一种探测器偏置重建算法在工业CT检测中的应用研究
详细信息 查看官网全文
- 英文论文题名：An application Study of detector offset reconstruction algorithm for industrial CT test
- 论文作者：王腾钫 ; 陈浩 ; 陈云斌 ; 胡栋材
- 英文论文作者：WANG Tengfang ; CHEN Hao ; CHEN Yunbin ; HU Dongcai ; Institute of Applied Electronics Of CAEP
- 年：2016
- 作者机构：中国工程物理研究院应用电子学研究所;
- 论文关键词：工业CT ; 医疗CT ; 探测器偏置 ; 短扫描 ; FBP重建 ; 扫描视野
- 英文论文关键词：industrial CT ; medical CT ; detector offset ; short scan ; FBP reconstruction ; FOV
- 会议召开时间：2016-09-20
- 会议录名称：2016年全国射线数字成像与CT新技术研讨会论文集
- 语种：中文
- 分类号：TP391.41
- 学会代码：EGTA
- 会议名称：2016年全国射线数字成像与CT新技术研讨会
- 会议地点：中国四川成都
- 主办单位：中国体视学学会CT理论与应用分会
- 学会名称：中国体视学学会
- 页数：1
- 文件大小：42k
- 原文格式：O
- 会议级别：全国
摘要
工业CT与医疗CT的一个重要区别在于检测对象其大小是不确定的,而一套CT系统的所能检测物体的大小是由探测器的大小确定的,而最大限度的利用已有探测器的成像面积是非常有意义的。本文采用一种将探测器横向偏移一定距离来获得更大的扫描视野的方法,推导相应的重建算法。该算法首先使用Parker类型函数对采集到的投影数据中的冗余部分进行加权,然后采用扇束滤波反投影重建算法得到断层图像。实验分析表明,这种方法可有效扩大CT系统的扫描视野并保证重建结果的有效性和实用性。
An important difference between industrial CT and medical CT is the size of the object who wants to detect is uncertain,The FOV of a CT system is determined by the size of the detector,And to maximize the use of imaging area of the detector is meaningful.This paper will use method to achieve bigger FOV by lateral offset the detector a distance,and derivation appropriate reconstruction algorithm.In this method,use Parker type of function weighted redundant portion of the collected projection data first.Then using fan-beam filtered back-projection reconstruction algorithm to obtain a tomographic image.Experimental results show that this method can effectively expand the FOV of a CT system and ensure the effectiveness and usefulness of the reconstruction results.
An important difference between industrial CT and medical CT is the size of the object who wants to detect is uncertain,The FOV of a CT system is determined by the size of the detector,And to maximize the use of imaging area of the detector is meaningful.This paper will use method to achieve bigger FOV by lateral offset the detector a distance,and derivation appropriate reconstruction algorithm.In this method,use Parker type of function weighted redundant portion of the collected projection data first.Then using fan-beam filtered back-projection reconstruction algorithm to obtain a tomographic image.Experimental results show that this method can effectively expand the FOV of a CT system and ensure the effectiveness and usefulness of the reconstruction results.
引文