WO2020087825A1 - 一种多级能量型静态安检ct系统及成像方法 - Google Patents
一种多级能量型静态安检ct系统及成像方法 Download PDFInfo
- Publication number
- WO2020087825A1 WO2020087825A1 PCT/CN2019/077239 CN2019077239W WO2020087825A1 WO 2020087825 A1 WO2020087825 A1 WO 2020087825A1 CN 2019077239 W CN2019077239 W CN 2019077239W WO 2020087825 A1 WO2020087825 A1 WO 2020087825A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image chain
- detector
- focus
- ray source
- level image
- Prior art date
Links
- 230000003068 static effect Effects 0.000 title claims abstract description 57
- 238000003384 imaging method Methods 0.000 title claims abstract description 31
- 238000007689 inspection Methods 0.000 claims abstract description 19
- 230000009977 dual effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000001228 spectrum Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 2
- 230000002123 temporal effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000002059 diagnostic imaging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000000441 X-ray spectroscopy Methods 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
- G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
- G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
- G01V5/226—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays using tomography
Definitions
- the invention relates to a multi-level energy type static security inspection CT system (hereinafter referred to as a static security inspection CT system), and also relates to an imaging method adopted by the static security inspection CT system, which belongs to the field of radiation imaging technology.
- a static security inspection CT system multi-level energy type static security inspection CT system
- an imaging method adopted by the static security inspection CT system which belongs to the field of radiation imaging technology.
- Existing security inspection CT systems can be divided into two categories, one is a spiral CT system based on slip ring technology, and the other is a static CT system.
- the ray source and detector need to rotate around the measured object, and each component needs to withstand huge centrifugal force during the rotation process, which places high requirements on the design of key components, and the implementation cost and technical difficulty are very high.
- There is no slip ring in the static CT system and there is no rotational movement of the ray source and detector relative to the detected object. It has the characteristics of fast inspection speed, low maintenance cost, and high reliability. It has been highly valued in recent years.
- the existing static CT system still has certain deficiencies in imaging accuracy and imaging speed, and it is difficult to fully meet the requirements of the security inspection site.
- the primary technical problem to be solved by the present invention is to provide a multi-level energy type static security inspection CT system.
- Another technical problem to be solved by the present invention is to provide an imaging method adopted by a multi-level energy type static security CT system.
- a multi-level energy-based static security CT system which includes at least one set of N-level image chain structures, and a luggage conveyor belt is provided inside the bottom of the N-level image chain structure.
- the N-level image chain structure and the luggage conveyor belt are fixed at preset positions by a rack, where N is a positive integer;
- the N-level image chain structures of each group are sequentially arranged in the forward direction of the baggage passage, and the N-level image chain structures of adjacent groups are misaligned.
- the N-level image chain structure of each group is composed of N single-level image chain units
- the single-level image chain units in each group of the N-level image chain structure are sequentially arranged in the forward direction of the baggage aisle, and adjacent single-level image chain units are misaligned.
- each of the single-stage image chain units includes a multi-focus X-ray source and a detector assembly; wherein, among the multiple focal points formed by the multi-focus X-ray source, between adjacent focal points is Either one of equal-distance straight-line arrangement, equal-angle arc arrangement or equal-angle curve arrangement.
- the lines between the two outermost focal points and the virtual rotation center are respectively located in the middle position
- the angle formed by the line from the focal point to the virtual rotation center is not greater than 5 °, and the angle formed by the line between the two outermost focal points and the virtual rotation center is not greater than 10 °.
- the fan angle of the ray beam corresponding to each focal point covers the edge of the luggage passage; and each of the single-stage image chain units
- the equivalent rotation angle formed by the multi-focus X-ray source and the detector assembly is not less than 180 ° + max (theta1, theta2, theta3, ..., thetaM), where max (theta1, theta2, theta3, ..., ThetaM) is to select the largest fan angle among the fan angles at which the beams corresponding to the multiple focal points formed by the multi-focus X-ray source expand.
- the multi-level energy type static security CT system is provided with a gate control switch for controlling the emission / stop emission of each ray tube or ray source of each of the single-stage image chain units.
