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A uniformly redundant imaging array of penumbral apertures coupled with a heuristic reconstruction for hard x-ray and neutron imaging

机译:半影孔的均匀冗余成像阵列以及用于硬X射线和中子成像的启发式重建

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摘要

A coded imaging and decoding (image reconstruction) scheme was developed for diagnosing a hot and dense region emitting hard x-rays and neutrons in laser-fusion plasmas. Because the imager was a uniformly redundant array of penumbral aperture (URPA) arranged in an M-matrix, URPA leads to N times (N: the total number of apertures) enhancement of signal intensity in comparison with a single penumbral aperture. A recorded penumbral image was reconstructed by a computer-based heuristic method to reduce artifacts caused by noises contained in a penumbral image. Applicability of this technique was investigated by imaging x-rays emitted from laser-produced plasmas, demonstrating a spatial resolution of 16 μm. Under the present conditions, the spatial resolution was determined dominantly by a detector resolution (10.5 μm) and a signal-to-noise ratio of the obtained penumbral image. © 2010 American Institute of Physics Article Outline INTRODUCTION HEURISTIC METHOD OF PENUMBRAL IMAGE RECONSTRUCTION PROOF-OF-PRINCIPLE EXPERIMENT OF URPA METHOD HEURISTIC RECONSTRUCTION OF PENUMBRAL IMAGE OBTAINED WITH URPA SUMMARY
机译:开发了一种编码成像和解码(图像重建)方案,用于诊断在激光融合等离子体中发射硬X射线和中子的热密集区域。因为成像器是布置在M矩阵中的半影孔(URPA)的均匀冗余阵列,所以与单个半影孔相比,URPA导致信号强度增强了N倍(N:小孔总数)。通过基于计算机的启发式方法重建记录的半影图像,以减少由半影图像中包含的噪声引起的伪影。通过对从激光产生的等离子体发射的X射线进行成像研究了该技术的适用性,证明其空间分辨率为16μm。在当前条件下,空间分辨率主要由探测器分辨率(10.5μm)和获得的半影图像的信噪比确定。 ©2010美国物理研究所文章大纲介绍启发式方法重建数字图像URPA的原理证明方法启发式重建方法获得的URPA摘要

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