Ellipsoidal electrogastrographic forward modelling.

Irimia A, Bradshaw LA
Phys Med Biol. 2005 50 (18): 4429-44

PMID: 16148402 · DOI:10.1088/0031-9155/50/18/012

The theoretical and computational study of the electromagnetic forward and inverse problems in ellipsoidal geometry is important in electrogastrography because the geometry of the human stomach can be well approximated using this idealized body. Moreover, the anisotropies inherent to this organ can be highlighted by the characteristics of the electric potential associated with current dipoles in an ellipsoid. In this paper, we present a forward simulation for the stomach using an analytic expression of the gastric electric potential that employs a truncated expansion of ellipsoidal harmonics; we then demonstrate that an activation front of dipoles propagating along the body of an ellipsoid can simulate gastric electrical activity. In addition to the usefulness of our model, we also discuss its limitations and accuracy.

MeSH Terms (11)

Algorithms Anisotropy Computer Simulation Electrophysiology Humans Models, Anatomic Models, Biological Models, Statistical Models, Theoretical Radiography Stomach

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