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	Scatter considerations in ultra-high-resolution high-energy X-ray transmission imaging systems
	Wang, LB ; Liu, YO ; Kang, KJ
	2010-05-10 ; 2010-05-10
关键词	compton scatter analytical calculation radiation imaging UHR-HE sharp edge MODEL Instruments & Instrumentation Nuclear Science & Technology Physics, Particles & Fields Spectroscopy
中文摘要	The existence of Compton scatter will lower the performance of radiation imaging systems. Scatter considerations in high-energy X-ray imaging systems are different from low-energy ones. We have developed a method for analytically calculating scatter point spread function (PSF) in ultra-high-resolution, high-energy (UHR-HE) X-ray transmission systems with parallel slat collimator, and applied it to several typical dense objects: a homogeneously attenuating medium, a straight-edge object, and a more practical axisymmetric model (a circular cylindrical object). The scatter distribution along the detector plane can be theoretically calculated by integrating scatter PSF over the full-width of collimator scatter response function. Our method is compared with Monte Carlo simulation for a straight-edge object, and the results fit well. In UHR-HE CT systems, projection error due to scatter is step-like near the sharp edge, and it may evoke high-frequency artifacts in the final reconstruction image, and consequently decreases the system dectectability of high-contrast, microdefects in industrial applications. (C) 2004 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE BV ; AMSTERDAM ; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/22336]
专题	清华大学
推荐引用方式 GB/T 7714	Wang, LB,Liu, YO,Kang, KJ. Scatter considerations in ultra-high-resolution high-energy X-ray transmission imaging systems[J],2010, 2010.
APA	Wang, LB,Liu, YO,&Kang, KJ.(2010).Scatter considerations in ultra-high-resolution high-energy X-ray transmission imaging systems..
MLA	Wang, LB,et al."Scatter considerations in ultra-high-resolution high-energy X-ray transmission imaging systems".(2010).

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