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公开(公告)号：US10448904B2
公开(公告)日：2019-10-22
申请号：US16232072
申请日：2018-12-26
发明人： Liang Li , Zhiqiang Chen , Kejun Kang , Ziran Zhao , Li Zhang , Yuxiang Xing , Tiao Zhao , Jianmin Li , Bicheng Liu , Qian Yi
摘要： The present disclosure provides a decomposition method based on basis material combination. In the present disclosure, a scanned object is divided into a plurality of regions, the basis material combinations used in each of the divided regions are different each other, and the scanned object is re-divided according to the re-determined equivalent atomic number of its each point until the change on decomposition coefficient meets certain conditions. Thereby, a decomposition method based on dynamic basis material combinations is realized, which reduces a decomposition error caused by improper selection of the basis material combination and improves the accuracy of the decomposition and substance identification of the multi-energy CT.
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公开(公告)号：US10302578B2
公开(公告)日：2019-05-28
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： G01N23/046 , G01N23/087
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.
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公开(公告)号：US20180217071A1
公开(公告)日：2018-08-02
申请号：US15505199
申请日：2015-12-23
发明人： Zhiqiang Chen , Li Zhang , Le Shen , Qingping Huang , Xin Jin
IPC分类号： G01N23/046
CPC分类号： G01N23/046 , G01N23/041 , G01N2223/1016 , G01N2223/419
摘要： An X-ray imaging system and method are provided. The system may include: an X-ray source configured to irradiate X-ray beams; a first grating and a second grating arranged sequentially in an irradiation direction of the X-ray beams; a detector arranged at downstream of the second grating in the irradiation direction; and a controller and data processing device configured to control the X-ray source to irradiate the X-ray beams, to control the detector to receive X-ray beams passing through the first grating and the second grating to generate phase contrast information and/or dark field information, and to perform CT check on an object under check based on the phase contrast information and/or the dark field information to obtain a CT image. In this way, it is possible to obtain more characteristic information about the object under check, so as to achieve more precise material recognition and security check.
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公开(公告)号：US20180038970A1
公开(公告)日：2018-02-08
申请号：US15597003
申请日：2017-05-16
发明人： Liang Li , Zhiqiang Chen , Li Zhang , Ziran Zhao , Yuxiang Xing , Kejun Kang , Lan Zhang , Ruizhe Li
IPC分类号： G01T7/00 , G01N23/223
CPC分类号： G01T7/005 , G01N23/223 , G01N2223/076 , G01N2223/303
摘要： A method and apparatus for reconstructing an incident energy spectrum for a detector are disclosed. In this method, an object to be inspected is illuminated with rays, and then rays transmitted through the object to be inspected are received by the detector to convert the received rays into data of a detected energy spectrum. The incident energy spectrum for the detector is reconstructed based on the data of the energy spectrum using a statistical iterative algorithm with a pre-established detector response function. With the above solution of the embodiments, the incident energy spectrum for the detector can be more accurately acquired, thereby reducing a distortion of the incident energy spectrum caused by the detector.
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公开(公告)号：US09885801B2
公开(公告)日：2018-02-06
申请号：US14748407
申请日：2015-06-24
发明人： Zhiqiang Chen , Li Zhang , Xin Jin , Qingping Huang , Le Shen , Yunda Sun
CPC分类号： G01V5/0041 , A61B6/4266 , G01T1/202 , G01T1/362 , G01T7/08 , G01V5/005
摘要： The present disclosure discloses a detector device comprising a plurality of detector assemblies. Each detector assembly comprises at least one detection crystal units having a first energy response and those having a second energy response, which are both arranged along a first direction at intervals, each detection crystal unit having a first/second energy response including at least one detection crystals having a first/second energy response arranged along a second direction. The at least one detection crystal units having a first energy response and the at least one detection crystal units having a second energy response are, at least partially, alternatively arranged along the first direction when viewed from an incidence direction of the X-ray. The present disclosure also discloses a dual energy CT system having the detector device and a CT detection method using this system.