- the detector assembly includes an arc detector bracket and a plurality of detectors, and the plurality of detectors are arranged on the arc detector bracket centered on the center of the luggage passage, and more The detectors face the middle positions of the multiple focal points of the multi-focus X-ray source.
- the detector is a combination of any one or more of a single energy detector, a dual energy sandwich detector, and a photon counting detector.
- the detector is the single-row detector
- the single-row detector and the focal point of the multi-focus X-ray source share an XY plane
- the single-row detector is directly opposite to the The intermediate position of the multiple focal points of the multi-focus X-ray source
- the detector is the multi-row detector
- the middle-row detector in the multi-row detector and the multiple focal points of the multi-focus X-ray source share an XY plane
- the multi-row detector Directly facing the middle position of the multiple focal points of the multi-focus X-ray source.
- an imaging method is provided, which is implemented by the multi-level energy type static security CT system described above, and includes the following steps:
- Baggage or parcels enter the baggage aisle, and according to the preset timing, control the focus of the multi-focus X-ray source of each single-stage image chain unit to sequentially expose, and collect the baggage or parcels through the corresponding single-stage image chain unit through the corresponding detector components Projection data at time;
- each tomographic image is reconstructed and identified sequentially from the first tomographic image of the baggage or package.
- the static security CT system adopts a plurality of single-level image chain units composed of a multi-focus X-ray source and a detector assembly to form an N-level image chain structure.
- images with higher time resolution and more energy spectrum level than the spiral CT system can be generated, which improves the identification rate of contraband and the speed of luggage inspection.
- the static security CT system has got rid of the dependence on the slip ring, the multi-focus X-ray source and detector do not need to rotate, and realize non-rotation static imaging, thereby reducing maintenance costs and improving equipment stability.
- FIG. 1 is a cross-sectional view of a static security CT system provided by the present invention
- FIG. 2 is an internal structure diagram of a static security CT system provided by the present invention
- FIG. 3 is a structural diagram of an N-level image chain structure in a static security CT system provided by the present invention.
- FIG. 4 is a schematic diagram of the optical path of the adjacent single-stage image chain unit in the static security CT system provided by the present invention.
- FIG. 5 is a schematic diagram of the optical path of a single-stage image link unit in the static security CT system provided by the present invention.
- FIG. 6 is a structural diagram of a single-row detector in a static security CT system provided by the present invention.
- FIG. 7 is a structural diagram of a multi-row detector in a static security CT system provided by the present invention.
- FIG. 8 is a flowchart of an imaging method of a static security CT system provided by the present invention.
- the static security CT system provided by the present invention includes a housing 1 connected in sequence, a shielding curtain 2 at the entrance, and a shielding curtain 7 at the outlet. At least one set of N-level images is provided inside the housing 1
- the chain structure 5 is provided with a luggage conveyor belt 4 on the inner side of the bottom of the N-level image chain structure 5.
- the N-level image chain structure 5 and the luggage conveyor belt 4 are fixed to the preset position of the static security CT system by a rack 8 to facilitate Transfer the checked baggage or parcel 3 to the N-level image chain structure 5 on the baggage conveyor belt 4, complete the projection data collection through the N-level image chain structure 5, and transmit the collected projection data to the computer to generate the checked baggage or Three-dimensional tomographic image of package 3.
- each group of N-level image chain structures 5 is composed of N single-level image chain units.
- N is a positive integer, and the value range is preferably between 10 and 30.
- each group of N-level image chain structures 5 is a 5-level image chain structure composed of 5 single-level image chain units.
- the 5-level image chain structures include: Single-level image chain unit 5-1, single-level image chain unit 5-2, single-level image chain unit 5-3, single-level image chain unit 5-4 and single-level image chain unit 5-5.
- the single-level image chain units in each group of N-level image chain structures 5 are sequentially arranged in the direction of the baggage passage, and are adjacent Single-stage image chain units can be misaligned at the same or different angles, that is, adjacent single-stage image chain units need to be staggered by a certain angle ⁇ (such as single-stage image chain unit 5-1 and single-stage image chain unit 5- Stagger angle between 2).
- the first single-level image chain unit is arranged at the position of 0 °, and the second single-level image chain unit is circumferentially offset from the first single-level image chain unit by an angle ⁇ ,
- the third single-level image chain unit is offset from the second single-level image chain unit by an angle ⁇ in the circumferential direction, and so on.
