[1] Hou Haoming, Liu Zhenhua, Liu Yajie et al.. Application of digital subtraction angiography to elderly patients with vertebrobasilar arterial insufficiency［J］. Practical Geriatrics, 2006, 20(5): 338～340

[2] K. Han, K.Yu-Zhang. Transmission electron microscopy strudy of metallic multilayers［J］. Scripta. Mater., 2004, 50(6): 781～786

[3] Weijun Tong, Changyou Gao. Multilayer microcapsules with tailored structures for bio-related applications［J］. J. Mater. Chem., 2008, 18(32): 3799～3812

[4] Yu Mingchuan, Fei Shengmin, Li Jing. Different post-processing techniques in evaluating stenosis degree of vessels in static model of coronary artery stenosis［J］. Chin. J. Med. Imaging Technol., 2010, 26(9): 1779～1782

[5] Gu Xiang, Liu Xiaoxia, Sun Jianqi et al.. Preliminary study on application of synchrotron radiation imaging to tumor angiogenesis［J］. Nucl. Techniq., 2009, 32(7): 487～491

[6] A. Pogany, D. Gao, S. W. Wilkins. Contrast and resolution in imaging with a microfocus X-ray source［J］. Rev. Sci. Instrum., 1997, 68(7): 2774～2782

[7] T. Q. Xiao, A. Bergamaschi, D. Dreossi et al.. Effect of spatial coherence on application of in-line phase contrast imaging to synchrotron radiation mammography［J］. Nucl. Instrum. Meth. A, 2005, 548(1-2): 155～162

[8] T. Takeda, A. Momose, J. Wu et al.. Vessel imaging by interferometric phase-contrast X-ray technique［J］. Circulation, 2002, 105(14): 1708～1712

[9] Sun Yi, Zhu Peiping, Yu Jian et al.. Absorption, refraction and extinction contrast computerized tomography of X-ray diffraction enhanced imaging method［J］. Acta Optica Sinica, 2007, 27(4): 749～754

[10] Liu Lixiang, Du Guohao, Hu Wen et al.. Effect of some factors on imaging quality of X-ray in-line outline imaging［J］. Acta Physica Sinica, 2007, 56(8): 4556～4564

[11] Li Jing, Liu Wenjie, Zhu Peiping et al.. Reconstruction algorithm of fan-beam helical X-ray computer tomography based on grating imaging［J］. Acta Optica Sinica, 2010, 30(2): 421～427

[12] Xue Yanling, Xiao Tiqiao, Du Guohao et al.. Microscopic identification of panax quinquefolium and panax ginseng by X-ray phase contrast imaging［J］. Acta Optica Sinica, 2008, 28(9): 1828～1832

[13] P. Cloetens, M. Pateyron-Salome, J. Y. Buffiere et al.. Observation of microstructure and damage in materials by phase sensitive radiography and tomography［J］. J. Appl. Phys., 1997, 81(9): 5878～5886

[14] G. B. Kim, Y. J. Yoon, T. J. Shin et al.. X-ray imaging of various biological samples using a phase-contrast hard X-ray microscope［J］. Microsc. Res. Techniq., 2008, 71(9): 639～643

[15] Chen Rongchang, Xie Honglan, Du Guohao et al.. Experimental investigation on X-ray micro-computed tomography by phase retrieval with Born approximation［J］. Acta Optica Sinica, 2009, 30(4): 1106～1111

[16] Huang Lixin, Yao Xin, Cai Dongmei et al.. A high accuracy and fast iterative algorithm for phase retrieval［J］. Chinese J. Lasers, 2010, 37(5): 1218～1221

[17] Xue Bindang, Zheng Shiling, Jiang Zhiguo. Phase retrieval using transport of intensity equation solved by full multigrid method［J］. Acta Optica Sinica, 2009, 29(6): 1514～1518

[18] M. Langer, P. Clotens, J. P. Guigay et al.. Quantitative comparison of direct phase retrieval algorithms in in-line phase tomography［J］. Med. Phys., 2008, 35(10): 4556～4566

[19] J. P. Guigay, M. Langer, R. Boistel et al.. Mixed transfer function and transport of intensity approach for phase retrieval in the Fresnel region［J］. Opt. Lett., 2007, 32(12): 1617～1619

[20] M. Born, E. Wolf. Principles of Optics: Electromagnetic Theory of Propagation, Interference and Diffraction of Light ［M］. Cambridge: Cambridge University Press, 1999

[21] Shi Shaomeng, Chen Rongchang, Xue Yanling et al.. X-ray microscopic imaging of low Z materials wrapped by strongly absorbing medium［J］. Acta Physica Sinica, 2008, 57(10): 6319～6328

[22] A. N. Tikhonov, V. Y. Arsenin. Solutions of Ill-Posed Problems ［M］. John Wiley & Sons, 1977

[23] T. E. Gureyev, T. J. Davis, A. Pogany et al.. Optical phase retrieval by use of first Born- and Rytov-type approximations ［J］. Appl. Opt., 2004, 43(12): 2418～2430

[24] B. L. Henke, E. M. Cullikson, J. C. Davis. X-ray interactions: photo absorption, scattering, transmission, and reflection at E=50～30,000 eV, Z=1～92[J]. At. Data Nucl. Data Tables, 1993, 54(2): 181～343

[25] Guo Rongyi, Ma Hongjuan, Xue Yanling et al.. K-Edge digital subtraction X-ray imaging for observation of Cu2+ adsorption in polymer particles［J］. Acta Optica Sinica, 2010, 30(10): 2898～2903