Advantages of intermediate X-ray energies in Zernike phase contrast X-ray microscopy
Wang ZL(王志立); Wang, ZL; Gao, K; Chen, J; Hong, YL; Ge, X; Wang, DJ; Pan, ZY; Zhu, PP; Yun, WB; Jacobsen, C; Wu, ZY;; Hong YL(洪友丽); Zhu PP(朱佩平); Wu ZY(吴自玉)
刊名BIOTECHNOLOGY ADVANCES
2013
卷号31期号:SI3页码:387-392
关键词X-ray microscopy Zernike phase contrast Intermediate energy Tomography Radiation dose Depth-of-focus
学科分类Biotechnology & Applied Microbiology
DOI10.1016/j.biotechadv.2012.04.001
英文摘要Understanding the hierarchical organizations of molecules and organelles within the interior of large eukaryotic cells is a challenge of fundamental interest in cell biology. Light microscopy is a powerful tool for observations of the dynamics of live cells, its resolution attainable is limited and insufficient. While electron microscopy can produce images with astonishing resolution and clarity of ultra-thin (<1 mu m thick) sections of biological specimens, many questions involve the three-dimensional organization of a cell or the interconnectivity of cells. X-ray microscopy offers superior imaging resolution compared to light microscopy, and unique capability of nondestructive three-dimensional imaging of hydrated unstained biological cells, complementary to existing light and electron microscopy. Until now, X-ray microscopes operating in the "water window" energy range between carbon and oxygen k-shell absorption edges have produced outstanding 3D images of cryo-preserved cells. The relatively low X-ray energy (<540 eV) of the water window imposes two important limitations: limited penetration (<10 mu m) not suitable for imaging larger cells or tissues, and small depth of focus (DoF) for high resolution 3D imaging (e.g., similar to 1 mu m DoF for 20 nm resolution). An X-ray microscope operating at intermediate energy around 2.5 key using Zernike phase contrast can overcome the above limitations and reduces radiation dose to the specimen. Using a hydrated model cell with an average chemical composition reported in literature, we calculated the image contrast and the radiation dose for absorption and Zernike phase contrast, respectively. The results show that an X-ray microscope operating at similar to 2.5 key using Zernike phase contrast offers substantial advantages in terms of specimen size, radiation dose and depth-of-focus. (C) 2012 Elsevier Inc. All rights reserved.
收录类别SCI
WOS记录号WOS:000317441900005
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被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223967
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_多学科研究中心
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Wang ZL,Wang, ZL,Gao, K,et al. Advantages of intermediate X-ray energies in Zernike phase contrast X-ray microscopy[J]. BIOTECHNOLOGY ADVANCES,2013,31(SI3):387-392.
APA 王志立.,Wang, ZL.,Gao, K.,Chen, J.,Hong, YL.,...&吴自玉.(2013).Advantages of intermediate X-ray energies in Zernike phase contrast X-ray microscopy.BIOTECHNOLOGY ADVANCES,31(SI3),387-392.
MLA 王志立,et al."Advantages of intermediate X-ray energies in Zernike phase contrast X-ray microscopy".BIOTECHNOLOGY ADVANCES 31.SI3(2013):387-392.
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