- the selection of the offset angle ⁇ between adjacent single-level image chain units and the number of single-level image chain units of each group of N-level image chain structures needs to be adjusted according to actual imaging needs.
- each group of N-level image chain structures 5 are sequentially arranged in the direction of the baggage passage, and adjacent groups of N-level image chain structures 5 may be the same or The different angles are misaligned, that is, the adjacent groups of N-level image chain structures 5 need to be offset by a certain angle. Among them, the selection of the offset angle between the adjacent groups of N-level image chain structures 5 and the number of groups of N-level image chain structures needs to be adjusted according to the actual imaging requirements.
- each single-stage image chain unit includes a multi-focus X-ray source 9 and a detector assembly 10.
- the multi-focus X-ray source 9 can be packaged by M ray tubes as a whole ray source. M is a positive integer, and the value range is preferably between 2 and 24.
- the multi-focus X-ray source 9 can also be assembled from multiple small ray sources into one assembly. Among the multiple focal points formed by the multi-focus X-ray source 9, adjacent focal points may be arranged in a straight line at equal intervals, or may be arranged in an equal-angle circular arc or a curved line.
- each single-level image link unit of each group of N-level image chain structures 5 since there is a virtual rotation center in the XY plane between each single-level image link unit of each group of N-level image chain structures 5, the coordinates of the virtual rotation center in the XY plane are (0, 0), each The coordinates of the virtual rotation center of each single-stage image chain unit are the same, that is, the common rotation center.
- the coordinates of the virtual rotation center in the XY plane are (0, 0) as the center coordinates of the arc structure synthesized by each single-level image chain unit of each group of N-level image chain structures 5. Among them, as shown in FIGS.
- the XY plane refers to the direction parallel to the width direction of the luggage conveyor belt 4 as the X axis, and the direction perpendicular to the surface of the luggage conveyor belt 4 as the Y axis to convey the luggage
- the length direction of the belt 4 is taken as the Z axis; the plane composed of the X axis and the Y axis is the XY plane.
- the pixels of the dual-energy interlayer detector can be directly aligned, as described later, the pixels of the low-energy detector and the pixels of the high-energy detector are aligned, so that the low energy
- the imaging data of each pixel of the detector corresponds to the imaging data of each pixel of the high-energy detector.
- the two outermost focal points The angle between the connection line to the virtual rotation center and the connection line between the focal point in the middle position and the virtual rotation center is not more than 5 °, and the connection line between the two outermost focal points and the virtual rotation center The angle formed is not more than 10 °.
- the fan angles of the ray beams corresponding to the different focal points may be different. Respectively corresponding to theta1, theta2, theta3, ... thetaM. Among them, the opening angle of the ray beam corresponding to each focal point covers the edge of the luggage passage to ensure that the X-ray beam emitted by the ray tube or ray source (small ray source) corresponding to each focal point can completely cover the luggage under inspection Or parcel.
- the multi-focus X-ray source 9 and the detector assembly 10 of each single-level image chain unit form a certain angle projection range around the object, in order to ensure that when multi-focus X-ray The source 9 emits a ray beam, and the corresponding detector assembly will receive projection data equivalent to the rotation around the object.
- the equivalent rotation angle formed by the multi-focus X-ray source 9 and detector assembly 10 of each single-stage image chain unit is not less than 180 ° + max (theta1, theta2, theta3, ..., thetaM), so that the equivalent rotation angle formed by the multi-focus X-ray source 9 and the detector assembly satisfies the half-scan data range; max (theta1, theta2, theta3, ..., thetaM) is to select the largest fan angle among the fan angles at which the beams corresponding to the multiple focal points formed by the multi-focus X-ray source 9 expand.
- a grid for controlling each ray tube or ray source (small ray source) of the single-level image chain unit in each group of N-level image chain structures 5 to quickly emit / stop emitting X-ray beams is also provided ⁇ ⁇ Control switch.
