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    Radiation modulation in a security examination apparatus
    1.
    发明授权
    Radiation modulation in a security examination apparatus 有权
    安全检查装置中的辐射调制

    公开(公告)号：US09121957B2

    公开(公告)日：2015-09-01

    申请号：US13123833

    申请日：2008-10-14

    申请人： Ram C. Naidu ,  Chitra Subramanian ,  Sergey B. Simanovsky ,  Zhengrong Ying ,  Dong-Yueh Liang ,  Douglas Q. Abraham

    发明人： Ram C. Naidu ,  Chitra Subramanian ,  Sergey B. Simanovsky ,  Zhengrong Ying ,  Dong-Yueh Liang ,  Douglas Q. Abraham

    IPC分类号： G01V5/00

    CPC分类号： G01V5/0041 ,  G01V5/0016 ,  G01V5/005

    摘要： Radiation flux can be adjusted “on the fly” as an object (204) is being scanned in a security examination apparatus. Adjustments are made to the radiation flux based upon radiation incident on a first radiation detector (226) in an upstream portion (233) of an examination region. The object under examination is thus exposed to different radiation flux in coordination with a downstream motion (235) of the object relative to a second radiation detector (228). The radiation flux is adjusted so that a sufficient number of x-rays (that traverse the object) are incident on the second radiation detector. Images of the object can then be generated based upon data from the second radiation detector, where these images are thus of a desired/higher quality.

    摘要翻译： 随着物体（204）在安全检查装置中被扫描，可以“飞行地”调整辐射通量。 基于入射到检查区域的上游部分（233）中的第一辐射检测器（226）上的辐射对辐射通量进行调整。 因此，被检查物体与物体相对于第二辐射检测器（228）的下游运动（235）协调地暴露于不同的辐射通量。 调整辐射通量使得足够数量的X射线（穿过物体）入射到第二辐射探测器上。 然后可以基于来自第二辐射检测器的数据生成对象的图像，其中这些图像因此具有期望/更高质量。

    RADIATION MODULATION IN A SECURITY EXAMINATION APPARATUS
    2.
    发明申请
    RADIATION MODULATION IN A SECURITY EXAMINATION APPARATUS 有权
    安全检查装置的辐射调制

    公开(公告)号：US20110200167A1

    公开(公告)日：2011-08-18

    申请号：US13123833

    申请日：2008-10-14

    申请人： Ram C. Naidu ,  Chitra Subramanian ,  Sergey B. Simanovsky ,  Zhengrong Ying ,  Dong-Yueh Liang ,  Douglas Q. Abraham

    发明人： Ram C. Naidu ,  Chitra Subramanian ,  Sergey B. Simanovsky ,  Zhengrong Ying ,  Dong-Yueh Liang ,  Douglas Q. Abraham

    IPC分类号： G01N23/04 ,  G01N23/00 ,  H05G1/10

    CPC分类号： G01V5/0041 ,  G01V5/0016 ,  G01V5/005

    摘要： Radiation flux can be adjusted “on the fly” as an object (204) is being scanned in a security examination apparatus. Adjustments are made to the radiation flux based upon radiation incident on a first radiation detector (226) in an upstream portion (233) of an examination region. The object under examination is thus exposed to different radiation flux in coordination with a downstream motion (235) of the object relative to a second radiation detector (228). The radiation flux is adjusted so that a sufficient number of x-rays (that traverse the object) are incident on the second radiation detector. Images of the object can then be generated based upon data from the second radiation detector, where these images are thus of a desired/higher quality.

