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1. 发明公开

EP4403111A1 BEAM OUTPUT CONTROL METHOD AND APPARATUS FOR OPTICAL MACHINE IN IMAGING SYSTEM, AND CT IMAGING SYSTEM 审中-实审
公开(公告)号：EP4403111A1
公开(公告)日：2024-07-24
申请号：EP22889065.3
申请日：2022-10-11
申请人： Nuctech Company Limited , Tsinghua University
发明人： CHEN, Zhiqiang , ZHANG, Li , SUN, Yunda , ZHAO, Zhenhua , JIN, Xin , SHEN, Le , LIANG, Wuyang
IPC分类号： A61B6/03
CPC分类号： G06T11/005 , G01N23/046 , G01N2223/41920130101
摘要： Provided are a method and a device for controlling an output beam of an X-ray source in an imaging system, a CT imaging system, an electronic apparatus, a storage medium and a program product, which relate to a field of security inspection imaging technology. The method includes: receiving (S210) an encoder signal and an X-ray source output beam signal, and initially synchronizing the encoder signal and the X-ray source output beam signal; recording (S220) a coded value M of the encoder at moment tm, and a coded value N of the encoder at moment tm+1, where each of M, N, and m is an integer; determining (S230) that a duration from the moment tm to the moment tm+1 is an actual output beam time interval T of the X-ray source, when it is determined that a difference value between the coded value M and the coded value N satisfies a preset value a, where a is an integer; determining (S240) a gap time TG in the actual output beam time interval T based on a preset output beam time interval TJ of the imaging system and the actual output beam time interval T; and controlling (S250) the X-ray source not to emit an X-ray beam within the gap time TG. The method solves the problem of sampling image disorder caused by a belt speed fluctuation.

2. 发明公开

EP4400873A1 RADIATION PROTECTION ARRANGEMENT AND SECURITY INSPECTION DEVICE 审中-实审
公开(公告)号：EP4400873A1
公开(公告)日：2024-07-17
申请号：EP22866262.3
申请日：2022-07-22
申请人： Nuctech Company Limited , Tsinghua University
发明人： ZHANG, Li , SUN, Yunda , JIN, Xin , LIANG, Wuyang , CHANG, Ming , SHEN, Le
IPC分类号： G01V5/00 , G21F3/00
CPC分类号： G21F3/00 , G01V5/22
摘要： A radiation protection arrangement, including: a housing (10), the housing (10) including a first port (11) and a second port (12); and a tray (20), the tray (20) having an accommodation space (23). The tray (20) is allowed to pass through a channel (30) within the housing (10). The tray (20) has a first end wall (21), a second end wall (22), and a bottom portion connected between the first end wall (21) and the second end wall (22). A shape of the first end wall (21) and/or a shape of the second end wall (22) are/is configured to fit with an inner wall of the housing (10), so as to block a radiation from leaving the channel (30) from the accommodation space (23) through the second port (12) or the first port (11). Further provided is a security inspection device, including the radiation protection arrangement.

3. 发明公开

EP4393406A1 IMAGING SYSTEM AND METHOD FOR RADIOGRAPHIC EXAMINATION 审中-实审
公开(公告)号：EP4393406A1
公开(公告)日：2024-07-03
申请号：EP22880277.3
申请日：2022-10-10
申请人： Tsinghua University , Nuctech Company Limited
发明人： CHEN, Zhiqiang , ZHANG, Li , JIN, Xin , YANG, Hongkai , XU, Xiaofei , ZHAO, Zhenhua , ZHANG, Siyuan , CHEN, Changyu
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/4014 , A61B6/54 , G06V2201/0320220101 , G06V2201/1220220101
摘要： The present disclosure relates to an imaging system and method for radiographic inspection. The imaging system for radiographic inspection includes an inspection area including an imaging area; a first ray source assembly, all the first target spots of which are arranged in a first ray source plane; a first detector assembly, the plurality of first detector units of which are arranged in a detector plane, the detector plane and the first ray source plane are spaced apart from each other in a travelling direction of the object under inspection with a predetermined distance; and a ray source control device, configured such that when the region of interest of the object under inspection is at least partially located in the imaging area, the first ray source assembly emits X-rays simultaneously from at least two first target spots to the imaging area at the same time, wherein among the at least two first target spots of the first ray source assembly that simultaneously emit X-rays to the imaging area, a ray emission range of each first target spot can cover the imaging area, and the first detector crystals corresponding to the ray emission ranges of any two first target spots do not coincide with each other.