- the multi-focus X-rays can be precisely controlled according to the running speed of the luggage conveyor belt 4 in this static security CT system, the number of rows of each detector component in each group of N-level image chain structure 5 and its response time
- the exposure sequence of the different focal points of the ray source 9 (such as focal points 9-1 to 9-3) and the size of the exposure dose.
- the detector assembly 10 includes an arc-shaped detector holder 13 and a plurality of detectors 11, and the plurality of detectors 11 are arranged in a circular-arc detector holder centered on the center of the checked baggage channel (circle center 12) 13 and the multiple detectors are facing the middle position of the multiple focal points of the multi-focus X-ray source.
- the multi-focus X-ray scanning area formed between the multiple detectors (detector 11-1 and detector 11-N) should be large enough to cover the entire luggage passage 15 under inspection.
- the detector 11 may be any one or a combination of a single energy detector, a dual energy sandwich detector, and a photon counting detector.
- a dual-energy interlayer detector which is a high-low energy detector; as shown in FIG. 6, each high-low energy detector consists of a low-energy detector 111 located at the upper layer and a lower-energy detector located at the lower layer.
- High-energy detector 112 when the checked baggage or parcel 3 passes through the baggage conveyor belt 4 from the goods inlet and passes through a group of N-level image chain structure of each single-level image chain unit, each single-level image chain unit will The focus X-ray source 9 emits fan-shaped X-ray beams in time sequence, and the high and low energy detectors of the detector assembly 10 corresponding to each single-stage image chain unit will receive the X-ray beam after attenuation by the cargo. Contains low-energy and high-energy X-ray spectroscopy. The low-energy and high-energy detectors in the detector assembly 10 respectively receive corresponding X-ray signal data and transmit the data to the background computer. Each checked baggage or parcel will receive an N-level image chain The data collected by the structure is processed by a predetermined algorithm to generate a three-dimensional tomographic image of the luggage or package.
- the detectors in the detector assembly 10 may be single-row or multi-row detectors.
- a single-row detector can be selected.
- the single-row detector and the focal point of the multi-focus X-ray source share the XY plane, and the single-row detector is facing the multi-focus X
- the intermediate position of the multiple focal points of the light ray source when the imaging range is large, multiple rows of detector devices can be selected.
- the middle row detector and the multiple focal points of the multi-focus X-ray source in the multi-row detector share the XY plane, and
- the multi-row detector is directly in the middle of the multiple focal points of the multi-focus X-ray source.
- the static security CT system further includes a high-voltage generator 6 for supplying high voltage to each multi-focus X-ray source.
- a high-voltage generator 6 for supplying high voltage to each multi-focus X-ray source.
- the high voltage emitted by the high-voltage generator 6 is controlled so that each multi-focus X-ray
- the ray sources are at different operating voltages, and thus the static security CT system can complete dual-energy imaging, triple-energy imaging or multi-energy imaging.
- the dual-energy sandwich detector can also be used to implement the dual-energy imaging of the static security CT system. For example, the same voltage value is used for the high and low-energy detectors to achieve dual-energy imaging of the static security CT system; Alternatively, a photon counting detector is used as the detector component to realize the multi-energy imaging of the static security inspection CT system.
- the imaging method adopted by the static security CT system provided by the present invention includes the following steps:
- Step S1 Baggage or parcel enters the baggage passage, according to the preset timing, controls the focus of the multi-focus X-ray source of each single-stage image chain unit to be sequentially exposed, and collects the package through the corresponding detector component through each single-stage image chain Projection data for the unit.
- each group of N-level The number of rows of each detector component in the image chain structure 5 and its response time, the exposure of the focal point in the multi-focus X-ray source of each single-stage image chain unit in each group of N-level image chain structures 5 is controlled by a gate control switch The order and the size of the exposure dose.
- the exposure of the focal points in the multi-focus X-ray source of each single-stage image chain unit is successively Sequentially, through the gate control switch, one ray tube or ray source in the multi-focus X-ray source of each single-stage image chain unit can be controlled to emit rays simultaneously.
- the focus in the multi-focus X-ray source of each single-stage image chain unit can be controlled to be sequentially exposed by the gate control switch, and the focus in the multi-focus X-ray source of each single-stage image chain unit is projected to the corresponding after exposure On the detector component of the camera, so as to collect the projection data of the luggage or package passing through each single-stage image chain unit through the corresponding detector component.
