Improving the detection efficiency and modulation transfer function of lens-coupled indirect X-ray imaging detectors based on point spread functions simulated according to lens performance parameters

doi:10.1107/S1600577518007889

	Improving the detection efficiency and modulation transfer function of lens-coupled indirect X-ray imaging detectors based on point spread functions simulated according to lens performance parameters
	Jiang XM(姜晓明); Wang YP(王艳萍); Li G(黎刚); Zhang J(张杰); Zhao Y(赵越); Jiang, XM; Zhu, Y; Li, K; Zhao, Y; Yi, QR
刊名	JOURNAL OF SYNCHROTRON RADIATION
	2018
卷号	25 页码:1093-1105
关键词	lens-coupled indirect X-ray imaging detector detection efficiency point spread function modulation transfer function lens performance parameters
ISSN号	1600-5775
DOI	10.1107/S1600577518007889
文献子类	Article
英文摘要	Lens-coupled indirect X-ray imaging detectors have the advantage of high resolution and the disadvantage of low detection efficiency. Using thicker single-crystalline films (SCFs) can improve the detection efficiency. However, the image quality will become worse due to the degradation of the point spread function (PSF) and modulation transfer function (MTF). This disadvantage can be improved by deconvolution with the PSF, which is unknown. In this article, a method was established to acquire the PSF based on a simulation of the imaging process for a lens-coupled indirect X-ray imaging detector. Because the structural parameters of commercial lenses cannot usually be obtained, the PSFs were calculated from lens performance parameters. PSFs were calculated using the conditions of 12keV X-ray energy, 10x and 40x magnification objectives and 4.6 mu m- and 20 mu m-thick GGG:Tb scintillators. These were then used to deconvolve images of an Xradia resolution test pattern taken under the same conditions. The results show that after deconvolution the MTF had been clearly improved for both the 4.6 mu m- and 20 mu m-thick SCFs, indicating that the image has better quality than before deconvolution. Furthermore, a PSF deconvolution was performed on mouse brain tissue projection images, and the original and deconvolution projection images were used to perform computed-tomography reconstruction; the result proved that the method was effective for improving the image quality of low-contrast samples. Therefore, this method shows promise in allowing the use of thick SCFs to improve the detection efficiency while maintaining good image quality.
WOS关键词	SPATIAL-RESOLUTION ; SPECTRAL TRANSMITTANCE ; FILM SCINTILLATOR
WOS研究方向	Instruments & Instrumentation ; Optics ; Physics
语种	英语
WOS记录号	WOS:000437744600020
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286100]
专题	高能物理研究所_多学科研究中心高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Jiang XM,Wang YP,Li G,et al. Improving the detection efficiency and modulation transfer function of lens-coupled indirect X-ray imaging detectors based on point spread functions simulated according to lens performance parameters[J]. JOURNAL OF SYNCHROTRON RADIATION,2018,25:1093-1105.
APA	姜晓明.,王艳萍.,黎刚.,张杰.,赵越.,...&李琨.(2018).Improving the detection efficiency and modulation transfer function of lens-coupled indirect X-ray imaging detectors based on point spread functions simulated according to lens performance parameters.JOURNAL OF SYNCHROTRON RADIATION,25,1093-1105.
MLA	姜晓明,et al."Improving the detection efficiency and modulation transfer function of lens-coupled indirect X-ray imaging detectors based on point spread functions simulated according to lens performance parameters".JOURNAL OF SYNCHROTRON RADIATION 25(2018):1093-1105.