulation of electronic components for a retinal prosthesis." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9077.

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Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.<br>Includes bibliographical references (p. 65).<br>Long-term success of an implantable retinal prosthesis depends on the ability to hermetically seal sensitive electronics from a saline environment with an encapsulant material. Furthermore, the retinal implant project's proposed laser-driven prosthesis requires that the encapsulation material be transparent. The device itself has two components that must protrude out of the encapsulation material. The first is an electro

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Grumet, Andrew Eli. "Electric stimulation parameters for an epi-retinal prosthesis." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9336.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.<br>Includes bibliographical references (p. 138-144).<br>This work was undertaken to contribute to the development of an epi-retinal prosthesis which may someday restore vision to patients blinded by outer retinal degenerations like retinitis pigmentosa. By stimulating surviving cells in tens or hundreds of distinct regions across the retinal surface, the prosthesis might convey the visual scene in the same way that images are represented on a computer screen. The anatomical and fu

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Zhou, Mingcui. "Data telemetry with interference cancellation for retinal prosthesis /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2007. http://uclibs.org/PID/11984.

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Luo, Y. H. "Argus® II Retinal Prosthesis System : clinical & functional outcomes." Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/1559629/.

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Developing artificial visual systems to restore sight in blind patients has long been the dream of scientists, clinicians and the public at large. After decades of research, the greatest success in the field has been achieved with electronic retinal prostheses. To date, 3 retinal prosthetic systems have made the transition from laboratory / clinical research to entering the commercial market for clinical use, namely the Argus® II Retinal Prosthesis System (Second Sight), the alpha-IMS system (Retinal Implant AG), and the IRIS® II (Pixium Vision). The following body of work describes the Argus®

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10

Dommel, Norbert Brian Graduate School of Biomedical Engineering Faculty of Engineering UNSW. "A vision prosthesis neurostimulator: progress towards the realisation of a neural prosthesis for the blind." Publisher:University of New South Wales. Graduate School of Biomedical Engineering, 2008. http://handle.unsw.edu.au/1959.4/41249.

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Restoring vision to the blind has been an objective of several research teams for a number of years. It is known that spots of light -- phosphenes -- can be elicited by way of electrical stimulation of surviving retinal neurons. Beyond this, however, our understanding of prosthetic vision remains rudimentary. To advance the realisation of a clinically viable prosthesis for the blind, a versatile integrated circuit neurostimulator was designed, manufactured, and verified. The neurostimulator provides electrical stimuli to surviving neurons in the visual pathway, affording blind patients some f

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Al-Yaman, Musa Salah Musa. "FPGA design and implementation of a framework for optogenetic retinal prosthesis." Thesis, University of Newcastle upon Tyne, 2015. http://hdl.handle.net/10443/2861.

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There are 285 million people worldwide with a visual impairment, 39 million of whom are completely blind and 246 million partially blind, known as low vision patients. In the UK and other developed countries of the west, retinal dystrophy diseases represent the primary cause of blindness, especially Age Related Macular Degeneration (AMD), diabetic retinopathy and Retinitis Pigmentosa (RP). There are various treatments and aids that can help these visual disorders, such as low vision aids, gene therapy and retinal prosthesis. Retinal prostheses consist of four main stages: the input stage (Imag

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Moss, Joshua D. (Joshua David) 1975. "Mechanical design and analysis of implantable components for a retinal prosthesis." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/32693.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.<br>Includes bibliographical references (p. 89-91).<br>The success of a retinal prosthesis in restoring vision to blind patients will be dependent on its long term viability when implanted in the eye. This thesis addresses mechanical aspects relating to the biocompatibility of the device and its ability to survive in a saline environment. Chronic testing of a working prosthesis requires hermetic encapsulation of all implanted electronics; any direct contact with the fluid in the eye will damage the circ

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Siu, Timothy Lok Tin Medical Sciences Faculty of Medicine UNSW. "Artificial vision: feasibility of an episcleral retinal prosthesis & implications of neuroplasticity." Awarded By:University of New South Wales. Medical Sciences, 2009. http://handle.unsw.edu.au/1959.4/42879.

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Background. A visual prosthesis is a conceptual device designed to activate residual functional neurons in the visual pathway of blind individuals to produce artificial vision. Such device, when applied to stimulate the vitreous surface of the retina, has proven feasible in producing patterned light perception in blind individuals suffering from dystrophic diseases of the retina, such as aged-related macular degeneration (AMD). However the practicality of such approach has been challenged by the difficulty of surgical access and the risks of damaging the neuroretina. Positioning a visual impla

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Park, Christina Soyeun 1980. "Characterizing the material properties of polymer-based microelectrode arrays for retinal prosthesis." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/89907.