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公开(公告)号：US20180022301A1
公开(公告)日：2018-01-25
申请号：US15609013
申请日：2017-05-31
发明人： Jianmin Li , Hao Yu , Zhiqiang Chen , Yuanjing Li , Yulan Li , Li Zhang , Jingyu Gu , Dongyu Wang
IPC分类号： B60R16/033 , H01M10/052 , H01M10/42 , H02J7/00
CPC分类号： B60R16/033 , H01M10/052 , H01M10/4207 , H02J3/14 , H02J7/0021 , Y02B70/3225 , Y04S20/222
摘要： The present disclosure discloses an in-vehicle detection system and power supply system and power supply controller, which relates to the power supply control field. The power supply system comprises a low-power generator; a battery pack for supplying power to the in-vehicle detection system; a charger electrically connected to the low-power generator and the battery pack, respectively; and a power supply controller electrically connected to the battery pack and the low-power generator, respectively. The present disclosure uses a low-power generator and a battery pack to substitute a high-power generator, which can reduce the requirement on a peak power of the generator by the in-vehicle detection system, and improve the efficiency of the power supply. In addition, since a low-power generator and a lithium battery pack are used to substitute the high-power generator, it is favorable to the lightweight design of the in-vehicle detection system, and meanwhile reduces noises and vibration, and is favorable to improving the user experience and performance metrics.
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17.发明授权公开(公告)号：US09773326B2
公开(公告)日：2017-09-26
申请号：US14751044
申请日：2015-06-25
发明人： Li Zhang , Xin Jin , Qingping Huang , Yunda Sun
CPC分类号： G06T11/003 , A61B6/032 , A61B6/5205 , A61B6/583 , G01N23/046 , G01V5/0041 , G01V5/005 , G06T2207/10081
摘要： The present invention provides a CT image calibration method and device and a CT system. The method includes: arranging a fixed calibration element at the outside of a channel area and within the maximal reconstruction area of a CT scanning device, and storing the theoretical value of the fixed calibration element; collecting the projection data of the fixed calibration element to obtain the actual reconstructed image of the fixed calibration element; and comparing the actual reconstructed image with the stored corresponding theoretical value, to establish a mapping function for correcting the actual reconstructed image into the theoretical value. By adopting the present invention, the calibration quality can be effectively improved, the image calibration effect is enhanced, the reliability of the CT scanning device is improved and the maintenance cost is saved, thus the practical application value is very high.
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18.发明授权Recognizing method of flaky or blocky prohibited articles, explosives or drugs 有权识别薄片或块状物品，爆炸物或药物的方法公开(公告)号：US09542624B2
公开(公告)日：2017-01-10
申请号：US15074270
申请日：2016-03-18
发明人： Li Zhang , Qingping Huang , Yunda Sun , Lei Lei , Zhi Tang
CPC分类号： G06K9/6267 , G01V5/005 , G06K9/52 , G06K2009/4666 , G06T5/00 , G06T7/40 , G06T7/60 , G06T2207/10088 , G06T2207/20021 , G06T2207/20172 , G06T2207/30242
摘要： The present invention discloses recognizing methods of flaky or blocky prohibited articles, explosives or drugs. Specifically, the method for recognizing flaky prohibited articles, explosives or drugs comprises steps of: (1) reading in tomogram data of an object to be inspected for one tomogram; (2) pre-processing the tomogram data; (3) splitting the pre-processed tomogram data into a plurality of regions that have similar physical properties; (4) analyzing whether each of the split regions is a flaky region; (5) determining whether the flaky region recognized in the current tomogram can be merged with the flaky region detected from the previous tomogram, so as to form a flaky target; (6) determining whether each detected flaky target is complete or finished; (7) repeating steps (1)-(6) and processing each tomogram data layer by layer, until all of the tomogram data have been processed.
