Polynomial curve fitting method for refraction-angle extraction in diffraction enhanced imaging

被引：9

作者：

Chen Zhi-Qiang ^{[1
,2
]}

Ding Fei ^{[1
,2
]}

Huang Zhi-Feng ^{[1
,2
]}

Zhang Li ^{[1
,2
]}

Yin Hong-Xia ^{[3
]}

Wang Zhen-Chang ^{[3
]}

Zhu Pei-Ping ^{[4
]}

机构：

[1] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Key Lab Particle & Radiat Imaging, Minist Educ, Beijing 100084, Peoples R China

[3] Capital Med Univ, Med Imaging Ctr, Beijing Tongren Hosp, Beijing 100730, Peoples R China

[4] Chinese Acad Sci, Beijing Synchrotron Radiat Facil, Inst High Energy Phys, Beijing 100049, Peoples R China

来源：

CHINESE PHYSICS C | 2009年 / 33卷 / 11期

基金：

中国国家自然科学基金;

关键词：

diffraction enhanced imaging; synchrotron radiation; polynomial curve fitting; PHASE INFORMATION; CONTRAST; ABSORPTION; ANALYZER;

D O I：

10.1088/1674-1137/33/11/008

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

X-ray diffraction enhanced imaging (DEI) is applied to inspect internal structures of weakly absorbing low-Z sample. How to extract phase information from raw images measured in different positions of rocking curve is the key problem of DEL In this paper, we present an effective extraction method called polynomial curve fitting method, in order to extract accurate information angular in a fast speed. It is compared with the existing methods such as multiple-images statistical method and Gaussian curve fitting method. The experiments results on a plastic cylinder and a black ant at the Beijing Synchrotron Radiation Facility prove that the polynomial curve fitting method can obtain most approximate refraction-angle values and its computation speed is 10 times faster than the Gaussian curve fitting method.

引用

页码：969 / 974

页数：6

共 21 条

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