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公开(公告)号:WO2013097768A1
公开(公告)日:2013-07-04
申请号:PCT/CN2012/087849
申请日:2012-12-28
Applicant: 同方威视技术股份有限公司 , 清华大学
IPC: G01T1/22 , G01N23/087
CPC classification number: G01N23/087 , G01N2223/402 , G01N2223/507 , G01T1/22
Abstract: 一种测量物体的有效原子序数的方法和设备,该设备包括:射线源,产生第一能量的第一X射线束和第二能量的第二X射线束;切伦科夫探测器(2),接收透射被检查物体的第一X射线束和第二X射线束,产生第一探测值和第二探测值;数据处理装置,基于第一探测值和第二探测值得到被检查物体的有效原子序数;其中,切伦科夫探测器(2)的光电转换器件( 21)接收切伦科夫光的那个表面大致平行于X射线束的入射方向。由于切伦科夫探测器能够消除特定阈值下的X射线束的影响,所以提高了物质识别的准确度;同时由于所述光电装换部件的特殊安装位置,可以降低或去除核计数器效应。
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公开(公告)号:WO2012088817A1
公开(公告)日:2012-07-05
申请号:PCT/CN2011/074079
申请日:2011-05-16
CPC classification number: G01N27/622
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公开(公告)号:WO2012000298A1
公开(公告)日:2012-01-05
申请号:PCT/CN2010/080369
申请日:2010-12-28
IPC: G01N23/04
CPC classification number: G01V5/0016 , G01N23/046 , G01N23/05 , G01N2223/419 , G01V5/0025
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公开(公告)号:WO2011130896A1
公开(公告)日:2011-10-27
申请号:PCT/CN2010/002174
申请日:2010-12-27
CPC classification number: G01N23/046 , A61B6/4291 , A61B6/484 , G01N2223/419
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公开(公告)号:WO2009135349A1
公开(公告)日:2009-11-12
申请号:PCT/CN2008/002054
申请日:2008-12-24
CPC classification number: G01T1/242 , H01L31/085
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公开(公告)号:WO2009127118A1
公开(公告)日:2009-10-22
申请号:PCT/CN2009/000354
申请日:2009-04-01
CPC classification number: G01V5/005 , G01B15/00 , G01V5/0016 , G03B42/00
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公开(公告)号:WO2009043233A1
公开(公告)日:2009-04-09
申请号:PCT/CN2008/001656
申请日:2008-09-25
Applicant: 清华大学 , 同方威视技术股份有限公司 , 陈志强 , 张丽 , 王学武 , 胡海峰 , 吴宏新 , 李元景 , 刘以农 , 赵自然 , 邢宇翔 , 唐虎 , 易裕民 , 张金宇
IPC: G01N23/04 , G01N23/083
CPC classification number: G01N23/10 , A61B6/027 , G01N23/046 , G01N2001/022 , G01N2223/419 , G01N2223/423 , G01N2223/637 , G01N2223/639 , G01V5/00
Abstract: A method for detecting liquid article by dual energy CT is disclosed. The method comprises the following steps of performing dual energy CT scanning and CT reconstructing of the detected liquid article, obtaining one layer or more layers of CT image having physical property data of the detected liquid article, acquiring the physical property data of each detected liquid article from the CT image through image processing and analysis, and comparing the obtained physical property data with the reference physical property data of the liquid article to estimate the presence of a drug in the detected liquid article. A device for detecting liquid article by dual energy CT is disclosed also. The device comprises a radiation source(10), a detector and data collector(30), a controller(50), a computer data processor(60), the computer data processor(60) includes a device for showing the CT image of a physical property data of the detected liquid article from a projection data reconstructing and a device for estimating whether the detected liquid article is a suspicious article based on the physical property data and the reference physical property data of the liquid article.
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