4. 发明公开

EP4369060A1 RAY SCANNING DEVICE 审中-实审
公开(公告)号：EP4369060A1
公开(公告)日：2024-05-15
申请号：EP22837024.3
申请日：2022-07-07
申请人： Nuctech Company Limited , Tsinghua University
发明人： CHEN, Zhiqiang , ZHANG, Li , HUANG, Qingping , ZHOU, Yong , ZHAO, Zhenhua , DING, Hui , JIN, Xin , JI, Chao
IPC分类号： G01V5/00 , G01N23/046
摘要： Embodiments of the present application provide a ray scanning device, comprising: a conveying apparatus, which transports an object to be detected through a scanning region of the ray scanning device; a ray source, which comprises a plurality of ray source modules, each ray source module comprising at least one ray source point that emits ray beams; and a detector, which is used for detecting rays transmitted through the object during scanning and which comprises a plurality of detector groups.

5. 发明公开

EP4368977A1 INSPECTION SYSTEM AND METHOD 审中-实审
公开(公告)号：EP4368977A1
公开(公告)日：2024-05-15
申请号：EP22836963.3
申请日：2022-07-06
申请人： Nuctech Company Limited , Tsinghua University
发明人： ZHANG, Li , CHEN, Zhiqiang , HUANG, Qingping , DING, Hui , ZHOU, Yong , JIN, Xin , YAO, Liming
IPC分类号： G01N23/04
CPC分类号： G01V5/00 , G01N23/046 , G01N23/04
摘要： An inspection system, including: a carrying device (300); at least one ray source (100) and a detector assembly (200). The at least one ray source (100) is rotatable between a plurality of scanning positions around a rotation axis (AX) relative to the carrying device (300). The at least one ray source (100) and the detector assembly (200) may be lifted or lowered along the rotation axis (AX) relative to the carrying device (300). When the at least one ray source (100) is located at one of scanning positions relative to the carrying device (300), the at least one ray source (100) and the detector assembly (200) are lifted or lowered along the rotation axis (AX) relative to the carrying device (300) and the at least one ray source (100) emits X-rays. After the at least one ray source (100) and the detector assembly (200) are lifted or lowered a predetermined distance relative to the carrying device (300), the at least one ray source (100) rotates around the rotation axis (AX) relative to the carrying device (300) to another one of scanning positions. The inspection system further reconstructs a three-dimensional scanning image of the object (10) to be inspected based on detection data of the detector assembly (200).

6. 发明授权

EP2749873B1 CT SYSTEM AND DETECTION DEVICE FOR CT SYSTEM 有权
标题翻译： CT系统的CT系统及检测装置
公开(公告)号：EP2749873B1
公开(公告)日：2018-02-21
申请号：EP13840115.3
申请日：2013-07-15
申请人： Nuctech Company Limited , Tsinghua University
发明人： ZHANG, Li , CHEN, Zhiqiang , HUANG, Qingping , SUN, Yunda , JIN, Xin , SHEN, Le , XING, Yuxiang , TANG, Hu , LI, Yuanjing , HONG, Mingzhi , LIANG, Jinning , REN, Qianlu , LI, Liang , DING, Hui , CHANG, Ming
IPC分类号： G01N23/04 , G01T1/20
CPC分类号： A61B6/482 , A61B6/0457 , A61B6/4241 , A61B6/542 , G01N23/046 , G01N2223/419 , G01N2223/643 , G01T1/242 , G01V5/0041 , H01L27/14601 , H01L27/14634 , H01L27/14658 , H01L27/14676 , H01L27/14806 , H01L27/14812
摘要： A detection device for a CT system comprises a low-energy detector assembly; and a high-energy detector assembly disposed under the low-energy detector assembly. The high-energy detector assembly comprises: a plurality of rows of high-energy detectors arranged at predetermined intervals. With the detection device, detectors and data acquisition units are greatly reduced. A high-resolution three-dimensional CT image is acquired while high-accuracy hazardous article alarm is achieved. The cost of manufacture of the system is greatly decreased while high system performance is ensured.

7. 发明公开

EP4369057A1 INSPECTION SYSTEM AND METHOD 审中-实审
公开(公告)号：EP4369057A1
公开(公告)日：2024-05-15
申请号：EP22836956.7
申请日：2022-07-06
申请人： Tsinghua University , Nuctech Company Limited
发明人： CHEN, Zhiqiang , ZHANG, Li , HUANG, Qingping , ZHOU, Yong , DING, Hui , JIN, Xin , JI, Chao
IPC分类号： G01V5/00
摘要： An inspection system, including: a ray source (100) rotatable between at least two scanning positions around a rotation axis, where a rotation angle of the ray source (100) between two adjacent scanning positions is greater than an angle of adjacent target spots of the ray source (100) relative to the rotation axis; a detector assembly (200); and a conveying device (300) for carrying an object to be inspected (10). The ray source (100) and the detector assembly (200) are movable in a traveling direction relative to the conveying device (300) so that the object to be inspected (10) enters an inspection region. When the ray source (100) is located at one of the plurality of scanning positions, the ray source (100) and the detector assembly (200) move in the traveling direction relative to the conveying device (300) and the ray source (100) emits X-rays; and when the ray source (100) and the detector assembly (200) move a predetermined distance in the traveling direction relative to the conveying device (300), the ray source (100) rotates around the rotation axis to another one of the plurality of scanning positions.

