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Tb^(3+)-doped borosilicate glass scintillators for highresolution x-ray imaging

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中国光学快报:英文版 2023年第7期21卷 46-52页

作者：黄文俊陈俊宇李怡吴悦悦李连杰陈莉萍郭海 Department of Physics Zhejiang Normal UniversityJinhua 321004China

Scintillators are the vital component in x-ray perspective image technology that is applied in medical imaging,industrial nondestructive testing,and safety *** the high cost and small size of single-crystal commercialized scintillators limit their practical ***,a series of Tb^(3+)-doped borosilicate glass(BSG)scintillators with big production size,low cost,and high spatial resolution are designed and *** structural,photoluminescent,and scintillant properties are systematically *** from excellent transmittance(87%at 600 nm),high interquantum efficiency(60.7%),and high x-ray excited luminescence(217%of Bi4Ge3O12),the optimal sample shows superhigh spatial resolution(exceeding 20 lp/mm).This research suggests that Tb^(3+)-doped BSG scintillators have potential applications in the static x-ray imaging field.

关键词： scintillators borosilicate glass x-ray imaging Tb^(3+) high spatial resolution

Centimeter-sized Cs_(3)Cu_(2)I_(5)single crystals grown by oleic acid assisted inverse temperature crystallization strategy and their films for high-quality x-ray imaging

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Journal of Energy Chemistry 2023年第4期79卷 382-389页

作者： Tao Chen xin Li Yong Wang Feng Lin Ruliang Liu Wenhua Zhang Jie Yang Rongfei Wang xiaoming Wen Bin Meng xuhui xu Chong Wang National Center for International Research on Photoelectric and Energy Materials School of Materials and EnergyYunnan UniversityKunming 650091YunnanChina College of Materials Science and Engineering Key Laboratory of Advanced Materials of Yunnan ProvinceKunming University of Science and TechnologyKunming 650093YunnanChina Centre for Translational Atomaterials Swinburne University of TechnologyHawthorn 3122Australia

Low-dimensional halide perovskites have become the most promising candidates for x-ray imaging,yet the issues of the poor chemical stability of hybrid halide perovskite,the high poisonousness of lead halides and the relatively low detectivity of the lead-free halide perovskites which seriously restrain its ***,we developed a solution inverse temperature crystal growth(ITCG)method to bring-up high quality Cs_(3)Cu_(2)I_(5)crystals with large size of centimeter order,in which the oleic acid(OA)is introduced as an antioxidative ligand to inhibit the oxidation of cuprous ions effieiently,as well as to decelerate the crystallization rate *** on these fine crystals,the vapor deposition technique is empolyed to prepare high quality Cs_(3)Cu_(2)I_(5)films for efficient x-ray *** surface morphology,high light yields and short decay time endow the Cs_(3)Cu_(2)I_(5)films with strong radioluminescence,high resolution(12 lp/mm),low detection limits(53 nGyair/s)and desirable ***,the Cs_(3)Cu_(2)I_(5)films have been applied to the practical radiography which exhibit superior x-ray imaging *** work provides a paradigm to fabricate nonpoisonous and chemically stable inorganic halide perovskite for x-ray imaging.

关键词： Inverse temperature crystal growth Cs_(3)Cu_(2)I_(5)single crystal Vapor deposition Cs_(3)Cu_(2)I_(5)films x-ray imaging

The new x-ray imaging and biomedical application beamline BL13HB at SSRF

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Nuclear Science and Techniques 2023年第12期34卷 190-205页

作者： Jian‑Feng Ji Han Guo Yan‑Ling xue Rong‑Chang Chen Ya‑Nan Fu Guo‑Hao Du Biao Deng Hong‑Lan xie Ti‑Qiao xiao Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Shanghai Institute of Applied Physics China Academy of ScienceShanghai 201800China

A new x-ray imaging and biomedical application beamline(BL13HB)has been implemented at the Shanghai Radiation Synchrotron Facility(SSRF)as an upgrade to the old x-ray imaging and biomedical application beamline(BL13W1).This is part of the Phase II construction project of the *** BL13HB is dedicated to 2D and 3D static and dynamic x-ray imaging,with a field of view of up to 48.5 mm×5.2 mm and spatial resolution as high as 0.8μm.A super-bending magnet is used as the x-ray source in BL13HB,which has a maximum magnetic field of 2.293 *** energy range of monochromatic x-ray photons from a double-multiplayer monochromator was 8–40 keV,and the white beam mode was provided on the beamline for dynamic x-ray imaging and dynamic x-ray *** maintaining the previous experimental setup of BL13W1,new equipment was added to the beamline experimental *** beamline is equipped with different sets of x-ray imaging detectors for several experimental methods such as micro-CT,dynamic micro-CT,and pair distribution *** experimental station of BL13HB is designed specifically for various in situ dynamic experiments,and BL13HB has been open to users since June 2021.

