Refractive Contrast in X-Ray Diffraction Enhanced Imaging

JIANG Xiao-Ming; LI Gang; CHEN Zhi-Hua; TANG Jin-Tian

Chinese Physics C> 2004, Vol. 28> Issue(12) : 1282-1290

Refractive Contrast in X-Ray Diffraction Enhanced Imaging

Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China2 China-Japan Friendship Institute of Clinical Medical Sciences,Beijing 100029,China

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Abstract：
The deflecting angles of X-ray beams caused by refractive objects are deduced according to the refractive process at interface of different refractive indexes. The spacial resolution and the electron density resolution of the diffraction enhanced imaging (DEI) method are discussed relating to the experimental parameters. Appearances of refractive contrast in the DEI method are discussed and experimentally confirmed. Vivid images of blood vessels in human liver sample are obtained by DEI technique using X-rays with different energies. The contributions of the refractive contrast in improving the image contrast are easily understood.

References

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.Attwood DT. Soft X-Rays and Extreme Ultraviolet Radiat ion: Principles and Applications ( Cambridge Univ. Press, Cambridge, 1999)2. Henke B, Gullikson E, Davis J At . Data Nucl. Data Tab. , 1993, 54:181-3423. Fitzgerald R. PhysicsToday Online, 2000, July4. Momose A et al . Nature Medicine, 1996, 2: 473; Takeda T et al. Radiology, 2000, 214: 2985. Chapman D et al. Phys. Med. Biol. , 1997, 42: 2015 -20256. Bravin A. J. Phys. D: Appl. Phys. , 2003, 36: A24-A297. Snigirev A et al . Rev. Sci. Instrum. , 1995, 66: 54868. Wilkins S W et al . Nature, 1996, 384: 3359. Lewis R A et al. Synchrotron Radiation News, 1999, 12(1) : 7-1410. Tanner B K. X-ray Diffraction Topograhpy.Oxford: Pergamon Press, 197611. HE Qi-Zhi. Electrodynamics. Beijing:Higher Education Press, 1985, 162(in Chinese)(何启智主编.电动力学.北京:高等教育出版社,1985,162) 12. Davis T J et al . Nature, 1995, 373: 59513. JIANG Jian-Hau et al. Nucl. Instr. and Meth. in Phys. Res. , 1993,A336: 354-360

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JIANG Xiao-Ming, LI Gang, CHEN Zhi-Hua and TANG Jin-Tian. Refractive Contrast in X-Ray Diffraction Enhanced Imaging[J]. Chinese Physics C, 2004, 28(12): 1282-1290.

JIANG Xiao-Ming, LI Gang, CHEN Zhi-Hua and TANG Jin-Tian. Refractive Contrast in X-Ray Diffraction Enhanced Imaging[J]. Chinese Physics C, 2004, 28(12): 1282-1290. shu

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Received: 2004-06-23
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Refractive Contrast in X-Ray Diffraction Enhanced Imaging

Corresponding author: JIANG Xiao-Ming,

Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China2 China-Japan Friendship Institute of Clinical Medical Sciences,Beijing 100029,China

Received Date: 2004-06-23
Accepted Date: 1900-01-01
Available Online: 2004-12-05

Abstract: The deflecting angles of X-ray beams caused by refractive objects are deduced according to the refractive process at interface of different refractive indexes. The spacial resolution and the electron density resolution of the diffraction enhanced imaging (DEI) method are discussed relating to the experimental parameters. Appearances of refractive contrast in the DEI method are discussed and experimentally confirmed. Vivid images of blood vessels in human liver sample are obtained by DEI technique using X-rays with different energies. The contributions of the refractive contrast in improving the image contrast are easily understood.