Neural Network Blind Equalization Algorithm Applied in Medical CT Image Restoration

Author:

Sun Yunshan12,Zhang Liyi12,Zhang Jin3,Shi Lijuan1

Affiliation:

1. School of Information Engineering, Tianjin University of Commerce, Tianjin 300134, China

2. School of Electric Information Engineering, Tianjin University, Tianjin 300072, China

3. Shanxi Academy of Medical Sciences, Shanxi Dayi Hospital, Taiyuan 030024, China

Abstract

A new algorithm for iterative blind image restoration is presented in this paper. The method extends blind equalization found in the signal case to the image. A neural network blind equalization algorithm is derived and used in conjunction with Zigzag coding to restore the original image. As a result, the effect of PSF can be removed by using the proposed algorithm, which contributes to eliminate intersymbol interference (ISI). In order to obtain the estimation of the original image, what is proposed in this method is to optimize constant modulus blind equalization cost function applied to grayscale CT image by using conjugate gradient method. Analysis of convergence performance of the algorithm verifies the feasibility of this method theoretically; meanwhile, simulation results and performance evaluations of recent image quality metrics are provided to assess the effectiveness of the proposed method.

Funder

Tianjin College Science and Technology Development Foundation of China

Publisher

Hindawi Limited

Subject

General Engineering,General Mathematics

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