- the projection data collected by the detector components of each single-stage image chain unit will be transmitted to the background computer.
- Step S2 When the baggage or package reaches the last single-level image chain unit of each group of N-level image chain structures, the tomographic images are reconstructed and identified sequentially from the first tomographic image of the baggage or package.
- each tomographic image is sequentially passed through the current group of N-level image chain structure by the tomographic position corresponding to the baggage or package After all the single-level image chain units of the, reconstruct the projection data of the fault position collected by each single-level image chain unit to form a tomographic image corresponding to the fault position.
- each single-level image chain unit of the current group of N-level image chain structure has completed the projection data of the fault position of the luggage or package head Acquisition, therefore, the first tomographic image corresponding to the tomographic position of the luggage or parcel head can be reconstructed according to the collected projection data, and the identification program pre-installed by the computer (for example, image recognition commonly used in existing security inspection equipment Procedures, etc.), and based on the attenuation coefficient, electron density, and equivalent atomic number of the first tomographic image, identify the reconstructed first tomographic image to determine whether there are prohibited items in the tomographic image.
- the identification program pre-installed by the computer
- the first tomographic image reconstruction and recognition methods are used to sequentially check the baggage. Or other tomographic images of the package are sequentially reconstructed and identified.
- the background computer can use analytical reconstruction algorithm or iterative reconstruction algorithm to reconstruct each tomographic image of baggage or parcel; the background computer can also use analytical and iterative hybrid reconstruction algorithm to reconstruct each tomographic image of baggage or parcel. .
- the analytical reconstruction algorithm reconstructs each tomographic image of luggage or parcel; for the implementation process of the analytical reconstruction algorithm, please refer to the paper "Optimization Iteration Method of X-ray Dual-energy Computer Tomography Projection Decomposition” (published in “Optics” Journal, 2017, 10: 365-374), Xiangyang, Tang, and others ’paper”
- CB-FBP three-dimensional-weighted cone beam filtered backprojection
- step S2 is used to continue Remaining tomographic images that have not been reconstructed and identified in the package are sequentially reconstructed and identified.
- the static security CT system adopts a plurality of single-level image chain units composed of a multi-focus X-ray source and a detector assembly to form an N-level image chain structure.
- images with higher time resolution and more energy spectrum level than the spiral CT system can be generated, which improves the identification rate of contraband and the speed of luggage inspection.