摘要翻译： 本发明公开了识别片状或块状物品，爆炸物或药物的方法。 具体来说，用于识别片状禁止物品，爆炸物或药物的方法包括以下步骤：（1）读取对于一个断层图像进行检查的物体的断层图数据; （2）预处理断层图像数据; （3）将预处理的断层图像数据分割成具有类似物理性质的多个区域; （4）分析每个分割区域是否是片状区域; （5）确定在当前断层图像中识别的片状区域是否可以与从先前断层图像检测到的片状区域合并，以便形成片状目标; （6）确定每个检测到的片状目标是完整还是完成; （7）重复步骤（1） - （6）并逐层处理每个断层图像数据，直到所有断层图像数据都被处理。
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19.发明申请RECOGNIZING METHOD OF FLAKY OR BLOCKY PROHIBITED ARTICLES, EXPLOSIVES OR DRUGS 有权FLAKY或封闭禁止物品的识别方法，爆炸物或药物公开(公告)号：US20160314378A1
公开(公告)日：2016-10-27
申请号：US15074270
申请日：2016-03-18
发明人： Li Zhang , Qingping Huang , Yunda Sun , Lei Lei , Zhi Tang
CPC分类号： G06K9/6267 , G01V5/005 , G06K9/52 , G06K2009/4666 , G06T5/00 , G06T7/40 , G06T7/60 , G06T2207/10088 , G06T2207/20021 , G06T2207/20172 , G06T2207/30242
摘要： The present invention discloses recognizing methods of flaky or blocky prohibited articles, explosives or drugs. Specifically, the method for recognizing flaky prohibited articles, explosives or drugs comprises steps of: (1) reading in tomogram data of an object to be inspected for one tomogram; (2) pre-processing the tomogram data; (3) splitting the pre-processed tomogram data into a plurality of regions that have similar physical properties; (4) analyzing whether each of the split regions is a flaky region; (5) determining whether the flaky region recognized in the current tomogram can be merged with the flaky region detected from the previous tomogram, so as to form a flaky target; (6) determining whether each detected flaky target is complete or finished; (7) repeating steps (1)-(6) and processing each tomogram data layer by layer, until all of the tomogram data have been processed.
摘要翻译： 本发明公开了识别片状或块状物品，爆炸物或药物的方法。 具体来说，用于识别片状禁止物品，爆炸物或药物的方法包括以下步骤：（1）读取对于一个断层图像进行检查的物体的断层图数据; （2）预处理断层图像数据; （3）将预处理的断层图像数据分割成具有类似物理性质的多个区域; （4）分析每个分割区域是否是片状区域; （5）确定在当前断层图像中识别的片状区域是否可以与从先前断层图像检测到的片状区域合并，以便形成片状目标; （6）确定每个检测到的片状目标是完整还是完成; （7）重复步骤（1） - （6）并逐层处理每个断层图像数据，直到所有断层图像数据都被处理。
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公开(公告)号：US20150356755A1
公开(公告)日：2015-12-10
申请号：US14758795
申请日：2013-10-31
发明人： Le Shen , Yuxiang Xing , Yuanji Li , Chuqing Feng , Li Zhang , Zhiqiang Chen
CPC分类号： G06T11/005 , A61B6/032 , A61B6/4241 , A61B6/4266 , A61B6/482 , A61B6/5205 , G01N23/046 , G01N2223/419 , G01T1/2985 , G06T5/50 , G06T2207/10081 , G06T2207/20182
摘要： CT imaging systems and methods thereof are disclosed. A common CT scanning is performed on an object to obtain a common CT imaging. An area of interest is determined from the image. A CT scanning is performed on the area of interest under a plurality of energy windows by a photon counter detector. A high resolution image of the area of interest is reconstructed. The discrimination of energy spectrum is higher and the result so obtained is more stable by using a photon counter detector to collect photon count projection data of a plurality of energy windows and thus it may be decomposed into a plurality of basis functions.
摘要翻译： 公开了CT成像系统及其方法。 对物体执行常见的CT扫描以获得常见的CT成像。 根据图像确定感兴趣的区域。 通过光子计数器检测器在多个能量窗口下对感兴趣的区域进行CT扫描。 重建感兴趣区域的高分辨率图像。 通过使用光子计数器检测器来收集多个能量窗口的光子计数投影数据，能量谱的辨别较高，得到的结果更加稳定，因此可将其分解为多个基本函数。
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