-
公开(公告)号：US11327198B2
公开(公告)日：2022-05-10
申请号：US16234621
申请日：2018-12-28
发明人： Xiulin Ni , Jianmin Li , Haitian Tan , Yulan Li , Weifeng Yu , Yuanjing Li , Hejun Zhou , Zhiqiang Chen , Chunguang Zong , Li Zhang
IPC分类号： G01N23/046 , G01V5/00 , A61B6/03 , A61B6/00 , G01N23/18
摘要： The present disclosure relates to the technical field of CT detection, in particular to a CT inspection system and a CT imaging method. The CT inspection system provided by the present disclosure includes a scanning device and an imaging device, wherein the scanning device having a radioactive source device and a detection device is configured to rotate at a nonuniform speed in at least partial process of scanning an object to be detected; and the imaging device generates a CT image based on effective detection data, wherein the effective detection data refer to data acquired each time the detection device rotates by a preset angle. In the present disclosure, the imaging device of the CT inspection system generates a CT image based on data acquired each time the detection device rotates by a preset angle, which, compared with traditional image collection solutions, can effectively reduce image deformation and improve accuracy of detection results.
-
公开(公告)号：US11151422B2
公开(公告)日：2021-10-19
申请号：US16725926
申请日：2019-12-23
发明人： Yanjie Yao , Yongchun Liu , Yan Zhang , Ziran Zhao , Li Zhang , Yuxiang Xing
摘要： Empty container identification method and system are disclosed. The method includes: obtaining customs declaration information, and finding out an vehicle declared as an empty container or an empty vehicle from the customs declaration information; performing X-ray inspection on the vehicle to acquire a transmission image of the vehicle; inputting the transmission image into an empty container identification model obtained by pre-training, so that the empty container identification model determines candidate regions of the transmission image, and performs post-processing analysis on the candidate regions to obtain an image identification result; and comparing the image identification result with the corresponding customs declaration information to determine whether or not the image identification result is consistent with the customs declaration information.
-
公开(公告)号：US20210223188A1
公开(公告)日：2021-07-22
申请号：US15733630
申请日：2020-01-20
发明人： Zhiqiang Chen , Li Zhang , Zhenhua Zhao , Yunda Sun , Xin Jin , Wuyang Liang
IPC分类号： G01N23/046 , G01V13/00 , G01V5/00 , A61B6/03 , A61B6/00
摘要： Disclosed are calibration assembly and calibration method of calibrating geometric parameters of a CT apparatus. The calibration assembly includes at least one calibration unit each including a plurality of calibration wires, and the plurality of calibration wires are arranged regularly in a same plane. The calibration assembly is easy to be processed and can be used to calibrate geometric parameters of a CT apparatus, and the calibration operations are simple and easy to be implemented.
-
84.发明授权公开(公告)号：US10984565B2
公开(公告)日：2021-04-20
申请号：US16235882
申请日：2018-12-28
发明人： Yuxiang Xing , Kaichao Liang , Le Shen , Li Zhang , Hongkai Yang , Kejun Kang , Zhiqiang Chen , Jianmin Li , Yinong Liu
摘要： An image processing method, comprising: acquiring, by a CT scanning system, projection data of an object; and processing, by using a convolutional neural network, the projection data, to acquire an estimated image of the object. The convolutional neural network comprises: a projection domain network for processing input projection data to obtain estimated projection data; an analytical reconstruction network layer for performing analytical reconstruction to obtain a reconstructed image; an image domain network for processing the reconstructed image to obtain an estimated image, a projection layer for performing a projection operation by using a system projection matrix of the CT scanning system, to obtain a projection result of the estimated image; and a statistical model layer for determining consistency among the input projection data, the estimated projection data, and the projection result of the estimated image based on a statistical model.
-
公开(公告)号：US10739491B2
公开(公告)日：2020-08-11
申请号：US16232058
申请日：2018-12-26
发明人： Yigang Yang , Dongyu Wang , Hao Yu , Quanwei Song , Jianmin Li , Weizhen Wang , Yulan Li , Chunguang Zong , Qinjian Zhang , Ming Zeng , Zhiqiang Chen , Yuanjing Li , Li Zhang
摘要： The present disclosure discloses a radiation inspection system and a radiation inspection method. The radiation inspection system comprises a radiation source and a beam modulating device. The beam modulating device comprises a first collimating structure disposed at a beam exit side of the radiation source and a second collimating structure disposed at a beam exit side of the first collimating structure. The second collimating structure is movable relative to the first collimating structure to change a relative position of the first collimating port of the first collimating structure with the second collimating port of the second collimating structure, and the beam modulating device is shifted between a first operational state in which the beam modulating device modulates an initial beam into a fan beam, and a second operational state in which the beam modulating device modulates the initial beam into a pencil beam variable in position.
