Biomag 96

Volume 1/Volume 2 Proceedings of the Tenth International Conference on Biomagnetism
2000. Auflage 2000
ISBN: 978-0-387-98915-0
Verlag: Springer

Buch, Englisch, 1185 Seiten, Gewicht: 2020 g

A modified Linear Estimation Approach was performed to reconstruct current sources within the heart. Based on MRI data sets the Boundary Element Method was used to create tailored multicompartment models of the human thorax which were used to solve the forward problem of magnetocardiography. The ability of the proposed method was demonstrated for the localization of a single current dipole as an example of a focal source. By means of introducing small shiftings to all reconstruction dipoles during linear estimation solution as well as performing a successive focussing strategy ignoring places without significant electrical activity the method could easily be extended to the reconstruction of real 3D sources. Based on a special minimum-norm solution the source volume can be estimated applying a finite element approximation using cube elements. The size of an extended current source can be estimated by superimposing the reconstructed dipoles to an equivalent dipole and comparing the corresponding volume with the sphere which would be related to the equivalent dipole. The deviation of these volumes can be taken as a criterion for non-dipolarity of sources.

Zielgruppe

Research

Autoren/Hrsg.

Aine, Cheryl J

Okada, Yoshio

Stroink, Gerhard

Swithenby, Stephen J

Wood, Charles C

Fachgebiete

• Naturwissenschaften Biowissenschaften Angewandte Biologie Biophysik
• Naturwissenschaften Physik Physik Allgemein
• Medizin | Veterinärmedizin Medizin | Public Health | Pharmazie | Zahnmedizin Medizinische Fachgebiete Bildgebende Verfahren, Nuklearmedizin, Strahlentherapie Magnetresonanztomographie, Computertomographie (MRT, CT)
• Medizin | Veterinärmedizin Medizin | Public Health | Pharmazie | Zahnmedizin Klinische und Innere Medizin Innere Medizin
• Naturwissenschaften Physik Angewandte Physik Biophysik

Inhaltsverzeichnis

Volume 1: Instrumentation; Forward and Inverse Problems; Magnetocardiography.-
Volume 2: Gastro-Intestinal,Susceptometry, and Other Measures; Basic and Clinical Magnetoencephalography; Multimodality Comparisons and Integration.