Feasibility of three-dimensional density tomography using dozens of muon radiographies and filtered back projection for volcanos

Feasibility of three-dimensional density tomography using dozens of muon radiographies and filtered back projection for volcanos
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使用数十μ子射线照相和火山滤波反投影进行三维密度断层扫描的可行性

DOI：
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发表时间：
2018
期刊：
Geoscientific Instrumentation, Methods and Data Systems
影响因子：
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通讯作者：
S. Miyamoto
S. Miyamoto
中科院分区：
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文献类型：
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作者：
Shogo Nagahara;S. Miyamoto

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抽象的。这项研究是首次尝试应用滤波反投影法 (FBP)通过以下方式重建三维(3D)体积密度图像 宇宙射线介子。我们还模拟了三维重建图像 用FBP方法拍摄了一座火山的数十张Muon射线照片 评估了它的实用性。FBP方法在X射线和CT图像重建中得到了广泛的应用，但还没有 已被应用于介子射线照相领域。使用FBP的优点之一是 方法而不是普通的反转方法，是它不需要 初始模型，而普通的反演分析需要初始模型。我们还通过使用山区地形数据添加了新的近似因子 在现有公式中成功地减少系统重建 错误。从火山的角度来看，激光雷达通常用于测量和 分析山体地形。我们测试了一个模型的性能和适用性，一个 位于日本静冈的单基因球果。结果，它就是 揭示了原始和重建之间的密度差异 图像取决于观测点的数量和偶然误差 由介子引起的统计依赖于总有效的乘积 区域和曝光期。结合以上所有内容，我们确定了如何评估观察结果 使用数十张Muon射线照片计划火山爆发。
Abstract. This study is the first trial to apply the method of filtered back projection (FBP) to reconstruct three-dimensional (3-D) bulk density images via cosmic-ray muons. We also simulated three-dimensional reconstruction image with dozens of muon radiographies for a volcano using the FBP method and evaluated its practicality. The FBP method is widely used in X-ray and CT image reconstruction but has not been used in the field of muon radiography. One of the merits of using the FBP method instead of the ordinary inversion method is that it does not require an initial model, while ordinary inversion analysis needs an initial model. We also added new approximation factors by using data on mountain topography in existing formulas to successfully reduce systematic reconstruction errors. From a volcanic perspective, lidar is commonly used to measure and analyze mountain topography. We tested the performance and applicability to a model of Omuroyama, a monogenetic scoria cone located in Shizuoka, Japan. As a result, it was revealed that the density difference between the original and reconstructed images depended on the number of observation points and the accidental error caused by muon statistics depended on the multiplication of total effective area and exposure period. Combining all of the above, we established how to evaluate an observation plan for volcanos using dozens of muon radiographies.