- the static security CT system has got rid of the dependence on the slip ring, the multi-focus X-ray source and detector do not need to rotate, and realize non-rotation static imaging, thereby reducing maintenance costs and improving equipment stability.
Landscapes
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
Description
Claims (10)
- 一种多级能量型静态安检CT系统,其特征在于包括至少一组N级影像链结构,所述N级影像链结构底部的内侧设置有行李传输带,所述N级影像链结构和所述行李传输带通过机架固定在预设位置上,其中N为正整数;各组所述N级影像链结构在行李通道的前进方向上依次顺序布置,并且,相邻组所述N级影像链结构之间错位布局。
- 如权利要求1所述的多级能量型静态安检CT系统,其特征在于:每组所述N级影像链结构由N个单级影像链单元组成;每组所述N级影像链结构中的各所述单级影像链单元在行李通道的前进方向上依次顺序布置,并且,相邻所述单级影像链单元之间错位布局。
- 如权利要求2所述的多级能量型静态安检CT系统,其特征在于:每个所述单级影像链单元包括多焦点X光射线源和探测器组件;其中,所述多焦点X光射线源所形成的多个焦点中,相邻焦点之间为等间距直线排布、等角度圆弧式排布或者等角度曲线式排布中的任意一种。
- 如权利要求3所述的多级能量型静态安检CT系统,其特征在于:对于同一个所述单级影像链单元,所述多焦点X光射线源所形成的多焦点中,位于最外侧的两个焦点到虚拟旋转中心的连线分别与位于中间位置的焦点到虚拟旋转中心的连线之间所形成的夹角不大于5°,并且,位于最外侧的两个焦点到虚拟旋转中心的连线所形成的夹角不大于10°。
- 如权利要求4所述的多级能量型静态安检CT系统,其特征在于:所述多焦点X光射线源所形成的多个焦点中,与每个焦点对应的射线束张开的扇角覆盖行李通道的边缘;并且,各所述单级影像链单 元的所述多焦点X光射线源和所述探测器组件形成的等效旋转角度不低于180°+max(theta1,theta2,theta3,…,thetaM),其中,max(theta1,theta2,theta3,…,thetaM)为在与所述多焦点X光射线源所形成的多个焦点对应的射线束张开的扇角中选取最大的扇角。
- 如权利要求2所述的多级能量型静态安检CT系统,其特征在于:所述多级能量型静态安检CT系统中设置有用于控制各所述单级影像链单元的射线管或射线源发射/停止发射的栅控开关。
- 如权利要求3所述的多级能量型静态安检CT系统,其特征在于:所述探测器组件包括圆弧形探测器支架和多个探测器,多个所述探测器布置在以行李通道的中心为圆心的所述圆弧探测器支架上,并且多个所述探测器正对所述多焦点X光射线源的多个焦点的中间位置。
- 如权利要求7所述的多级能量型静态安检CT系统,其特征在于:所述探测器为单能探测器、双能夹层探测器、光子计数探测器中任意一种或多种的组合。
- 如权利要求8所述的多级能量型静态安检CT系统,其特征在于:当所述探测器为所述单排探测器时,所述单排探测器与所述多焦点X光射线源的焦点共XY平面,并且所述单排探测器正对所述多焦点X光射线源的多个焦点的中间位置;当所述探测器为所述多排探测器时,所述多排探测器中的中间排探测器与所述多焦点X光射线源的多个焦点共XY平面,并且所述多排探测器正对所述多焦点X光射线源的多个焦点的中间位置。
- 一种成像方法,通过权利要求1~9中任意一项所述的多级能量型静态安检CT系统实现,其特征在于包括如下步骤:行李或包裹进入行李通道,按照预设时序,控制各单级影像链单元的多焦点X光射线源中的焦点依次曝光,并通过对应的探测器组件采集行李或包裹经过各单级影像链单元时的投影数据;当所述行李或包裹到达每组N级影像链结构的最后一个单级影像链单元时,从所述行李或包裹的第一个断层图像开始,依次对各断层图像进行重建和识别。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2019373486A AU2019373486A1 (en) | 2018-10-31 | 2019-03-06 | Multi-energy static security ct system and imaging method |
JP2021523592A JP7352304B2 (ja) | 2018-10-31 | 2019-03-06 | 多段型の固定式安全検査ctシステム及び画像形成方法 |
EP19879454.7A EP3872535A4 (en) | 2018-10-31 | 2019-03-06 | MULTI-ENERGY STATIC SECURITY COMPUTED COMPUTING SYSTEM AND IMAGING PROCESS |
US17/302,320 US11789175B2 (en) | 2018-10-31 | 2021-04-30 | Multi-energy static security CT system and imaging method |
AU2023204307A AU2023204307A1 (en) | 2018-10-31 | 2023-07-04 | Multi-energy static security ct system and imaging method |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201821783336.XU CN209167556U (zh) | 2018-10-31 | 2018-10-31 | 一种多级能量型静态安检ct系统 |
CN201811287240.9 | 2018-10-31 | ||
CN201821783336.X | 2018-10-31 | ||
CN201811287240.9A CN109343135B (zh) | 2018-10-31 | 2018-10-31 | 一种多级能量型静态安检ct系统及成像方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/302,320 Continuation US11789175B2 (en) | 2018-10-31 | 2021-04-30 | Multi-energy static security CT system and imaging method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020087825A1 true WO2020087825A1 (zh) | 2020-05-07 |
Family
ID=70463609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2019/077239 WO2020087825A1 (zh) | 2018-10-31 | 2019-03-06 | 一种多级能量型静态安检ct系统及成像方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US11789175B2 (zh) |