8. 发明公开

EP4369055A1 RAY SCANNING DEVICE 审中-实审
公开(公告)号：EP4369055A1
公开(公告)日：2024-05-15
申请号：EP22836830.4
申请日：2022-07-01
申请人： Nuctech Company Limited , Tsinghua University
发明人： CHEN, Zhiqiang , ZHANG, Li , HUANG, Qingping , JIN, Xin , DING, Hui , ZHOU, Yong , HU, Baoyuan , ZHAO, Zhenhua
IPC分类号： G01V5/00
摘要： A ray scanning device, comprising: a conveying apparatus (1), conveying an object to be detected (6) to pass through a scanning region of the ray scanning device; a ray source (3), comprising multiple ray source modules (31, 32, 33, 34), each ray source module (31, 32, 33, 34) comprising at least one ray source point emitting a ray beam, and the multiple ray source modules (31, 32, 33, 34) being arranged around the scanning region above the conveying device (1) and secured in a plane perpendicular to a conveying direction of the object to be detected (6); and a detector (4), used to detect rays transmitted through the object to be detected (6) during a scanning period, and comprising multiple detector sets (41, 42, 43, 44), end portions of the multiple detector sets (41, 42, 43, 44) being connected to each other so as to surround the scanning region, and the multiple detector sets (41, 42, 43, 44) being secured in a plane perpendicular to the conveying direction of the object to be detected (6), the detector (4) being located between the ray source (3) and the scanning region along a direction perpendicular to the conveying direction of the object to be detected (6), the ray source (3) and the detectors (4) being arranged to at least partially overlap along the conveying direction of the object to be detected (6), and the multiple ray source modules (31, 32, 33, 34) being detached and mounted independently of each other.

9. 发明公开

EP4345509A1 INSPECTION SYSTEM AND METHOD 审中-实审
公开(公告)号：EP4345509A1
公开(公告)日：2024-04-03
申请号：EP22836960.9
申请日：2022-07-06
申请人： Nuctech Company Limited , Tsinghua University
发明人： ZHANG, Li , CHEN, Zhiqiang , HUANG, Qingping , DING, Hui , ZHOU, Yong , JIN, Xin , YAO, Liming
IPC分类号： G01V5/00
摘要： An inspection system, including: a carrying device (300), at least one ray source (100), where each ray source (100) includes a separate housing (110) to define a vacuum space and a plurality of target spots (120) enclosed within the housing (110); and a detector assembly (200). The at least one ray source (100) and the detector assembly (200) are lifted or lowered along a central axis of the carrying device (300) relative to the carrying device (300). When viewed along the central axis, the at least one ray source (100) is translatable between a plurality of scanning positions relative to the carrying device (300). When the at least one ray source (100) is at one of the scanning positions relative to the carrying device (300), the at least one ray source (100) and the detector assembly (200) are lifted or lowered relative to the carrying device (300) along the central axis, and the at least one ray source (100) emits X-rays; and when the at least one ray source (100) and the detector assembly (200) are lifted or lowered a predetermined distance relative to the carrying device, the at least one ray source (100) translates to another one of the scanning positions relative to the carrying device (300).

10. 发明公开

EP3460531A1 SCANNING IMAGING SYSTEM FOR SECURITY INSPECTION OF AN OBJECT AND IMAGING METHOD THEREOF 有权
公开(公告)号：EP3460531A1
公开(公告)日：2019-03-27
申请号：EP18178449.7
申请日：2018-06-19
申请人： Nuctech Company Limited , Tsinghua University
发明人： ZHANG, Li , CHEN, Zhiqiang , SHEN, Le , HUANG, Qingping , SUN, Yunda , JIN, Xin , DING, Hui , XING, Yuxiang
IPC分类号： G01V5/00
摘要： A scanning imaging system for security inspection of an object and an imaging method thereof are disclosed, the system comprising: a conveying unit (101) configured for bringing the object to move along a conveying direction; a plurality of radiographic sources (102) at one side of the conveying unit, being arranged successively in a direction vertical to a plane, in which the conveying unit is located, configured for alternately emitting ray beams to form a scanning area; a linear detector array (103) at the other side of the conveying unit, being configured for detecting first projection images, which are formed after the ray beams emitted by the plurality of radiographic sources penetrate through the object, in the process of the object passing through the scanning area; an imaging unit configured for obtaining a first reconstructed image of the object based on the first projection images of the plurality of radiographic sources.

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