IEEE Transactions on Instrumentation and Measurement · 2008 · 24 citations · 12 references
ComputingBiomedical EngineeringElectrical EngineeringComputational ElectromagneticsFinite Element AnalysisFinite Element MethodsFinite Difference MethodsFinite Element DiscretizationFinite Element FormulationImage ReconstructionIterative SolversNumerical AlgorithmsCapacitive Sensor ModelingForward Imaging ModelIterative Image ReconstructionIterative ReconstructionPermittivitySensitivitySensor TechnologyTomographic Reconstruction
An electrical-capacitance-tomography sensor consists of a set of measurement electrodes. It is difficult to calculate the capacitance for a given sensor structure and given permittivity distribution, which is called solving the forward problem, theoretically. Therefore, finite-element methods (FEM) and finite-difference methods are commonly used to solve the forward problem and to generate a sensitivity matrix for image reconstruction. This paper presents a new approach to solving the forward problem based on a capacitor-mesh model. It has been used for iterative image reconstruction using an updated sensitivity matrix according to an estimated image. In this paper, some simulation results are presented and compared with the results obtained using an FEM software package from Ansoft Company, showing that the new approach is promising.
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Cheng Xie, S.M. Huang, M.S. Beck et al. · IEE Proceedings G Circuits Devices and Systems · 1992 · 503 citations · Full text
Engineering, Biomedical Engineering, Electrical Engineering +17