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Eggenberger, Samuel Christian. "Towards clinical trials of a novel Bionic Eye: Building evidence of safety and efficacy." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29625.

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In the quest for therapeutic solutions for the visually impaired, electrical stimulation of the retina is, and has been, the focus of intense research. Some of these efforts have led to the development of the Phoenix99 Bionic Eye, a device which combines promising technological features with novel stimulation strategies. For medical devices, considerable challenges must be overcome before they’re allowed to be trialled in their target population. The requirements for a study to be performed include the demonstration of a positive risk-benefit ratio of the research. The present dissertation is

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Bec, Jean-Michel. "Etude de la stimulation laser de neurones pour des applications de prothèses visuelles." Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20029/document.

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Ce travail se situe dans le cadre d'un projet pluridisciplinaire visant à développer une prothèse visuelle. La technique la plus utilisée actuellement dans de nombreux types de neuroprothèses est basée sur l'excitation par voie électrique via des électrdes. Les inconvénients d'une telle technique (très invasive, de faible résolution spatiale et par contact) pourraient être surmontés en utilisant une stimulation par laser infra-rouge. Nous présentons dans un premier temps les caractéristiques des trois diodes lasers fibrés émettant à 1875 nm, 1535 nm et 1470 nm pour des gammes de puissances opt

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17

Mailhot, Nathaniel. "Pupil Tracking and Control of a Laser Based Power System for a Vision Restoring Retinal Implant." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/38709.

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For elderly Canadians, the prevalence of vision impairment caused by degenerative retinal pathologies, such as age-related macular degeneration and retinitis pigmentosa, is at an occurrence rate of 14 percent, and on the rise. It has been shown that visual function can be restored by electrically stimulating intact retinal tissue with an array of micro-electrodes with suitable signals. Commercial retinal implants carrying such a micro-electrode array achieve this, but to date must receive power and data over copper wire cable passing through a permanent surgical incision in the eye wall

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18

Matonti, Frédéric. "Analyse de la réponse rétinienne et corticale à la stimulation électrique par implant sous-rétinien sur le modèle murin." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM5098.

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L’objectif de cette thèse est la validation fonctionnelle d’implants rétiniens pour la restauration fonctionnelle de la vision chez des patients non voyants suite à la perte de leurs photorécepteurs. Ce travail a été réalisé sur modèle animal et a évalué expérimentalement de nouveaux protocoles de stimulation. Tout d’abord nous avons utilisé la technique de spectroscopie d’impédance pour simuler mathématiquement l’interface tissu-implantafin de caractériser la présence d’un espace entre le tissu et l’implant. La seconde partie compare par imagerie optique (IO) les caractéristiques de la répons

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Tran, Trung Kien. "Large scale retinal modeling for the design of new generation retinal prostheses." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/29175/.

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With the help of modern technology, blindness caused by retinal diseases such as age-related macular degeneration or retinitis pigmentosa is now considered reversible. Scientists from various fields such as Neuroscience, Electrical Engineering, Computer Science, and Bioscience have been collaborating to design and develop retinal prostheses, with the aim of replacing malfunctioning parts of the retina and restoring vision in the blind. Human trials conducted to test retinal prostheses have yielded encouraging results, showing the potential of this approach in vision recovery. However, a retina

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20

Roach, Kenneth L. (Kenneth Lee) 1979. "Electrochemical models for electrode behavior in retinal prostheses." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29955.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.<br>Includes bibliographical references (p. 155-164).<br>The focus of this thesis is the modeling, characterization, and improvement of microfabricated electrodes for the Retinal Implant Project. The ultimate goal of the Project is to build a retinal prosthesis able to restore a limited degree of visual function in people suffering from certain types of blindness. An important step in this process is the design and fabrication of a safe, efficient, and effective electrode array. D

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21

Huang, Fei. "Electrophysiological Studies of a Retinal Prosthetic Prototype." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/970.

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"Retinal prostheses are becoming a viable therapy for inner retinal degeneration caused by age related macular degeneration (AMD) and retinitis pigmentosa (RP). The majority of ocular and periocular prosthetic devices employ photodiodes and a microelectrode interface to convert light into a nerve impulse within the retina. Problems with this design include the need of an external power source, the lack of biocompatibility of the microelectrode array, and the need for complicated surgical procedures. Self-assembled monolayer (SAM) technology offers an alternative strategy, where neurons can be

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Sabatier, Quentin. "Development and validation of stimulation strategies for the optogenetics." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS083.

