无网格x射线成像中不完整数据散射核测定的物理基础

IF 0.4 Q4 PHYSICS, NUCLEAR

Nuclear Physics and Atomic Energy Pub Date : 2021-06-25 DOI:10.15407/jnpae2021.02.189

A. Danyk, O. Sudakov

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引用次数: 0

摘要

介绍了一种基于不完全模拟或测量数据确定x射线散射核形状的数学模型，并用数学模型进行了测试。该模型最初用于无抗散射网格的低剂量x射线成像。该模型能较好地拟合不同组织中不同类型的对称和不对称散射核，具有较好的实际应用价值。核不对称主要是由于物体在不同组织边界附近的辐照引起的。该模型通过提议的“部门”成员描述了各种不对称核。将该模型应用于散射补偿过程中，对于“宽”散射核，补偿误差可降低50%。

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Physical bases for determination of scattering kernels from incomplete data in grid-less X-ray imaging

A mathematical model for the determination of X-ray scattering kernels’ shapes based on incomplete simulation or measurement data was introduced and tested using a mathematical phantom. The model is originally intended for low-dose X-ray imaging without anti-scatter grids. The proposed model fits different kinds of symmetrical and asymmetrical scattering kernels in different tissues well enough for practical applications. Kernels asymmetry is mostly caused by irradiation of the object near the boundaries of different tissues. The model describes a variety of asymmetrical kernels by proposed “sectoral” members. Application of the proposed model in scattering compensation procedure reduces resulting error up to 50 % for “wide” scattering kernels.

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来源期刊

Nuclear Physics and Atomic Energy PHYSICS, NUCLEAR-

CiteScore

0.70

自引率

33.30%

发文量

审稿时长

19 weeks

期刊介绍： The journal Nuclear Physics and Atomic Energy presents the publications on Nuclear Physics, Atomic Energy, Radiation Physics, Radioecology, Engineering and Methods of Experiment. The journal includes peer-reviewed articles which are completed works containing new results of theoretical and experimental researches and are of interest for the scientists, postgraduate students, engineers and for the senior students.