Evaluation on correction factor for in-line X-ray phase contrast Computed Tomography

Jin MingLi; Huang Zhifeng; Zhang Li; Yin Hongxia; Liu Yunfu; Wang Zhenchang; Xiao Tiqiao

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Evaluation on correction factor for in-line X-ray phase contrast Computed Tomography

Jin MingLi 1,Huang Zhifeng 1 *,Zhang Li 2,Yin Hongxia 3,Liu Yunfu 4,Wang Zhenchang 4,Xiao Tiqiao 4

1.The Department of Engineering Physics, Tsinghua University, Beijing, China,100084；Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education

2.The Department of Engineering Physics, Tsinghua University

3. Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education

4.Medical Imaging Center, Beijing Tongren Hospital, Capital Medical University

*Correspondence author

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Funding: National Natural Science Foundation of China （No.NNSFC) grants 10905031, 10875066 and 30770618）

Opened online:14 March 2011

Accepted by: none

Citation: Jin MingLi ,Huang Zhifeng ,Zhang Li .Evaluation on correction factor for in-line X-ray phase contrast Computed Tomography[OL]. [14 March 2011] http://en.paper.edu.cn/en_releasepaper/content/4413752

X-ray in-line phase contrast computed tomography (CT) is an effective nondestructive tool, providing 3D distribution of the refractive index of weakly absorbing low-Z object with high resolution and image contrast, especially with high-brilliance third-generation synchrotron radiation sources. Modified Bronnikov's algorithm (MBA), one of the in-line phase contrast CT reconstruction algorithms, can reconstruct the refractive index distribution of a pure phase object with a single computed tomographic data set. The key idea of the MBA is to use a correction factor in the filter function to stabilize the behavior at low frequencies. In this paper, we evaluate the influences of the correction factor to the final reconstruction results of the absorption-phase-mixed objects with analytical simulation and actual experiments. The limitations of the MBA are discussed finally..

Keywords:In-line phase contrast computed tomography;phase retrieval;Modified Bronnikov's Algorithm

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