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Un million et demi de personnes souffrent de la Rétinopathie Pigmentaire, une famille de maladies héréditaires entraînant une dégénérescence de la rétine. La maladie commence par la perte de la vision nocturne et du champ visuel périphérique et mène à une cécité totale. En raison de l'hétérogénéité des mutations génétiques responsables de la maladie, des solutions visant à compenser les symptômes de la maladie émergent. Ces prothèses rétiniennes comportent trois éléments : (i) une caméra filmant la scène devant le patient, habituellement montée sur une paire de lunettes et (ii) un dispositif d

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23

Van, Der Meer Valentina. "Characterization of faradaic and capacitive processes in organic photoelectrodes for artificial retina prosthesis." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18406/.

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An increasing number of studies about artificial retinal prothesis have been carried out recently demonstrating the possibility to restore sight in partially sighted or blind patients. In all of such devices the fundamental component is an opotobioelectronic layer. When illuminated, this layer produces ionic current pulses of enough intensity to activate the visual cortex’s neurons. The principal objective to achieve is the deep understanding of the processes that occur at the semiconductor-liquid interface, with the purpose to develop materials that present flexibility and biocompatibility an

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Maghribi, M. "Microfabrication of an Implantable silicone Microelectrode array for an epiretinal prosthesis." Washington, D.C : Oak Ridge, Tenn. : United States. Dept. of Energy ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2003. http://www.osti.gov/servlets/purl/15005780-5uYpbJ/native/.

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Thesis (Ph.D.); Submitted to the Univ. of California, Davis, CA (US); 10 Jun 2003.<br>Published through the Information Bridge: DOE Scientific and Technical Information. "UCRL-LR-153347" Maghribi, M. 06/10/2003. Report is also available in paper and microfiche from NTIS.

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Eleftheriou, Cyril. "Developing a new generation of neuro-prosthetic interfaces : structure-function correlates of viable retina-CNT biohybrids." Thesis, University of Newcastle upon Tyne, 2013. http://hdl.handle.net/10443/2164.

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One of the many challenges in the development of neural prosthetic devices is the choice of electrode material. Electrodes must be biocompatible, and at the same time, they must be able to sustain repetitive current injections in a highly corrosive physiological environment. We investigated the suitability of carbon nanotube (CNT) electrodes for retinal prosthetics by studying prolonged exposure to retinal tissue and repetitive electrical stimulation of retinal ganglion cells (RGCs). Experiments were performed on retinal wholemounts isolated from the Cone rod homeobox (CRX) knockout mouse, a m

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Sousa, Andréa Alves de. ""Análise comparativa entre sistemas de retenção para próteses auriculares implanto-retidas"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/23/23144/tde-22052006-120719/.

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As próteses auriculares retidas por meio de implantes osseointegráveis proporcionam maior segurança e conforto, melhorando a qualidade de vida dos pacientes. Este trabalho avalia comparativamente a força de resistência à tração dos sistemas de retenção barra/2 clipes, barra/3 clipes, 2 magnetos, e 3 magnetos, empregados para retenção de prótese auricular. Os sistemas de retenção foram submetidos à ciclagem mecânica, com intervalos de 540 ciclos de inserção e remoção para a simulação de períodos de uso clínico, até um total de 3240 ciclos, sendo, a cada intervalo, submetidos ao ensaio mecânico

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Daroz, Luiz Gustavo Dias. "Comportamento mecanico de restaurações multiplas implanto-retidas frente a presença de desajustes marginais." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289182.

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Orientador: Guilherme Elias Pessanha Henriques<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-12T22:13:01Z (GMT). No. of bitstreams: 1 Daroz_LuizGustavoDias_D.pdf: 1960257 bytes, checksum: 5da5124c6018514dbf5ec8de5bf7228a (MD5) Previous issue date: 2009<br>Resumo: A obtenção de uma estrutura protética passivamente adaptada aos implantes e pilares de conexão tem sido sugerida como fundamental para se evitar falhas mecânicas e biológicas nas reabilitações implanto-retidas. Um melhor entendimento dos efeitos

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Abreu, Celina Wanderley de 1982. "Análise extensométrica e do desajuste marginal de infra-estruturas implanto-retidas nas configurações linear e compensada com diferentes coifas sob aplicação de cargas axiais e não axiais." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288544.

