Title :
A magnetic source estimation in the cortical region
Author :
Mino, Kazuhiro ; Niki, Noboru ; Nakasato, Nobukazu ; Yoshimoto, Takashi
Author_Institution :
Fac. of Eng., Tokushima Univ., Japan
Abstract :
The region for estimation is limited to the surface of the cortex. Considering this limitation, the cortex is extracted from MR images. We assume that the points on the extracted cortex are current dipoles. All the acquired points are considered as candidate sources. We perform the estimation by means of the multiple signal classification (MUSIC) method which is applied to the limited region. In the MUSIC method, the measured magnetic field data is divided into two subspaces, the signal subspace and the noise subspace. The minimum description length (MDL) criterion is used for this division
Keywords :
biomedical NMR; brain; estimation theory; feature extraction; hearing; image classification; magnetoencephalography; medical image processing; neurophysiology; MDL criterion; MR image extraction; MUSIC method; auditory evoked magnetic field; cortex surface; cortical region; current dipoles; extracted cortex points; limited region; magnetic field data; magnetic source estimation; minimum description length; multiple signal classification; noise subspace; signal subspace; Data mining; Humans; Magnetic field measurement; Magnetic fields; Magnetic noise; Multiple signal classification; Noise measurement; SQUIDs; Superconducting device noise; Superconducting magnets;
Conference_Titel :
Image Processing, 1996. Proceedings., International Conference on
Conference_Location :
Lausanne
Print_ISBN :
0-7803-3259-8
DOI :
10.1109/ICIP.1996.560767
