x射线扇束差相衬CT的线积分检索与重建

2015 Fifth International Conference on Instrumentation and Measurement, Computer, Communication and Control (IMCCC) Pub Date : 2015-09-01 DOI:10.1109/IMCCC.2015.289

J. Fu, Zhenzhong Liu

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引用次数: 0

摘要

本文报道了一种x射线扇束差分相衬计算机断层扫描(DPC-CT)重建技术。它包括两个步骤:从记录的DPC-CT投影中提取线积分和图像重建。第一步是利用傅里叶变换的导数性质并考虑到DPC-CT投影的微分性质的检索滤波器来执行。第二步采用经典的扇束吸收-对比度滤波反投影(FBP)算法。这项工作包括对该方法进行数值研究，并使用由三光栅干涉仪和微型聚焦x射线管源组成的x射线DPC-CT系统测量的数据集进行实验验证。结果表明，该方法的归一化均方根误差为0.2532，与直接FBP重构相比，重构精度提高了87%。

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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Line Integral Retrieval and Reconstruction for X-Ray Fan-Beam Differential Phase Contrast CT

A reconstruction technique for X-ray fan-beam differential phase-contrast computed tomography (DPC-CT) was reported in this paper. It consists of two steps which are line integral retrieval from the recorded DPC-CT projections and image reconstruction. The first step is performed using a retrieval filter which roots in the derivative property of Fourier transform and takes into account the differential nature of DPC-CT projections. The second step is implemented by the classical fan-beam absorption-contrast filtered back-projection (FBP) algorithms. This work comprises a numerical study of the method and its experimental verification using a dataset measured with an X-ray DPC-CT system consisted of a three-grating interferometer and a mini-focus x-ray tube source. The results indicate that normalized root square error of the proposed method is 0.2532 and the reconstruction accuracy is improved 87% compared with direct FBP reconstruction.

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来源期刊

2015 Fifth International Conference on Instrumentation and Measurement, Computer, Communication and Control (IMCCC)

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