工业CT大视野扫描的统一形式及其重建算法

A general form of large FOV scan model and reconstruction algorithm for industrial CT

陈云斌 ¹李寿涛 ¹刘清华 ¹李敬 ¹王远¹

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作者信息

1. 中国工程物理研究院应用电子学研究所,绵阳 621900;国家X射线数字化成像仪器中心,绵阳 621000;先进激光与高功率微波全国重点实验室,绵阳 621900
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摘要

工业CT大视野扫描模式包括探测器偏置扫描和转台偏置扫描.实际应用中,大视野扫描通常同时存在探测器偏置和转台偏置.针对上述情况,本文提出了大视野扫描的统一形式,即探测器、转台联合偏置扫描.通过分析投影地址的重复采样次数,本文提出基于Parker函数加权的联合偏置重建算法,并对一个考古文物进行大视野扫描实验进行验证.实验结果表明,本文提出的大视野扫描统一模型及其重建算法切实可行,具有一定的工程实用价值.

Abstract

The scan model for enlarging the FOV of an industrial CT include detector displaced scanning and rotation center displaced scanning.In practice,it is common that both the detector center and rotation center are shifted in a large FOV scan model.In this work,aunified form of large FOV scan model is pro-posed for the scan with both the detector center and rotation center shifted.A Parker weighting based re-construction algorithm is also formulated by analyzing the repeated sampling of projections.Experimental result shows that the unified form of large FOV scan model and the proposed reconstruction algorithm is feasible and valuable in practical engineering.

关键词

工业CT/探测器偏置扫描/转台偏置扫描

Key words

industrial CT/detector displaced scanning/rotation center displaced scanning

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出版年

2024

中国体视学与图像分析

中国体视学学会

中国体视学与图像分析

影响因子：0.293

ISSN：1007-1482

参考文献量4

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