Title :
The surface Laplacian of the potential: theory and application
Author :
Oostendorp, Thom F. ; Van Oosterom, Adriaan
Author_Institution :
Lab. of Med. Phys. & Biophys., Nijmegen Univ., Netherlands
fDate :
4/1/1996 12:00:00 AM
Abstract :
The use of the surface Laplacian of the potential (L s) in bioelectricity is discussed. Different estimates of L s, in particular the field measured by coaxial electrodes, are compared to that of the true Laplacian. A method to compute L s on the surface of an inhomogeneous volume conductor of arbitrary shape resulting from assumed electrical sources is introduced. In two applications the sensitivity of the body surface Laplacian is compared to that of body surface potentials. This comparison is carried out for dipolar sources within the human brain as well as for distributed sources within the heart.
Keywords :
Laplace equations; bioelectric potentials; electrocardiography; electroencephalography; surface potential; arbitrary shape; assumed electrical sources; bioelectricity; coaxial electrodes; distributed sources; heart; human brain; inhomogeneous volume conductor; potential surface Laplacian; Bioelectric phenomena; Coaxial components; Conductors; Electric potential; Electrodes; Humans; Laplace equations; Nonuniform electric fields; Particle measurements; Shape; Body Surface Potential Mapping; Electrocardiography; Electrodes; Electroencephalography; Humans; Models, Cardiovascular; Models, Neurological; Sensitivity and Specificity;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
