Heuristic reconstructions of neutron penumbral images
Heuristic reconstructions of neutron penumbral images
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DOI：
10.1063/1.1791334
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发表时间：
2004-10
影响因子：
1.6
通讯作者：
S. Nozaki;Yenwei Chen
中科院分区：
文献类型：
--
作者：
S. Nozaki;Yenwei Chen
半影成像是一种编码孔径成像技术，旨在用于高穿透辐射的成像。迄今为止，半影成像技术已成功应用于激光聚变实验中的中子成像。由于半影图像的重建是基于线性反卷积方法，例如逆滤波器和维纳滤波器，因此孔径的点扩散函数应该是空间不变的；它对半影图像中包含的噪声也很敏感。在本文中，我们提出了一种新的中子半影成像启发式重建方法，该方法可用于空变成像系统，并且对噪声的容忍度也很高。
Penumbral imaging is a technique of coded aperture imaging proposed for imaging of highly penetrating radiations. To date, the penumbral imaging technique has been successfully applied to neutron imaging in laser fusion experiments. Since the reconstruction of penumbral images is based on linear deconvolution methods, such as inverse filter and Wiener filer, the point spread function of apertures should be space invariant; it is also sensitive to the noise contained in penumbral images. In this article, we propose a new heuristic reconstruction method for neutron penumbral imaging, which can be used for a space-variant imaging system and is also very tolerant to the noise.