典型文献
Spatial resolution and image processing for pinhole camera-based X-ray fluorescence imaging:a simulation study
文献摘要：
Spatial resolution and image-processing meth-ods for full-field X-ray fluorescence(FF-XRF)imaging using X-ray pinhole cameras were studied using Geant4 simulations with different geometries and algorithms for image reconstruction.The main objectives were:(1)cal-culating the quantum efficiency curves of specific cameras,(2)studying the relationships between the spatial resolution and the pinhole diameter,magnification,and camera bin-ning value,and(3)comparing image-processing methods for pinhole camera systems.Several results were obtained using a point and plane source as the X-ray fluorescence emitter and an array of 100×100 silicon pixel detectors as the X-ray camera.The quantum efficiency of a back-illu-minated deep depletion(BI-DD)structure was above 30％for the XRF energies in the 0.8-9 keV range,with the maximum of 93.7％at 4 keV.The best spatial resolution of the pinhole camera was 24.7 μm and 31.3 lp/mm when measured using the profile function of the point source,with the diameter of 20 μm,magnification of 3.16,and camera bin of 1.A blind deconvolution algorithm with Gaussian filtering performed better than the Wiener filter and Richardson iterative methods on FF-XRF images,with the signal-to-noise ratio of 7.81 dB and improved signal-to-noise ratio of 7.24 dB at the diameter of 120 μm,magnification of 1.0,and camera bin of 1.
文献关键词：
中图分类号：
作者姓名：
Ze He;Ning Huang;Peng Wang;Zi-Han Chen;Bo Peng
作者机构：
Key Laboratory of Radiation Physics and Technology of the Ministry of Education,Institute of Nuclear Science and Technology,Sichuan University,Chengdu 610064,China
文献出处：
引用格式：
[1]Ze He;Ning Huang;Peng Wang;Zi-Han Chen;Bo Peng-.Spatial resolution and image processing for pinhole camera-based X-ray fluorescence imaging:a simulation study)[J].核技术（英文版）,2022(05):135-153
A类：
minated
B类：
Spatial,resolution,processing,pinhole,fluorescence,imaging,full,field,FF,XRF,using,cameras,were,studied,Geant4,simulations,different,geometries,algorithms,reconstruction,main,objectives,cal,culating,quantum,efficiency,curves,specific,studying,relationships,between,spatial,diameter,magnification,bin,ning,value,comparing,methods,systems,Several,results,obtained,point,plane,source,emitter,array,silicon,pixel,detectors,back,illu,deep,depletion,BI,DD,structure,was,above,energies,keV,range,maximum,best,lp,when,measured,profile,function,blind,deconvolution,Gaussian,filtering,performed,better,than,Wiener,Richardson,iterative,images,signal,noise,ratio,dB,improved
AB值：
0.474428
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