EP (1) | EP3872535A4 (zh) |
JP (1) | JP7352304B2 (zh) |
AU (2) | AU2019373486A1 (zh) |
WO (1) | WO2020087825A1 (zh) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114280087B (zh) * | 2021-12-24 | 2024-04-09 | 北京航星机器制造有限公司 | 一种ct成像系统及成像方法 |
CN114047209B (zh) * | 2021-12-24 | 2024-05-14 | 北京航星机器制造有限公司 | 一种分布式静态ct系统及成像方法 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN203643369U (zh) * | 2013-12-26 | 2014-06-11 | 清华大学 | Ct系统 |
CN203705363U (zh) * | 2013-12-26 | 2014-07-09 | 清华大学 | Ct系统 |
CN203909313U (zh) * | 2013-12-27 | 2014-10-29 | 清华大学 | 多能谱静态ct设备 |
CN104374783A (zh) * | 2013-12-26 | 2015-02-25 | 清华大学 | Ct系统及其方法 |
CN104749197A (zh) * | 2013-12-26 | 2015-07-01 | 清华大学 | Ct系统及其方法 |
CN104749648A (zh) * | 2013-12-27 | 2015-07-01 | 清华大学 | 多能谱静态ct设备 |
CN105361900A (zh) * | 2014-08-26 | 2016-03-02 | 曹红光 | 静态实时ct成像系统及其成像控制方法 |
CN108122723A (zh) * | 2017-12-25 | 2018-06-05 | 北京纳米维景科技有限公司 | 一种弧形多焦点固定阳极栅控射线源 |
CN109343135A (zh) * | 2018-10-31 | 2019-02-15 | 北京纳米维景科技有限公司 | 一种多级能量型静态安检ct系统及成像方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4356964B2 (ja) * | 2001-11-01 | 2009-11-04 | 株式会社日立メディコ | X線ct装置 |
US7106830B2 (en) * | 2002-06-12 | 2006-09-12 | Agilent Technologies, Inc. | 3D x-ray system adapted for high speed scanning of large articles |
US7366282B2 (en) * | 2003-09-15 | 2008-04-29 | Rapiscan Security Products, Inc. | Methods and systems for rapid detection of concealed objects using fluorescence |
JP3111697U (ja) * | 2005-04-20 | 2005-07-28 | 株式会社島津製作所 | X線異物検査装置 |
US7869566B2 (en) * | 2007-06-29 | 2011-01-11 | Morpho Detection, Inc. | Integrated multi-sensor systems for and methods of explosives detection |
JP5345332B2 (ja) * | 2008-03-31 | 2013-11-20 | アンリツ産機システム株式会社 | X線異物検出装置 |
US10016171B2 (en) * | 2014-11-12 | 2018-07-10 | Epica International, Inc. | Radiological imaging device with improved functionality |
-
2019
- 2019-03-06 WO PCT/CN2019/077239 patent/WO2020087825A1/zh unknown
- 2019-03-06 AU AU2019373486A patent/AU2019373486A1/en not_active Abandoned
- 2019-03-06 JP JP2021523592A patent/JP7352304B2/ja active Active
- 2019-03-06 EP EP19879454.7A patent/EP3872535A4/en active Pending
-
2021
- 2021-04-30 US US17/302,320 patent/US11789175B2/en active Active
-
2023
- 2023-07-04 AU AU2023204307A patent/AU2023204307A1/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN203643369U (zh) * | 2013-12-26 | 2014-06-11 | 清华大学 | Ct系统 |
CN203705363U (zh) * | 2013-12-26 | 2014-07-09 | 清华大学 | Ct系统 |
CN104374783A (zh) * | 2013-12-26 | 2015-02-25 | 清华大学 | Ct系统及其方法 |
CN104749197A (zh) * | 2013-12-26 | 2015-07-01 | 清华大学 | Ct系统及其方法 |
CN203909313U (zh) * | 2013-12-27 | 2014-10-29 | 清华大学 | 多能谱静态ct设备 |
CN104749648A (zh) * | 2013-12-27 | 2015-07-01 | 清华大学 | 多能谱静态ct设备 |
CN105361900A (zh) * | 2014-08-26 | 2016-03-02 | 曹红光 | 静态实时ct成像系统及其成像控制方法 |
CN108122723A (zh) * | 2017-12-25 | 2018-06-05 | 北京纳米维景科技有限公司 | 一种弧形多焦点固定阳极栅控射线源 |
CN109343135A (zh) * | 2018-10-31 | 2019-02-15 | 北京纳米维景科技有限公司 | 一种多级能量型静态安检ct系统及成像方法 |
Non-Patent Citations (4)
Title |
---|
LI BAOLEI ET AL.: "Optimized Iterative Method for Projection Decomposition of X-Ray Dual-Energy Computed Tomography", JOURNAL OF OPTICS, vol. 10, 2017, pages 365 - 374 |
