Title :
Detecting fractures in thin-wire structures
Author :
Lepelaars, E.S.A.M. ; Ooijen, Willem D R Van ; Tijhuis, Anton G. ; de Moi, B.A.J.M.
Author_Institution :
Fac. of Electr. Eng., Eindhoven Univ. of Technol., Netherlands
fDate :
31 Oct-3 Nov 1996
Abstract :
The possibility of detecting mechanical defects in certain types of heart valves by pulsed electromagnetic waves is studied by investigating a simplified model configuration via computational simulations. The model consists of a circular thin wire with an impedance load embedded in a homogeneous, dispersive dielectric, excited by a delta-gap voltage or an external dipole source. An integral equation for the total current along the wire is formulated and solved numerically. The results indicate that, for a suitable excitation, the presence of a defect may have a significant effect on the late-time decay rate of this current
Keywords :
biomechanics; biomedical equipment; cardiology; crack detection; electric impedance; physiological models; prosthetics; circular thin wire; computational simulation; delta-gap voltage; external dipole source; fractures detection; heart valves; homogeneous dispersive dielectric; impedance load; integral equation; late-time decay rate; magnetic dipole; mechanical defects; pulsed electromagnetic waves; simplified model configuration; thin-wire structures; total current; Computational modeling; Dielectrics; Dispersion; EMP radiation effects; Electromagnetic modeling; Electromagnetic scattering; Heart valves; Impedance; Voltage; Wire;
Conference_Titel :
Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-3811-1
DOI :
10.1109/IEMBS.1996.656895
