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公开(公告)号：US11474051B2
公开(公告)日：2022-10-18
申请号：US16626572
申请日：2019-05-29
发明人： Yigang Yang , Xuewu Wang , Zhi Zhang , Yuanjing Li , Jianmin Li
IPC分类号： G01N23/09 , G01N23/02 , G01N23/05 , G01N23/083
摘要： The present disclosure provides a dual mode detection method, controller and system, which relates to the technical field of radiation detection. The dual mode detection method of the present disclosure includes: determining a ratio of neutron to X-ray differential cross sections of an inspected object, according to X-ray object detection data, X-ray object-free detection data, neutron object detection data, and neutron object-free detection data; determining a substance type of the inspected object according to a correspondence between the ratio of neutron to X-ray differential cross sections of the inspected object and the substance type.
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公开(公告)号：US09714906B2
公开(公告)日：2017-07-25
申请号：US14577701
申请日：2014-12-19
发明人： Zhiqiang Chen , Yigang Yang , Xuewu Wang , Qinjian Zhang , Huaibi Chen , Yuanjing Li
CPC分类号： G01N23/005 , G01V5/0091 , G21G4/02
摘要： Embodiments of the present invention disclose a nuclide identification method, a nuclide identification system, and a photoneutron emitter. The photoneutron emitter comprises: a pulsed electron accelerator configured for emitting electrons; and a photoneutron converting target configured to receive the electrons emitted by the pulsed electron accelerator and convert the electrons into photoneutrons. The photoneutron converting target has a volume of about 100 to about 8000 cm3, of about 100 to about 2500 cm3, or of about 785 cm3. These embodiments of the present invention can improve an accuracy of identification of a nuclide, and provide a practical photoneutron emitter, method and system for identifying a nuclide. Especially, these embodiments of the present invention can improve an accuracy of identification of a fissile nuclide such as 233U, 235U, and 239Pu, and provide a practical photoneutron emitter, method and system for identifying a fissile nuclide such as 233U, 235U, and 239Pu.
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公开(公告)号：US20140010346A1
公开(公告)日：2014-01-09
申请号：US13946498
申请日：2013-07-19
发明人： Zhiqiang Chen , Li Zhang , Xuewu Wang , Haifeng Hu , Hongxin Wu , Yuanjing Li , Yinong Liu , Ziran Zhao , Yuxiang Xing , Hu Tang , Yumin Yi , Jinyu Zhang
IPC分类号： G01N23/10
CPC分类号： G01N23/10 , A61B6/027 , G01N23/046 , G01N2001/022 , G01N2223/419 , G01N2223/423 , G01N2223/637 , G01N2223/639 , G01V5/00
摘要： Disclosed are a method and a device for security-inspection of liquid articles with dual-energy CT imaging. The method comprises the steps of obtaining one or more CT images including physical attributes of liquid article to be inspected by CT scanning and a dual-energy reconstruction method; acquiring the physical attributes of each liquid article from the CT image; and determining whether there are drugs concealed in the inspected liquid article based on the difference between the acquired physical attributes and reference physical attributes of the inspected liquid article. The CT scanning can be implemented by a normal CT scanning technique, or a spiral CT scanning technique. In the normal CT scanning technique, the scan position can be preset, or set by the operator with a DR image, or set by automatic analysis of the DR image.