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Orientador: Rafael Leonardo Xediek Consani<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-19T03:08:59Z (GMT). No. of bitstreams: 1 Abreu_CelinaWanderleyde_D.pdf: 708429 bytes, checksum: e7e9243a443a7387eced5b96c49b0b3c (MD5) Previous issue date: 2011<br>Resumo: O objetivo neste estudo in vitro, foi analisar microscopicamente o desajuste vertical e passivo e quantificar a deformação usando análise de extensometria durante aplicação de carga axial e não-axial em prótese parcial fixa implanto-suportada de tr

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Ribeiro, Paula do Prado. "Análise fotoelástica da tensão entre diferentes tipos de sistemas de retenção em próteses obturadoras palatinas implanto-retidas ou não e com ou sem reembasamento "soft" /." Araçatuba, 2009. http://hdl.handle.net/11449/97399.

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Resumo: O câncer da região de cabeça e pescoço é uma doença muito prevalente no Brasil, e as principais formas de tratamento são a cirurgia acompanhada ou não da radioterapia e quimioterapia. Perdas parciais ou totais de osso maxilar podem comprometer seriamente a fisiologia bucal causando sequelas como comunicações buconasosinosal. Neste caso, podese optar como forma de tratamento pela reabilitação protética com a aplicação de implantes osseointegrados. A literatura odontológica tem mostrado inúmeros trabalhos que avaliam a distribuição de forças com a finalidade de recolher melhores subsídio

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Torres, José Walter Murta 1958. "Influência dos ciclos de cocção da porcelana na força de destorque de parafusos de estruturas implanto-retidas." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289175.

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Orientador: Guilherme Elias Pessanha Henriques<br>Tese (Doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-21T23:50:10Z (GMT). No. of bitstreams: 1 Torres_JoseWalterMurta_D.pdf: 1581851 bytes, checksum: 0bbcce2409164d19a4e51f955b38d595 (MD5) Previous issue date: 2013<br>Resumo: Este trabalho avaliou a resistência ao destorque em parafusos de estruturas metálicas implanto-retidas fundidas em níquel-cromo (Ni-Cr) após fundição e simulação dos ciclos de cocção da porcelana. Dois implantes hexágono externo - com 3,75 mm d

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Costa, Valéria Tognato. "Avaliação das tensões ósseas geradas por prótese obturadora maxilar implanto-retida pelo sistema ERA® por meio da análise de elementos finitos." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/23/23152/tde-30092016-170925/.

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Visando melhorar a qualidade de vida dos pacientes com perdas de estrutura maxilar faz-se necessária sua reabilitação, seja ela cirúrgica ou protética por meio de próteses obturadoras, esta última, um recurso terapêutico que minimiza os distúrbios funcionais, estéticos e psicológicos. Este estudo avaliou o comportamento biomecânico de prótese obturadora maxilar Classe II de Okay retida por implantes e sistema de retenção ERA®, observando as tensões geradas no tecido gengivo-mucoso e ósseo maxilar. A Análise de Elementos Finitos foi realizada empregando-se um modelo digital desenvolvido a parti

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Sousa, Andréa Alves de. "Análise das tensões geradas por prótese obturadora maxilar implanto-retida por meio da análise de elementos finitos." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/23/23139/tde-14012013-145855/.

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Neste estudo avaliou-se o comportamento biomecânico de próteses obturadoras maxilares Classe Ib, II e III de Okay retidas por implantes, observando as tensões geradas no tecido ósseo e gengivo-mucoso maxilar. A Análise de Elementos Finitos foi realizada empregando-se um modelo digital desenvolvido a partir de uma tomografia computadorizada de um indivíduo adulto. Utilizou-se o programa Rhinoceros® versão 4.0 SR9 para gerar o modelo maxilar BioCAD 3D, incorporando-se os modelos CAD dos implantes e UCLAS. Os implantes foram posicionados de acordo com cada modelo: Modelo 1 (Classe Ib de Okay): 6

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Tramontino-Mesquita, Vanessa Silva 1982. "Proteses fixas implanto-retidas : influencia do pilar intermediario e dos ciclos de cocção da ceramica nos desajustes e nas tensões induzidas as fixações." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289183.

