Multi-material Reconstruction Method Based On Deep Prior of Spectral Computed Tomography

Xiao-Kun Yu, Ailong Cai, Lei Li, Bin Yan
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Abstract

Spectral computed tomography (Spectral CT) has attracted more and more attention because of its ability of material discrimination. However, as the number of materials increases, it becomes more difficult to decompose the material according to the polychromatic projection. This paper presents a direct multi-material reconstruction method, in which a deep convolutional neural network (CNN)-based prior is incorporated into the optimization model. The efficient iterative algorithm is designed under the framework of the alternating direction method of multipliers (ADMM). The numerical experiments further validate the superiority of the proposed method in multi-material reconstruction and noise suppression.
基于光谱计算机断层扫描深度先验的多材料重建方法
光谱计算机断层扫描(Spectral computer tomography,简称Spectral CT)因其对材料的识别能力而受到越来越多的关注。然而,随着材料数量的增加,根据多色投影对材料进行分解变得更加困难。本文提出了一种直接多材料重构方法,该方法将基于深度卷积神经网络(CNN)的先验算法引入到优化模型中。在乘法器交替方向法(ADMM)框架下设计了高效迭代算法。数值实验进一步验证了该方法在多材料重构和噪声抑制方面的优越性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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