摘要翻译： 公开了一种用于双能CT成像的液体物品的安全检查方法和装置。 该方法包括以下步骤：通过CT扫描获得包括待检查的液体物品的物理属性的一个或多个CT图像和双能量重建方法; 从CT图像获取每个液体物品的物理属性; 并且基于被检查的液体制品的所获取的物理属性和参考物理属性之间的差异来确定在被检查的液体制品中是否存在隐藏的药物。 CT扫描可以通过正常的CT扫描技术或螺旋CT扫描技术来实现。 在正常的CT扫描技术中，扫描位置可以由操作员预先设置，或者通过DR图像设置，或者通过DR图像的自动分析设置。
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公开(公告)号：US20230296795A1
公开(公告)日：2023-09-21
申请号：US18041439
申请日：2021-08-12
申请人： Tsinghua University
发明人： Tianyu Ma , Yaqiang Liu , Xuewu Wang , Zhong Wang
CPC分类号： G01T1/1642 , G21K1/025 , G01T1/2992
摘要： Disclosed are a detection collimation unit, a detection apparatus and a SPECT imaging system. The detection collimation unit includes: a scintillation crystal array configured to receive a gamma photon emitted by a radioactive source in a detected object; and a number of photoelectric devices configured to receive the gamma photon and converting the gamma photon into a digital signal. The scintillation crystal array includes a number of scintillation crystals. The number of scintillation crystals are arranged substantially in parallel and are spaced from each other. Each scintillation crystal has a side face configured to receive a ray emitted by the radioactive source and an end face. The number of photoelectric devices are coupled to the end faces of the number of scintillation crystals.
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5.发明授权公开(公告)号：US09915751B2
公开(公告)日：2018-03-13
申请号：US14769308
申请日：2014-07-22
发明人： Kejun Kang , Jianmin Li , Yuanjing Li , Yulan Li , Jingyu Gu , Weizhen Wang , Quanwei Song , Qingjun Zhang , Shenjin Ming , Xuewu Wang , Hui Gong , Tao Xue
IPC分类号： G01V5/00
CPC分类号： G01V5/0016 , G01V5/0075
摘要： The present application discloses a detector module, which is arranged on a detector arm, comprising one or a plurality of detector units arranged in a scattered configuration, wherein each of the detector units in the detector module is installed aiming at a beam center of a ray source, thus improving imaging quality and reducing the size of a detector frame drastically.
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公开(公告)号：US11644584B2
公开(公告)日：2023-05-09
申请号：US17415578
申请日：2019-11-28
申请人： Tsinghua University
发明人： Tianyu Ma , Yaqiang Liu , Xuewu Wang , Zhong Wang
CPC分类号： G01T1/2907 , G21K1/02 , G01T1/2985
摘要： The present disclosure provides a gamma ray imaging device and an imaging method, where the imaging device includes a plurality of separate detectors. The plurality of separate detectors are provided at an appropriate spatial position, in an appropriate arrangement manner and are of an appropriate detector material, such that when rays emitted from different positions in an imaging area reach at least one of the plurality of separate detectors, at least one of the thicknesses of the detectors, the materials of the detectors, and the numbers of the detectors though which the rays pass are different, thereby achieving the effect of determining the directions of rays.
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公开(公告)号：US20180156741A1
公开(公告)日：2018-06-07
申请号：US15716921
申请日：2017-09-27
发明人： Kejun Kang , Jianping Cheng , Zhiqiang Chen , Ziran Zhao , Junli Li , Xuewu Wang , Zhi Zeng , Ming Zeng , Yi Wang , Qingjun Zhang , Jianping Gu , Xi Yi , Bicheng Liu , Guangming Xu , Yongqiang Wang
CPC分类号： G01N23/04 , G01N23/046 , G01N23/06 , G01N23/20008 , G01N2223/304 , G01N2223/33 , G01N2223/401 , G01N2223/419 , G01N2223/652 , G01V5/0016 , G01V5/0025 , G01V5/0091
摘要： Inspection devices and inspection methods are disclosed. The inspection method includes: performing X-ray scanning on an object being inspected so as to generate an image of the object being inspected; dividing the image of the object being inspected to determine at least one region of interest; detecting interaction between a cosmic ray and the region of interest to obtain a detection value; calculating a scattering characteristic value and/or an absorption characteristic value of the cosmic ray in the region of interest based on size information of the region of interest and the detection value; and discriminating a material attribute of the region of interest by means of the scattering characteristic value and/or the absorption characteristic value. With the above technical solutions, inspection accuracy and inspection efficiency may be improved.
