Phase-contrast X-ray imaging for nondestructive evaluation of materials

被引：0
|
作者：
Zoofan, B [1 ]
Kim, JY [1 ]
Rokhlin, SI [1 ]
Frankel, GS [1 ]
机构：
[1] Ohio State Univ, Nondestruct Evaluat Program, Edison Joining Technol Ctr, Columbus, OH 43221 USA
来源：
REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 23A AND 23B | 2004年 / 23卷
关键词：
D O I：
暂无
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Practical aspects of microfocal X-ray image enhancement utilizing phase-contrast effects are considered. Optimization of the experimental method to achieve phase contrast in the hard X-ray regime is described for application to nondestructive evaluation of materials. To achieve this we simulate the diffraction field in an object from a small finite X-ray source, and investigate effects of geometrical and material parameters on the X-ray phase-contrast image are investigated. Experimental phase-contrast images of porosity and cylindrical pit obtained with a 5 micron microfocal X-ray source are compared with those from computer simulation as a function of geometrical magnification and X-ray energy. The phase-contrast and absorption-contrast images are compared demonstrating quantitative enhancement of image quality. The phase-contrast X-ray imaging provides enhanced contrast, improved edge definition and X-ray phase information.
引用
收藏
页码：546 / 553
页数：8
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