X-ray beam hardening correction for measuring density in linear acceleratorindustrial computed tomography

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. van de Casteele R, van Dyck D, Sijbers J et al. Physics in Medicine and Biology, 2002, 47: 41812. Krumm M, Kasperl S, Franz M. NDT E International,2008, 41: 2423. Brooks R A, Chiro G Di. Physics in Medicine and Biology,1976, 21(3): 3904. Duerinckx A J, Macovski A. Journal of Computer Assisted Tomography, 1978, 2(4): 4815. Rao P S, Al di R J. Radiology, October, 1981, 141: 2236. Zatz L M, Alvarez R E. Radiology, 1977, 124: 917. Hammersberg P, Angard M. Journal of X-ray Science and Technology, 1998, 8(1): 758. Herman G T. Physics in Medicine and Biology, 1979, 24(1):819. Herman G T. The Fundamentals of Computerized Tomog-raphy. New York: Academic Press, 1980. 23-3010. ZENG Gang et al. HEPNP, 2006, 30:178 (in Chinese)