Development of a dual-detector X-ray imaging system for phase retrieval study

被引:10
作者
Meng, Fanbo
Yan, Aimin
Zhou, Ge
Wu, Xizeng
Liu, Hong [1 ]
机构
[1] Univ Oklahoma, Ctr Bioengn, Norman, OK 73019 USA
[2] Univ Oklahoma, Sch Elect & Comp Engn, Norman, OK 73019 USA
[3] Univ Alabama, Dept Radiol, Birmingham, AL 35233 USA
基金
美国国家卫生研究院;
关键词
dual-detector; computed radiography; in-line X-ray phase imaging; phase retrieval;
D O I
10.1016/j.nimb.2006.11.075
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Based on a recently introduced phase X-ray imaging approach, a dual-detector prototype was developed for in-line X-ray phase imaging and phase retrieval utilizing a micro-focus X-ray source and two computed radiography (CR) cassette detectors. The system was built on a horizontal optical rail to facilitate manual adjustment of the positions of the X-ray source, the sample and the detectors. The novel design of the detector-1 is essential, it detects a portion of radiation to form an attenuation image; allows the rest of radiation to reach the detector-2 to form a phase contrast image, and the two images are used to retrieve a phase map. The two detectors are balanced for optimal phase-retrieval with reasonable radiation dose to the object to be imaged. The system was examined in terms of the linearity, the fractions of the X-ray photons detected by the two detectors, respectively and the imaging quality of phantoms. Preliminary results showed that the system is capable of phase X-ray imaging and quantitative phase retrieval. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:300 / 306
页数:7
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