Title :
Improved magnetoencephalography source reconstruction considering anatomical connectivity of cortical sources
Author :
An, Kwang-Ok ; Im, Chang-Hwan ; Lee, Chany ; Jung, Hyun-Kyo ; Jung, Ki-Young
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ.
fDate :
4/1/2006 12:00:00 AM
Abstract :
In this paper, an improved magnetoencephalography (MEG) source reconstruction technique considering anatomical connectivity of cortical sources is proposed. The anatomical connectivity information was taken into account by calculating three-dimensional geodesic distance between neighboring sources, and then the resultant inverse solutions were compared with those of other cases:1)Inverse estimate without connectivity information; 2)Use of Euclidean distance instead of geodesic distance. The proposed technique was applied to realistic simulations for a real brain anatomy, and the results showed that estimated sources can be smoother and more accurate by using the anatomical connectivity information
Keywords :
bioelectric potentials; brain; magnetoencephalography; medical signal processing; signal reconstruction; 3D geodesic distance; Euclidean distance; Wiener estimation; anatomical connectivity; brain anatomy; cortical sources; magnetoencephalography source reconstruction; Anatomy; Brain modeling; Cerebral cortex; Covariance matrix; Electroencephalography; Euclidean distance; Image reconstruction; Inverse problems; Magnetic field measurement; Magnetoencephalography; 3-D geodesic distance; Anatomical connectivity; Wiener estimation; magnetoencephalography (MEG) source reconstruction;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.871635
