基于改进信赖域方法的EIT边界图像重构

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Abstract Aiming at the drawback of monotonic trust region method in image reconstruction of Electrical Impedance Tomography, a modified trust region method is proposed in this paper. In this method, a nonmonotonic method is used to insure that the goal-function does not have to at each iteration. The trust region subproblem is not solved again when the trial step is not accepted, while searching next iteration step according to the new adjustment step. The trust region radius is self-adaptive because of using the gradient and Hessian matrix information of current iteration step. Simulation results show that LM method and monotonic trust region method can not reconstruct the concave boundary and many boundaries exactly. Whereas, the modified trust region method can reconstruct them very good and has good quality of the reconstructed image and faster speed of image reconstruction. This new method presents a feasible and effective way to the research on image reconstruction for Electrical Impedance Tomagraphy.

Key words： keywords：Electrical impedance tomography boundary image reconstruction trust region method nonmonotonic self-adaptive

Received: 20 September 2012 Published: 12 December 2013

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TM154

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	Tan Chunxiao
	Xu Guizhi
	Su Guozhong
	Xu Yaoyuan

Cite this article:

Tan Chunxiao,Xu Guizhi,Su Guozhong等. Boundary Image Reconstruction Based on Modified Trust Region Method for Electrical Impedance Tomography[J]. Transactions of China Electrotechnical Society, 2013, 28(1增): 81-86.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I1增/81

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