-
86.发明授权公开(公告)号：US10353110B2
公开(公告)日：2019-07-16
申请号：US15301060
申请日：2015-12-16
发明人： Li Zhang , Shuo Wang , Yunda Sun , Qingping Huang
摘要： The present disclosure provides a method and device for operating a CT-based three-dimensional image used for security inspection. The method includes: providing a CT-based three-dimensional image used for security inspection; accepting a selection of an image of an object in the three-dimensional image; and responding to the selection. The present disclosure has strong practicality, and can provide effective reference information for image judgment in the CT-based security inspection field.
-
公开(公告)号：US10102641B2
公开(公告)日：2018-10-16
申请号：US15204564
申请日：2016-07-07
发明人： Zhiqiang Chen , Li Zhang , Ziran Zhao , Qingping Huang , Qiang Li , Jianping Gu , Yunda Sun
摘要： Methods for extracting a shape feature of an object and security inspection methods and apparatuses. Use is made of CT's capability of obtaining a 3D structure. The shape of an object in an inspected luggage is used as a feature of a suspicious object in combination with a material property of the object. For example, a false alarm rate in detection of suspicious explosives may be reduced.
-
公开(公告)号：US20180172604A1
公开(公告)日：2018-06-21
申请号：US15827739
申请日：2017-11-30
发明人： Chunguang Zong , Ying Li , Hejun Zhou , Quanwei Song , Jianmin Li , Yulan Li , Yuanjing Li , Li Zhang , Zhiqiang Chen
CPC分类号： G01N21/9081 , G01N21/01 , G01N23/04 , G01V5/0016 , G01V5/0025
摘要： A movable ray inspection system used to be mounted in a container yard to inspect an object within a container is provided. The movable ray inspection system includes: a ray generator device configured to emit a ray, a ray receiving device configured to receive the ray, and at least one chamber for receiving the ray generator device and the ray receiving device therein. Each of the at least one chamber is configured to be a standard container or a chamber which has a same shape, a same size and a same structure as a standard container such that the movable ray inspection system is adapted to be stacked in the container yard.
-
公开(公告)号：US09947067B2
公开(公告)日：2018-04-17
申请号：US14753520
申请日：2015-06-29
发明人： Zhiqiang Chen , Li Zhang , Ziran Zhao , Xianghao Wu , Limin Liu , Min Li , Xiaoming Song , Xinfang Huang , Ying Li
CPC分类号： G06T1/20 , G06F17/30861 , G06F17/30902 , G06T1/60
摘要： The present disclosure provides a radiation image inspection system based on B/S architecture. The system comprises: at least one client terminal, configured to initiate an image operation request to a Web server, and display an image operation result on a browser of the client terminal upon receiving a response from the Web server; an image processing assembly, configured to query, based on the image operation request from the client terminal and forwarded by the Web server, an image which the client terminal desires to process, perform an operation on an image as requested by the client terminal, convert the resulted image into an image in a designated format and quality and return the converted image to the browser of the client terminal via the Web server for displaying; and the Web server, configured to receive the image operation request from the client terminal, forward the image operation request to the image processing assembly, and return the image operation result from the image processing assembly to the client terminal.
-
90.发明申请公开(公告)号：US20170328844A1
公开(公告)日：2017-11-16
申请号：US15494884
申请日：2017-04-24
发明人： Liang Li , Zhiqiang Chen , Kejun Kang , Li Zhang , Ziran Zhao , Yuxiang Xing , Jianmin Li , Yulan Li , Tiao Zhao
IPC分类号： G01N23/087
CPC分类号： G01N23/087 , G01N23/046 , G01N2223/206 , G01N2223/419 , G01N2223/423
摘要： Methods and system for decomposing a high-energy dual-energy X-ray CT material are disclosed. In the method, two types of effect such as Compton effect and electron pairing effect which dominates are reserved and the influence of the other effect such a photoelectric effect is removed so as to improve the accuracy of the material decomposition. The unique advantage of the present disclosure is to effectively remove the error of the calculated atomic number Z due to directly selecting two effects during processes of material decomposition in the conventional dual-energy CT method. This may greatly improve the accuracy of dual-energy CT identification of the material, and it is important to improve the conventional dual-use CT imaging system applications, such as clinical therapy, security inspection, industrial non-destructive testing, customs anti-smuggling and other fields.
-
-
-
-
-
-
-
-
-
搜索结果
156 条记录 (耗时 0.026 秒)
