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	Beam hardening correction for a cone-beam ct system and its effect on spatial resolution
	Zhao Wei1,2,3; Fu Guo-Tao1,2,3; Sun Cui-Li1,2; Wang Yan-Fang1,2; Wei Cun-Feng1,2; Cao Da-Quan1,2,3; Que Jie-Min1,2; Tang Xiao1,2,3; Shi Rong-Jian1,2; Wei Long1,2
刊名	Chinese physics c
	2011-10-01
卷号	35期号:10页码:978-985
关键词	Beam hardening correction Cone-beam computed tomography Spatial resolution
ISSN号	1674-1137
DOI	10.1088/1674-1137/35/10/018
通讯作者	Zhao wei(zhaow@ihep.ac.cn)
英文摘要	In this paper, we present a beam hardening correction (bhc) method in three-dimension space for a cone-beam computed tomography (cbct) system in a mono-material case and investigate its effect on the spatial resolution. due to the polychromatic character of the x-ray spectrum used, cupping and streak artifacts called beam hardening artifacts arise in the reconstructed ct images, causing reduced image quality. in addition, enhanced edges are introduced in the reconstructed ct images because of the beam hardening effect. the spatial resolution of the cbct system is calculated from the edge response function (erf) on different planes in space. thus, in the ct images with beam hardening artifacts, enhanced erfs will be extracted to calculate the modulation transfer function (mtf), obtaining a better spatial resolution that deviates from the real value. reasonable spatial resolution can be obtained after reducing the artifacts. the 10% mtf value and the full width at half maximum (fwhm) of the point spread function with and without bhc are presented.
WOS关键词	COMPUTED-TOMOGRAPHY
WOS研究方向	Physics
WOS类目	Physics, Nuclear ; Physics, Particles & Fields
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000295742500018
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2176139
专题	高能物理研究所
通讯作者	Zhao Wei
作者单位	1.CAS, Inst High Energy Phys, Key Lab Nucl Analyt Tech, Beijing 100049, Peoples R China 2.Beijing Engn Res Ctr Radiog Tech & Equipment, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhao Wei,Fu Guo-Tao,Sun Cui-Li,et al. Beam hardening correction for a cone-beam ct system and its effect on spatial resolution[J]. Chinese physics c,2011,35(10):978-985.
APA	Zhao Wei.,Fu Guo-Tao.,Sun Cui-Li.,Wang Yan-Fang.,Wei Cun-Feng.,...&Yu Zhong-Qiang.(2011).Beam hardening correction for a cone-beam ct system and its effect on spatial resolution.Chinese physics c,35(10),978-985.
MLA	Zhao Wei,et al."Beam hardening correction for a cone-beam ct system and its effect on spatial resolution".Chinese physics c 35.10(2011):978-985.

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