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Orientador: Guilherme Elias Pessanha Henriques<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-10T13:58:31Z (GMT). No. of bitstreams: 1 Tramontino-Mesquita_VanessaSilva_M.pdf: 2155429 bytes, checksum: 5050e6eb80efb708a774530922aee871 (MD5) Previous issue date: 2008<br>Resumo: Especula-se que ciclos de cocção da cerâmica geram aumento nos desajustes marginais. Em próteses sobre implantes se imagina que possam motivar aumento das tensões induzidas às fixações, tensões estas, que podem variar em função

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Pontes, Roberta Bezerra. "Análise por meio de elementos finitos das tensões ósseas geradas por prótese obturadora maxilar implanto-retida através dos sistemas de retenção O\'ring e magneto." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/23/23152/tde-06032017-123428/.

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A Análise de Elementos Finitos (AEF) vem sendo utilizada em diversos trabalhos na Odontologia, pois possibilita que o estudo in vitro simule uma situação clínica real. Neste estudo utilizou-se a Análise de Elementos Finitos para avaliar as tensões geradas por prótese total obturadora maxilar Classe II de Okay retida por implantes e utilizando os sistemas de retenção O\'ring e magneto. Avaliaram-se as tensões geradas no tecido ósseo, gengivo-mucoso e barras metálicas após a aplicação de cargas nas mesas oclusal e incisal. A Análise de Elementos Finitos foi realizada empregando-se um modelo digi

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Tramontino-Mesquita, Vanessa Silva 1982. "Avaliação das tensões e do destorque de parafusos : influência do desajuste marginal e dos tipos de metais em infraestruturas protéticas retidas por implantes." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289176.

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Orientador: Guilherme Elias Pessanha Henriques<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-19T17:02:54Z (GMT). No. of bitstreams: 1 Tramontino-Mesquita_VanessaSilva_D.pdf: 1263598 bytes, checksum: 21599a6e0153542032add63750d48770 (MD5) Previous issue date: 2012<br>Resumo: O objetivo neste estudo foi avaliar a distribuição das tensões geradas aos implantes modificados, por meio de análise extensométrica e força de destorque dos parafusos de retenção protética, de acordo com o tipo de metal da infraestru

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Ribeiro, Paula do Prado [UNESP]. "Análise fotoelástica da tensão entre diferentes tipos de sistemas de retenção em próteses obturadoras palatinas implanto-retidas ou não e com ou sem reembasamento “soft”." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/97399.

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Made available in DSpace on 2014-06-11T19:28:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-04-13Bitstream added on 2014-06-13T20:18:39Z : No. of bitstreams: 1 ribeiro_pp_me_araca.pdf: 1296460 bytes, checksum: 0aa88d770aee2b3e8787125e444deac4 (MD5)<br>O câncer da região de cabeça e pescoço é uma doença muito prevalente no Brasil, e as principais formas de tratamento são a cirurgia acompanhada ou não da radioterapia e quimioterapia. Perdas parciais ou totais de osso maxilar podem comprometer seriamente a fisiologia bucal causando sequelas como comunicações buconasosinosal. Neste ca

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Sabbah, Norman. "Réorganisation cérébrale consécutive à la perte tardive d'une partie ou de la totalité du champ visuel et à la restitution sensorielle : approche comportementale et par IRM fonctionnelle." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066532/document.

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Les processus de plasticité cérébrale consécutifs à un déficit visuel survenu tardivement sont encore peu connus. En comprendre les mécanismes est pourtant essentiel à l'optimisation de méthodes de rééducation des sujets atteints, au développement de dispositifs visant à substituer l'information normalement apportée par la modalité déficiente, par celle d'une autre modalité sensorielle, et à la conception de systèmes permettant de restaurer une certaine fonction visuelle. Afin d'étudier ces processus, nous avons choisi d'une part, d'analyser la connectivité fonctionnelle du cerveau à l'état de

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Wong, Raymond Chi Shing. "Retinal ganglion cells : physiology and prosthesis." Phd thesis, 2013. http://hdl.handle.net/1885/156141.

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The retina is responsible for encoding different aspects of the visual world. Light enters the eyes and is converted by the photoreceptors into electrochemical signals. These signals are processed by the retinal network and proceed afferently to the brain via the axons of the retinal ganglion cells (RGCs). The RGCs outputs are in the form of action potentials (spikes), which encrypt the visual information in terms of spike shape, firing frequencies, and the firing patterns. When the photoreceptors are gone due to disease, vision is lost. The idea of a retinal prosthesis is to activate the surv

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Chung, Chia He, and 鍾嘉和. "Laplacian Algorithm Applied to Retinal Prosthesis Chip." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/65005111032364567292.

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Ye, Zong Hua, and 葉宗樺. "Retinal Prosthesis Signal Processing using Pulse Logic Approach." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/06239244976853755704.

