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公开(公告)号：US11340177B2
公开(公告)日：2022-05-24
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
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.
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公开(公告)号：US10338011B2
公开(公告)日：2019-07-02
申请号：US15263207
申请日：2016-09-12
发明人： Zhiqiang Chen , Li Zhang , Tianyi Yang Dai , Qingping Huang , Yunda Sun , Xin Jin
IPC分类号： G01N23/046 , G01N23/083 , G01N23/207 , G21K1/02 , G01N23/20 , G01V5/00
摘要： The present disclosure relates to multi-modality detection systems and methods. One illustrative multi-modality detection system may include a distributed radiation source configured to irradiate an object under detection, a primary collimator configured to separate rays of the distributed radiation source into two parts, wherein one part is for CT detection and the other part is for XRD detection, a CT detection device configured to perform a CT detection to acquire a CT image of the object under detection, and an XRD detection device configured to perform an XRD detection to acquire an XRD image of the object under detection, wherein the CT detection and the XRD detection are performed simultaneously.
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公开(公告)号：US09978184B2
公开(公告)日：2018-05-22
申请号：US14540440
申请日：2014-11-13
发明人： Zhiqiang Chen , Yuanjing Li , Ziran Zhao , Shuo Wang , Jianping Gu , Yunda Sun
CPC分类号： G06T19/20 , G06T7/0012 , G06T15/06 , G06T15/08 , G06T15/10 , G06T17/005 , G06T2207/10136 , G06T2210/12 , G06T2219/2021
摘要： The present disclosure provides method and apparatus for marking a target in a 3D image. The method include steps of: acquiring Computed Tomography (CT) image data of a scene; rendering a 3D image of the scene using ray casting based on the CT image data; removing a transparent region from the 3D image based on a fixed 2D transfer function; and marking the target in the 3D image.
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公开(公告)号：US09784883B2
公开(公告)日：2017-10-10
申请号：US14577069
申请日：2014-12-19
发明人： Zhiqiang Chen , Li Zhang , Qingping Huang , Yunda Sun , Xin Jin , Tao Yang , Le Shen , Ji Zhao
CPC分类号： G01V5/0041 , G01N23/046 , G01T1/2985 , G01V5/005
摘要： Multi-spectral static CT apparatuses are disclosed. The apparatus includes a ray source in a form of multiple distributed spots, multiple columns of detectors, a data acquisition device, an article carrying and control device, and a multi-spectral projection data processing device. An object of the present disclosure is to combine static CT scanning technology with multi-spectral analysis technology. It has an advantage of a static CT system, such as high scanning speed, simple mechanic structure, and/or cost reduction due to omission of slip ring. It also can perform identification of material in an article, and can be widely applied in occasions such as safety inspection, and smuggling suppression at customs.
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公开(公告)号：US09746579B2
公开(公告)日：2017-08-29
申请号：US14576737
申请日：2014-12-19
发明人： Li Zhang , Zhiqiang Chen , Qingping Huang , Xin Jin , Yunda Sun , Le Shen , Ji Zhao
CPC分类号： G01V5/005 , G01N23/046 , G01T7/08 , G06T11/003 , G06T2207/10072 , G06T2211/40
摘要： A CT system and method thereof are disclosed. The system includes: a conveyor mechanism; a first scanning stage configured to scan the object and generate a first digital signal; a second scanning stage spaced from the first scanning stage at a preset distance in a direction of the object's movement; a processing device configured to reconstruct a CT image of the object at a first image quality based on the first digital signal, and analyze the CT image; and a control device configured to adjust a scanning parameter of the second scanning stage based on an analysis result of the processing device to cause the second scanning stage to output a second digital signal. The processing device reconstructs a CT image of the object at a second image quality higher than the first image quality at least based on the second digital signal. The system takes full advantage of the distributed ray sources which replace the normal slip ring technology.
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6.发明申请公开(公告)号：US20140185923A1
公开(公告)日：2014-07-03
申请号：US14136462
申请日：2013-12-20
发明人： Zhiqiang Chen , Li Zhang , Ziran Zhao , Qingping Huang , Qiang Li , Jianping Gu , Yunda Sun
IPC分类号： G06K9/00
CPC分类号： G06T7/596 , G06K9/00201 , G06K9/00523 , G06K9/00536 , G06K9/6215 , G06K9/627 , G06K2209/09 , G06T7/0004 , G06T7/68 , G06T11/008 , G06T2207/10081 , G06T2207/30112 , G06T2211/408
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.
摘要翻译： 用于提取对象的形状特征的方法和安全检查方法和装置。 使用CT可以获得3D结构。 检查行李中的物体的形状被用作可疑物体的特征，与物体的材料属性相结合。 例如，可能会减少检测可疑炸药的误报率。
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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：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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9.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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10.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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