Inverse Problems in Biomagnetic Fields
نویسندگان
چکیده
منابع مشابه
Inverse analysis of biomagnetic fields in consideration of the external magnetic noise
Even in magnetic shield, external magnetic field could not be neglected especially for magneto-meter system, and, it will be considered as uniform external noise. Also, the noise is caused by nearer external source, and is not uniform one of the noise. In this paper, the influence of the external uniform field and the external gradient noise on inverse problem solution by the SMN (Selective Min...
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In biomagnetic signal source activities, some are correlated, some are uncorrelated, and others are indifferent. If MEG (Magnetoencephalography) data have high signal to noise ratio, then the dominant components of the data are generated from such correlated, uncorrelated, and indifferent signal source activities. In this case, clustering of the signal sources in correlation and uncorrelation s...
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The paper presents an equivalent ellipsoid approach for interpretation and visualization of extended current distributions in biomagnetic inverse problems. The example of simulations performed with physical thorax phantom is also given.
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The process of identifying dipolar sources of bioelectric current in the gastrointestinal (GI) tract is of great importance to the future of medical diagnosis. Superconducting QUantum Interference Device (SQUID) magnetometers measure the minute magnetic fields associated with electrical control activity (ECA) from GI smooth muscle. The phenomenology of abnormal ECA current propagation can offer...
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Difficulty in determination of source brain activities for observed biomagnetic signals (magnetoencephalograms, MEGs) is known as the biomagnetic inverse problem. Moving Dipole Method [1] has been developed for solution of this problem. Two difficulties have been pointed out for this approach. The first problem is that the number of sources must be known before the analysis. However, it is diff...
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ژورنال
عنوان ژورنال: IEEJ Transactions on Fundamentals and Materials
سال: 1992
ISSN: 0385-4205,1347-5533
DOI: 10.1541/ieejfms1990.112.4_279