|本期目录/Table of Contents|

显微CT三维分辨率测试方法研究进展(PDF)

《纳米技术与精密工程》[ISSN:1672-6030/CN:12-1351/O3]

期数:
2017年2期
页码:
127-134
栏目:
精密测量
出版日期:
2017-03-15

文章信息/Info

Title:
Research on Measurement Methods for 3D Spatial Resolution of Micro-CT
文章编号:
1672-6030(2017)02-0127-08
作者:
陈津平1 崔芳芳2 邹晶23 胡晓东23 吕寒玉2
1. 精密测试技术及仪器国家重点实验室(天津大学), 天津 300072;2. 天津大学精密仪器与光电子工程学院,天津 300072;3. 北京数学与信息交叉科学协同创新中心, 北京 100048
Author(s):
Chen Jinping1 Cui Fangfang2 Zou Jing23 Hu Xiaodong23 Lü Hanyu2
1. State Key Laboratory of Precision Measuring Technology and Instruments(Tianjin University), Tianjin 300072, China; 2. School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072,China; 3. Beijing Center for Mathematics and Information Interdisciplinary Sciences, Beijing 100048, China
关键词:
显微CT 空间分辨率 模体 调制传递函数 点扩散函数 线扩散函数 边缘扩散函数
Keywords:
micro-CT spatial resolution phantom modulation transfer function point spread function line spread function edge spread function
分类号:
TG115.28
DOI:
10.13494/j.npe.20150072
文献标识码:
A
摘要:
本文从模体观测法和调制传递函数法两个方面总结了显微CT三维空间分辨率的测试方法,重点介绍模体的形式结构和分辨率计算方法.三维分辨率模体通常分为条纹或圆孔模体,能够比较直观地估计分辨率的大概范围,但是受观测者的主观影响较大,且用于三维成像的显微CT的条纹模体成本较高.调制传递函数法模体加工相对简单,可以较客观全面地探究分辨率的空间变化规律,可分为点扩散函数法、线扩散函数法、边缘扩散函数法.本文讨论和比较各种分辨率测试方法的优缺点,然后提出一个新型的分辨率测试模体设计方案,并且通过一个简化模体验证了该方案的可行性.
Abstract:
This paper summarizes the measurement methods for the three-dimensional spatial resolution of micro-CT from the two perspectives of visual inspection and modulation transfer function (MTF), emphasizing on the structure of the phantom and the resolution calculation method. The three-dimensional resolution phantom usually takes the form of bar or point pattern. The visual inspection method estimates the approximate range of the resolution visually, but its result is subjective. Besides, the cost of the bar-pattern phantom used for micro-CT is very high. The MTF can be derived from point spread function (PSF), line spread function (LSF) or edge spread function (ESF). The phantom for the MTF method is relatively easily fabricated and can evaluate the spatial variation law of the resolution. This paper discusses and compares the advantages and disadvantages of different resolution measurement methods, and proposes a novel resolution measurement phantom design. Finally, the design is verified by a simplified phantom.

参考文献/References

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备注/Memo

备注/Memo:
收稿日期: 2015-09-21. 基金项目: 国家重大科学仪器设备开发专项资助项目(2011YQ030112). 作者简介: 陈津平(1973—),男,博士,副教授. 通讯作者: 邹晶,副研究员,jingzoutd@tju.edu.cn.
更新日期/Last Update: 2017-12-20