MENGFEI LI ET AL., IEEE TRANSACTIONS ON MEDICAL IMAGING, vol. Accurate iterative FBP reconstruction method for m, 2018 |
RUOQIAO ZHANG ET AL.: "Model-Based Iterative Reconstruction for Dual-Energy X-Ray CT Using a Joint Quadratic Likelihood Model", IEEE TRANSACTIONS ON MEDICAL IMAGING, vol. 33, 2014, pages 117 - 134, XP011536086, DOI: 10.1109/TMI.2013.2282370 |
XIANGYANG TANG ET AL.: "A three-dimensional-weighted cone beam filtered backprojection (CB-FBP) algorithm for image reconstruction in volumetric CT-helical scanning", PHYS MED BIO, vol. 51, 2006, pages 855 - 874, XP020096140, DOI: 10.1088/0031-9155/51/4/007 |
Also Published As
Publication number | Publication date |
---|---|
JP2022506294A (ja) | 2022-01-17 |
US11789175B2 (en) | 2023-10-17 |
JP7352304B2 (ja) | 2023-09-28 |
EP3872535A1 (en) | 2021-09-01 |
US20210325563A1 (en) | 2021-10-21 |
AU2023204307A1 (en) | 2023-07-27 |
AU2019373486A1 (en) | 2021-06-17 |
EP3872535A4 (en) | 2021-12-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN109343135B (zh) | 一种多级能量型静态安检ct系统及成像方法 | |
US7924975B2 (en) | Linear track scanning imaging system and method | |
US7499522B2 (en) | Cargo security inspection system and method | |
ES2718884T3 (es) | Sistema de tomografía computarizada para carga y contenedores transportados | |
US9119589B2 (en) | Method and system for spectral computed tomography (CT) with sparse photon counting detectors | |
US9579075B2 (en) | Detector array comprising energy integrating and photon counting cells | |
AU2023204307A1 (en) | Multi-energy static security ct system and imaging method | |
RU2553184C1 (ru) | Компьютерный томограф | |
PT1733213E (pt) | Eliminação de interferências num portal de inspecção por retro dispersão que compreende fontes múltiplas de modo a assegurar que de cada vez só uma fonte emite radiação | |
EP3460531B1 (en) | Scanning imaging system for security inspection of an object and imaging method thereof | |
CN103308535A (zh) | 用于射线扫描成像的设备和方法 | |
CN102446573A (zh) | X射线的混合准直器及其制作方法 | |
JP2010500553A (ja) | 画像データを取得するシステム及び方法 | |
WO1998033076A1 (en) | Radiation imaging using simultaneous emission and transmission | |
US11768163B2 (en) | CT system and detection device for CT system | |
CN209167556U (zh) | 一种多级能量型静态安检ct系统 | |
CN202562861U (zh) | 用于射线扫描成像的设备 | |
CN117368238A (zh) | Ct扫描系统和方法 | |
CN102393528B (zh) | 计算机断层扫描的非对称减少的探测器及其制作方法 | |
US10215879B2 (en) | System for detecting counterfeit goods and method of operating the same | |
KR101665327B1 (ko) | 전산단층촬영장치 및 방법 | |
KR20220048457A (ko) | 전산단층촬영장치, 이의 제조 방법 및 구동 방법 | |
Wu et al. | First demonstration of Compton camera used for X-ray fluorescence imaging | |
Kappler et al. | A full-system simulation chain for computed tomography scanners | |
KR101685005B1 (ko) | 저선량 엑스선 콘빔 ct 영상 장치 및 이를 이용한 영상 생성 방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19879454 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2021523592 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2019879454 Country of ref document: EP Effective date: 20210528 |
|
ENP | Entry into the national phase |
Ref document number: 2019373486 Country of ref document: AU Date of ref document: 20190306 Kind code of ref document: A |