关键词： x-ray imaging Dynamic micro-CT Shanghai Synchrotron Radiation Facility

x-ray imaging of atomic nuclei

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Science China Materials 2020年第9期63卷 1788-1796页

作者： Jie xu Jia He Yi Ding Jun Luo Center for Electron Microscopy and Tianjin Key Lab of Advanced Functional Porous Materials Institute for New Energy Materials&Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

Optically imaging atomic nuclei is a long-sought goal for scientific and applied research,but it has never been realized so *** integrate aberration-corrected scanning transmission electron microscopy(STEM),the bremsstrahlung generation of x-ray photons,and the energy-dispersive x-ray spectroscopic(EDS)receiving and mapping of the photons into a new microscopy method of optical imaging,by which atomic nuclei of different materials are successfully imaged with x-ray ***,this imaging method is shown to be workable with different STEM instruments and be capable of distinguishing atomic nuclei of different elements and resolving imaged size differences of atomic nuclei with the order of magnitude as small as 1 ***,it is a general method that can image atomic nuclei and their evolutions in materials science,chemistry and physics.

关键词： atomic nuclei x-ray imaging bremsstrahlung aberration-corrected scanning transmission electron microscopy

Biomedical x-ray imaging Enabled by Carbon Nanotube x-ray Sources

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Chinese Journal of Chemical Physics 2018年第4期31卷 529-536,615页

作者： Guohua Cao Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences Virginia Poly.technic Institute and State University（Virginia Tech）BlacksburgVA 24061USA

Although discovered more than 100 years ago, x-ray source technology has evolved rather slowly. The recent invention of the carbon nanotube （CNT） x-ray source technology holds great promise to revolutionize the field of biomedical x-ray imaging. CNT x-ray sources have been successfully adapted to several biomedical imaging applications including dynamic rnicro-CT of small animals and stationary breast tomosynthesis of breast cancers. Yet their more irnportant biomedical imaging applications still lie ahead in the future, with the devel- oprnent of stationary rnulti-source CT as a noteworthy exarnple.

关键词： Biomedical imaging x-ray imaging x-ray source Carbon nanotube x-raysource Carbon nanotube Field emission Cornputed tornography Breast tornosynthesis

Design and Synthesis of Tb^(3+)-doped KGW Crystal for the Exploration of Scintillation Performance with x-ray imaging

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Chinese Journal of Structural Chemistry 2021年第8期40卷 1023-1030,969页

作者： xU Hui xU Wei-Wei xU Liu-Wei WANG Zhi-Lin WANG Shuai-Hua SU Qing ZHANG Bi-Sheng ZENG Qing-You WU Shao-Fan College of Chemistry Fuzhou UniversityFuzhou 350108China Key Laboratory of Optoelectronic Materials Chemistry and Physics Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient DevicesFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Communications Planning&Design Institute Company Fuzhou 350004China Fujian Luhai Engineering Investigation&Designing Company Fuzhou 350000China

x-ray scintillators have been widely used in many fields owing to their strong penetrating ability,including security inspection,medical imaging,nuclear cameras,high energy physics and so *** explore new scintillation materials,we designed and synthesized KGW:Tb bulk scintillation crystals with monoclinic phase *** explored the fluorescence performance of KGW:Tb by testing the photoluminescence spectrum and fluorescence decay curve and observed strong green light emission in the visible light range at room ***,our crystal has a high stability under x-ray irradiation,a good sensitivity response and an appreciable light output(3424 ph/MeV)that is approximately twenty times more than ***,we used a 0.98 mm thickness polished crystal sheet for x-ray imaging applications and observed excellent ***,KGW:Tb crystal may be an important direction for x-ray scintillation detection.

关键词： KGW x-ray scintillators light yield high stability x-ray imaging

Detecting Lumbar Implant and Diagnosing Scoliosis from Vietnamese x-ray imaging Using the Pre-Trained API Models and Transfer Learning

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Computers, Materials & Continua 2021年第1期66卷 17-33页

作者： Chung Le Van Vikram Puri Nguyen Thanh Thao Dac-Nhuong Le Duy Tan University Da Nang550000Vietnam Department of Radiology Hue University of Medicine and PharmacyHue UniversityHue530000Vietnam Institute of Research and Development Duy Tan UniversityDanang550000Vietnam Faculty of Information Technology Duy Tan UniversityDanang550000Vietnam

