Title :
Finite Difference formulation to calculate the induced current density profile inside the retina by a microcoil array
Author :
Srinivas, Sundar ; George, John S. ; Lazzi, Gianluca
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC
Abstract :
Micromagnetic stimulation of the retina is currently being studied by our group. In this regard we analyzed the induced current density profiles inside the GCL of retina by an array of coils carrying time varying currents. We estimate a peak current density of around 100 A/m2 induced inside the GCL using a Magnetic stimulator circuit which uses the principles of under damped LCR oscillations. The induced current density profile shows a very good focus of currents just beneath each individual stimulator which is intended for good retinal stimulations. Further work is being carried out to implement an actual miniature magnetic stimulator circuit.
Keywords :
current density; eddy currents; eye; finite difference methods; neuromuscular stimulation; electrode array; finite difference formulation; induced current density profile; microcoil array; neural stimulation; retina; retinal ganglion cell layer; retinal prosthesis; Coils; Current density; Eddy currents; Electrodes; Ferrites; Finite difference methods; Magnetic fields; Permeability; Quantum computing; Retina;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2041-4
Electronic_ISBN :
978-1-4244-2042-1
DOI :
10.1109/APS.2008.4619688