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Liu, Ching-Yu, and 劉景玉. "A Contact-Lens-Shaped Silicon Chip Technology for Retinal Prosthesis." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/h5d769.

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Chen, Bing-Ke, and 陳秉科. "Accelerated Aging Study to Electrode Materials Used for Retinal Prosthesis." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/76117481136294161348.

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碩士<br>國立陽明大學<br>醫學工程研究所<br>98<br>Objective：It is difficulty to observe the damage occurred in a material for a short term mild electrochemical reaction, however, it can be observed through a prolong test. In order to observe the aging phenomenon in a material in a relative short time, we try to speed up the aging process in chosen materials. Method：Four kinds of metal, gold, platinum, titanium, and tantalum employed for electrode materials were chosen in this study. PSB solution was used as a medium for simulating the environment in retina. For each material, the conduction currents with magni

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Chen, Yi-Chung, and 陳奕中. "Vision Assist System for visually impaired people treated by retinal prosthesis." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/3zqrkm.

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碩士<br>國立交通大學<br>電子工程學系電子研究所<br>102<br>The vision quality of the visually impaired people treated by retinal prosthesis is largely affected by the vision resolution. Due to some related technical bottlenecks, how to make effective use of existing low-resolution screen becomes an important issue. This paper presents an eye-controlled visual aid system to achieve an efficient use of low-resolution vision by zooming in the user's interested objects (when staring, zoom-in; when closing eye, zoom-out). In order to better simulate the actual low-resolution vision of the patients, we have also design

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Yang, Frank, and 楊鎮在. "In vivo and in vitro technology for experimental artificial retinal prosthesis." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/t2xq5p.

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wang, Zhi-Ren, and 王志仁. "The Study of Bi-Phasic Current Stimulus Circuit for Retinal Prosthesis." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/46520162679876580712.

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碩士<br>聖約翰科技大學<br>自動化及機電整合研究所<br>96<br>Eyes are the most important for the human’s sense organ, and it is important way to obtain the external information source and view, too. If we lose vision will bring more inconvenience for living. Many research groups hope to resume vision for the lost visual person. Especially, degeneration of photoreceptor cells is to cause blind. The mainly reason is Age-related (Macular Degeneration) and pigment retinitis (Retinitis Pigmetosa). Now, the medical science and technology are improved, there are appearances of retina prosthesis. The technology is to implan

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Singh, Vinit. "Implantable devices for a retinal prosthesis design and electromagnetic and thermal effects /." 2008. http://www.lib.ncsu.edu/theses/available/etd-11182008-180713/unrestricted/etd.pdf.

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Kendir, Gurhan Alper. "An efficient transcutaneous power link desing to be used in retinal prosthesis." 2002. http://www.lib.ncsu.edu/theses/available/etd-01072003-120526/unrestricted/etd.pdf.

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Pundi, Bharatram Satyanarayanan. "Class-E power amplifier design and back-telemetry communication for retinal prosthesis." 2002. http://www.lib.ncsu.edu/theses/available/etd-01232003-221628/unrestricted/etd.pdf.

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Hadjinicolaou, Alexander. "Optimal electrical activation of retinal ganglion cells." Phd thesis, 2013. http://hdl.handle.net/1885/156160.

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Retinal prostheses are emerging as a viable therapy option for those blinded by degenerative eye conditions that destroy the photoreceptors of the retina but spare the retinal ganglion cells (RGCs). My research sought to address the issue of how a retinal prosthesis might best activate these cells by way of electrical stimulation. Whole-cell patch clamp recordings were made in explanted retinal wholemount preparations from normally-sighted rats. Stimulating electrodes were fabricated from nitrogen-doped ultra-nanocrystalline diamond (N-UNCD) and placed on the epiretinal surface, adjacent to th

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Wu, Yi-hsien, and 吳奕賢. "Design and analysis of wireless-transmission components of an implanted wireless retinal prosthesis." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/w37pm6.

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碩士<br>國立中央大學<br>電機工程研究所<br>96<br>Abstract The research and development of retinal prosthesis aims for restoration of sight in patients suffering from degenerative retinal diseases such as Retinitis Pigmentosa and Age-Related Macular Degeneration. In a wireless retinal prosthesis system, the quality of the wireless power and signal transmission appears to be the key to the system robustness. In this thesis, the design and analysis of the power and signal wireless-transmission components are demonstrated. Also, the evaluation of the impact of electromagnetic radiation from the components on

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