The image reconstruction for the electrical impedance tomography (EIT) was implemented using the distributed computing model based on Winsock. It allows standard TCP/IP-based applications to be written for the Microsoft Windows environment. The distributed computing model was built on a cluster of local area networking PCs. It was also integrated into our EIT system. The distributed computing model consists a client interface and a server interface. In addition, the auto-scaling mechanism was introduced to solve the loading unbalanced problem. The workload was redistributed to each server based upon their previous execution. Three algorithms related to the image reconstruction are implemented using this distributed computing model with satisfactory performance. In the finite element method based forward solver, which includes 992 elements and 513 nodes, the speedup was increased to about 3.44 times and the execution time was decreased from 49.52 seconds for one server to 14.41 seconds with the configuration of seven servers. With the same configuration for the filtered backprojection algorithm, the reconstructed image consisting of 101*101 pixels mapped into 992 triangular meshes, the speedup was increased to about 4.77 times and the execution time was decreased from 16.74 seconds to 3.51 seconds. Similarly, in the iterative scheme of Newton-Raphson method, the execution time of 10 iterations was decreased from 534.09 seconds to 298.21 seconds.
|Number of pages||8|
|Journal||Biomedical Engineering - Applications, Basis and Communications|
|Publication status||Published - 1998 Oct 25|
All Science Journal Classification (ASJC) codes