DocumentCode :
1833134
Title :
Realistic synthetic background neuronal activity for the analysis of MEG probe configurations
Author :
Badier, J.-M. ; Cosandier-Rimele, D. ; Benar, C.G. ; Schwartz, D. ; Chauvel, P. ; Wendling, F.
Author_Institution :
Aix Marseille Univ., Marseille
fYear :
2007
fDate :
22-26 Aug. 2007
Firstpage :
2460
Lastpage :
2463
Abstract :
Magnetoencephalography (MEG) sensors are capable of recording the tiny magnetic activity from the brain. They can be constituted of either magnetometers or gradiometers that respectively record the magnetic field or its gradient. In this paper, we present a framework for constructing realistic MEG signals. This framework can be used to test different probe configurations and source localization algorithms. The methodology of generation of synthetic signals is presented, and synthetic signals are compared to real signals. Paroxysmal activity generated with this model and originating from a deep cerebral source is determined with two different localization algorithms. Preliminary results show that gradiometers even with a short baseline perform close to magnetometer and that the use of hybrid systems should be further investigated.
Keywords :
magnetoencephalography; magnetometers; medical signal detection; neurophysiology; probes; MEG probe; brain; gradiometers; magnetoencephalography; magnetometers; neuronal activity; source localization algorithms; Brain modeling; Epilepsy; Magnetic field measurement; Magnetic noise; Magnetic sensors; Magnetometers; Noise measurement; Probes; Signal generators; Working environment noise; Algorithms; Brain; Brain Mapping; Computer Simulation; Epilepsy; Equipment Design; Humans; Magnetics; Magnetoencephalography; Models, Statistical; Neurons; Time Factors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society, 2007. EMBS 2007. 29th Annual International Conference of the IEEE
Conference_Location :
Lyon
ISSN :
1557-170X
Print_ISBN :
978-1-4244-0787-3
Type :
conf
DOI :
10.1109/IEMBS.2007.4352826
Filename :
4352826
Link To Document :
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