Accession Number : AD1031934


Title :   Cost-Effective Magnetoencephalography Based on Time Encoded Optical Fiber Interferometry for Epilepsy and Tinnitus


Descriptive Note : Technical Report,10 Dec 2014,09 Jun 2016


Corporate Author : University of California Irvine United States


Personal Author(s) : Xia,Jing


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1031934.pdf


Report Date : 01 Sep 2016


Pagination or Media Count : 19


Abstract : Functional neuroimaging is critical to the understanding and diagnosis of neurological disorders especially Epilepsy and Tinnitus. Both conditions severely harm servicemen and veterans wellbeing and combat capability, but are difficult to diagnose with anatomical tools like MRI and CT due to the functional nature of these disorders. In contrast Magnetoencephalography (MEG), which spatially monitors brain activities in real time has been proven effective at studying, screening and diagnosing Epilepsy and Tinnitus, providing insightful information for surgical treatments. The proposed MEG technique is based on two major innovations, whose feasibility will be tested in this project. (I) Interferometric magnetic detection: A Sagnac fiber interferometer will be constructed and used to perform magnetic sensing by measuring the magnetic-field-induced optical phase shift in optically pumped Rubidium (Rb) vapor placed outside patients head. This interferometric technique is expected to be more sensitive than existing atomic magnetometers.


Descriptors :   BRAIN DISEASES , MAGNETOENCEPHALOGRAPHY , NEUROLOGICAL DIAGNOSTIC TECHNIQUES , magnetometers , interferometers , military medicine , OPTICAL FIBERS


Subject Categories : Medicine and Medical Research


Distribution Statement : APPROVED FOR PUBLIC RELEASE