22 September 1992 Overlay of neuromagnetic current-density images and morphological MR images
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Proceedings Volume 1808, Visualization in Biomedical Computing '92; (1992); doi: 10.1117/12.131120
Event: Visualization in Biomedical Computing, 1992, Chapel Hill, NC, United States
Abstract
Neuromagnetic imaging is a relatively new diagnostic tool for examination of electric activities in the nervous system. It is based on the noninvasive detection of extremely weak magnetic fields around the human body with superconducting quantum interference device (SQUID) detectors. `Equivalent current dipoles' and linear estimation reconstructions of current distributions both with spherical volume conductor models are used to localize the neural activity. For practical use in medical diagnosis a combination of the abstract neuromagnetic images with magnetic resonance (MR)- or computer tomography (CT)-images is required in order to match the functional activity with anatomy and morphology. The neuromagnetic images can be overlayed onto three-dimensional morphological images with spatially arbitrarily selectable slices. The matching of both imaging modalities is discussed. Based on the detection of auditory evoked magnetic fields, neuromagnetic images are reconstructed with linear estimation theory algorithms. The MR images are used as a-priori information of the volume conductor geometry and they allow an attachment of functional and morphological properties.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Manfred Fuchs, Hans-Aloys Wischmann, Olaf Doessel, "Overlay of neuromagnetic current-density images and morphological MR images", Proc. SPIE 1808, Visualization in Biomedical Computing '92, (22 September 1992); doi: 10.1117/12.131120; https://doi.org/10.1117/12.131120
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KEYWORDS
Magnetism

Head

Computed tomography

Magnetic resonance imaging

Optical spheres

Visualization

Biomedical optics

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