With the rapid growth of the autonomous system,deep learning has become integral parts to enumerate applications especially in the case of healthcare *** body vertebrae are the longest and complex parts of the human *** are numerous kinds of conditions such as scoliosis,vertebra degeneration,and vertebrate disc spacing that are related to the human body vertebrae or spine or *** detection of these problems is very important otherwise patients will suffer from a disease for a *** this proposed system,we developed an autonomous system that detects lumbar implants and diagnoses scoliosis from the modified Vietnamese x-ray *** applied two different approaches including pre-trained APIs and transfer learning with their pre-trained models due to the unavailability of sufficient x-ray medical *** results show that transfer learning is suitable for the modified Vietnamese x-ray imaging data as compared to the pre-trained API ***,we also explored and analyzed four transfer learning models and two pre-trained API models with our datasets in terms of accuracy,sensitivity,and specificity.

关键词： Lumbar implant diagnosing scoliosis x-ray imaging transfer

Methodology development and application of x-ray imaging beamline at SSRF

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Nuclear Science and Techniques 2020年第10期31卷 74-94页

作者： Hong-Lan xie Biao Deng Guo-Hao Du Ya-Nan Fu Han Guo Yan-Ling xue Guan-Yun Peng Fen Tao Ling Zhang Ti-Qiao xiao Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Shanghai Synchrotron Radiation Facility(SSRF) Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China

This paper introduces some latest developments regarding the x-ray imaging methodology and applications of the x-ray imaging and biomedical application beamline(BL13W1)at Shanghai Synchrotron Radiation Facility in the past 5 *** photon energy range of the beamline is 8–72.5 *** sets of x-ray imaging detectors with different pixel sizes(0.19–24 lm)are used to realize x-ray microcomputed tomography(x-ray micro-CT)and x-ray in-line phase-contrast *** satisfy the requirements of user experiments,new x-ray imaging methods and image processing techniques are *** vivo dynamic micro-CT experiments with living insects are performed in 0.5 s(sampling rate of 2 Hz,2 tomograms/s)with a monochromatic beam from a wiggler source and in 40 ms(sampling rate of 25 Hz,25 tomograms/s)with a white beam from a bending magnet source.A new x-ray imaging method known as move contrast x-ray imaging is proposed,with which blood flow and moving tissues in raw images can be distinguished according to their moving frequencies in the time ***,x-ray speckle-tracking imaging with twice exposures to eliminate the edge enhancement effect is developed.A high-precision quantification method is realized to measure complex three-dimensional blood vessels obtained via x-ray micro-CT.x-ray imaging methods such as three-dimensional x-ray diffraction microscopy,small-angle x-ray scattering CT,and x-ray fluorescence CT are developed,in which the x-ray micro-CT imaging method is combined with other contrast mechanisms such as diffraction,scattering,and fluorescence contrasts ***,an x-ray nano-CT experiment is performed with a 100 nm spatial *** user experimental results from the fields of material science,biomedicine,paleontology,physics,chemistry,and environmental science obtained on the beamline are provided.

关键词： x-ray imaging x-ray in-line phase-contrast imaging x-ray micro-CT Dynamic micro-CT x-ray speckle-tracking imaging 3DxRD SAxS-CT x-ray fluorescence CT x-ray nano-CT Move contrast x-ray imaging

Three-dimensional structured on-chip stacked zone plates for nanoscale x-ray imaging with high efficiency

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Nano Research 2014年第4期7卷 528-535页

作者： Stephan Werner Stefan Rehbein Peter Guttmann Gerd Schneider Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH Institute for Soft Matter and Functional Materials Albert-Einstein-Straβe15 12489 Berlin Germany

Fresnel zone plates are the key optical elements for nanoscale focusing of x-ray beams with high spatial resolution. Conventional zone plates manufactured by planar nanotechnology processes are limited by the achievable aspect ratios of their zone structures. Additionally, ultra-high resolution x-ray optics with high efficiency requires three-dimensional （3-D） shaped tilted zones. The combination of high spatial resolution and high diffraction efficiency is a fundamental problem in x-ray optics. Based on electrodynamical simulations, we find that the optimized zone plate profile for volume diffraction is given by zone structures with radially increasing tilt angles and decreasing zone heights. On-chip stacking permits the realization of such advanced 3-D profiles without significant loss of the maximum theoretical efficiency. We developed triple layer on-chip stacked zone plates with an overlay accuracy of sub-2 nm which fulfills the nanofabrication requirements. Efficiency measurements of on-chip stacked zone plates show significantly increased values compared to conventional zone plates.

关键词： x-ray optics Fresnel zone plates x-ray imaging x-ray microscopy volume diffraction