Three-dimensional uniform grid modeling of electrical defibrillation on a data parallel computer.
Finite element modeling has played an increasingly important role in the study of defibrillation. In order to model well the complex anatomical details, a large number of elements are required in the finite element grid, leading to a large set of equations that often cannot be solved effectively with the computational power of conventional computers. In this paper, we describe the use of a data parallel computer to provide the memory and reduction in solution time for solving these large finite element problems. Using a uniform grid and a nodal assembly technique, the discretized problem domain can be mapped efficiently to the parallel computer, allowing the solution of problems with over two million unknowns. The finite element algorithm for a three-dimensional inhomogeneous anisotropic body is described together with its parallel implementation. Test results for a canine torso model constructed from CT images are also presented.
Gao
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Department of Electrical & Computer Engineering, New Mexico State University, Las Cruces 88003, USA.
Nadeem
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Deale
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Lerman
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Ng
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D000465:Algorithms; D000818:Animals; D016880:Anisotropy; D016287:Computer Peripherals; D004285:Dogs; D004553:Electric Conductivity; D004554:Electric Countershock; D009716:Numerical Analysis, Computer-Assisted; D013902:Radiography, Thoracic; D012815:Signal Processing, Computer-Assisted; D013909:Thorax / Q000502:physiology*; D014057:Tomography, X-Ray Computed