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公开(公告)号：US20180084632A1
公开(公告)日：2018-03-22
申请号：US15707342
申请日：2017-09-18
发明人： Yigang Yang , Yuanjing Li , Xuewu Wang , Zhi Zhang
IPC分类号： H05H3/06
摘要： A neutron generation apparatus, a neutron imaging device and an imaging method are disclosed. The neutron imaging device includes a neutron generation apparatus for generating a continuous energy spectrum neutron beam; a neutron detector for receiving a neutron beam which penetrates an object being inspected to obtain an electrical signal; a data collection circuit coupled to the neutron detector, for converting the electrical signal into a digital signal; and a data processing apparatus coupled to the data acquisition circuit, for obtaining images of the object being inspected under neutrons of different energy spectrums based on the digital signal. The above technical solutions may be utilized to generate the continuous energy spectrum neutron beam so that the images of the object being inspected under the neutrons of different energy spectrums may be obtained by the time-of-flight method, improving sensitivity of the detection.
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公开(公告)号：US11619599B2
公开(公告)日：2023-04-04
申请号：US16935415
申请日：2020-07-22
发明人： Zhi Zeng , Xingyu Pan , Xuewu Wang , Junli Li , Ming Zeng , Jianmin Li , Ziran Zhao , Jianping Cheng , Hao Ma , Hui Zhang , Hao Yu , Bicheng Liu
IPC分类号： G01N23/201 , G01N23/02 , G06K9/62
摘要： The present disclosure provides a substance identification device and a substance identification method. The substance identification device comprises: a classifier establishing unit configured to establish a classifier based on scattering density values reconstructed for a plurality of known sample materials, wherein the classifier comprises a plurality of feature regions corresponding to a plurality of characteristic parameters for the plurality of known sample materials, respectively; and an identification unit for a material to be tested, configured to match the characteristic parameter of the material to be tested with the classifier, and to identify a type of the material to be tested by obtaining a feature region corresponding to the characteristic parameter of the material to be tested.
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公开(公告)号：US09121811B2
公开(公告)日：2015-09-01
申请号：US13946498
申请日：2013-07-19
发明人： Zhiqiang Chen , Li Zhang , Xuewu Wang , Haifeng Hu , Hongxin Wu , Yuanjing Li , Yinong Liu , Ziran Zhao , Yuxiang Xing , Hu Tang , Yumin Yi , Jinyu Zhang
CPC分类号： G01N23/10 , A61B6/027 , G01N23/046 , G01N2001/022 , G01N2223/419 , G01N2223/423 , G01N2223/637 , G01N2223/639 , G01V5/00
摘要： Disclosed are a method and a device for security-inspection of liquid articles with dual-energy CT imaging. The method comprises the steps of obtaining one or more CT images including physical attributes of liquid article to be inspected by CT scanning and a dual-energy reconstruction method; acquiring the physical attributes of each liquid article from the CT image; and determining whether there are drugs concealed in the inspected liquid article based on the difference between the acquired physical attributes and reference physical attributes of the inspected liquid article. The CT scanning can be implemented by a normal CT scanning technique, or a spiral CT scanning technique. In the normal CT scanning technique, the scan position can be preset, or set by the operator with a DR image, or set by automatic analysis of the DR image.
摘要翻译： 公开了一种用于双能CT成像的液体物品的安全检查方法和装置。 该方法包括以下步骤：通过CT扫描获得包括待检查的液体物品的物理属性的一个或多个CT图像和双能量重建方法; 从CT图像获取每个液体物品的物理属性; 并且基于被检查的液体制品的所获取的物理属性和参考物理属性之间的差异来确定在被检查的液体制品中是否存在隐藏的药物。 CT扫描可以通过正常的CT扫描技术或螺旋CT扫描技术来实现。 在正常的CT扫描技术中，扫描位置可以由操作员预先设置，或者通过DR图像设置，或者通过DR图像的自动分析设置。
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