    摘要翻译： 随着物体（204）在安全检查装置中被扫描，可以“飞行地”调整辐射通量。 基于入射到检查区域的上游部分（233）中的第一辐射检测器（226）上的辐射对辐射通量进行调整。 因此，被检查物体与物体相对于第二辐射检测器（228）的下游运动（235）协调地暴露于不同的辐射通量。 调整辐射通量使得足够数量的X射线（穿过物体）入射到第二辐射探测器上。 然后可以基于来自第二辐射检测器的数据生成对象的图像，其中这些图像因此具有期望/更高质量。

    Method of and system for X-ray spectral correction in multi-energy computed tomography
    4.
    发明申请
    Method of and system for X-ray spectral correction in multi-energy computed tomography 有权
    多能计算机断层扫描中X射线光谱校正的方法和系统

    公开(公告)号：US20060023844A1

    公开(公告)日：2006-02-02

    申请号：US10899775

    申请日：2004-07-27

    申请人： Ram Naidu ,  Zhengrong Ying ,  Chitra Subramanian ,  Sergey Simanovsky ,  Carl Crawford

    发明人： Ram Naidu ,  Zhengrong Ying ,  Chitra Subramanian ,  Sergey Simanovsky ,  Carl Crawford

    IPC分类号： H05G1/00

    CPC分类号： G01N23/046 ,  G01N2223/419 ,  G01T1/185

    摘要： A method of and a system for spectral correction in multi-energy computed tomography are provided to correct reconstructed images, including high-energy CT images and Z (effective atomic number) images, for spectral variations, which include time variations on a scanner due to HVPS drift and scanner to scanner variations due to the beamline component differences. The method uses a copper filter mounted on the detector array for tracking the spectral changes. The method comprises: generating copper ratios; computing working air tables; calculating scales and offsets; and correcting high-energy CT images and Z images using calculated scales and offsets. The method further includes an off-line calibration procedure to generate necessary parameters for the online correction.

    摘要翻译： 提供了一种用于多能量计算机断层摄影中的光谱校正的方法和系统，用于校正重建图像，包括高能CT图像和Z（有效原子序数）图像，用于光谱变化，包括扫描仪上的时间变化，由于 HVPS漂移和扫描仪由于束线分量差异而导致扫描仪变化。 该方法使用安装在检测器阵列上的铜过滤器来跟踪光谱变化。 该方法包括：产生铜比; 计算工作台面; 计算比例和偏移量; 并使用计算的比例和偏移校正高能CT图像和Z图像。 该方法还包括离线校准程序以产生用于在线校正的必要参数。

    Method of and system for X-ray spectral correction in multi-energy computed tomography
    5.
    发明授权
    Method of and system for X-ray spectral correction in multi-energy computed tomography 有权
    多能计算机断层扫描中X射线光谱校正的方法和系统

    公开(公告)号：US07224763B2

    公开(公告)日：2007-05-29

    申请号：US10899775

    申请日：2004-07-27

    申请人： Ram Naidu ,  Zhengrong Ying ,  Chitra Subramanian ,  Sergey Simanovsky ,  Carl R. Crawford

    发明人： Ram Naidu ,  Zhengrong Ying ,  Chitra Subramanian ,  Sergey Simanovsky ,  Carl R. Crawford

    IPC分类号： G01N23/00

    CPC分类号： G01N23/046 ,  G01N2223/419 ,  G01T1/185

    摘要： A method of and a system for spectral correction in multi-energy computed tomography are provided to correct reconstructed images, including high-energy CT images and Z (effective atomic number) images, for spectral variations, which include time variations on a scanner due to HVPS drift and scanner to scanner variations due to the beamline component differences. The method uses a copper filter mounted on the detector array for tracking the spectral changes. The method comprises: generating copper ratios; computing working air tables; calculating scales and offsets; and correcting high-energy CT images and Z images using calculated scales and offsets. The method further includes an off-line calibration procedure to generate necessary parameters for the online correction.

    摘要翻译： 提供了一种用于多能量计算机断层摄影中的光谱校正的方法和系统，用于校正重建图像，包括高能CT图像和Z（有效原子序数）图像，用于光谱变化，包括扫描仪上的时间变化，由于 HVPS漂移和扫描仪由于束线分量差异而导致扫描仪变化。 该方法使用安装在检测器阵列上的铜过滤器来跟踪光谱变化。 该方法包括：产生铜比; 计算工作台面; 计算比例和偏移量; 并使用计算的比例和偏移校正高能CT图像和Z图像。 该方法还包括离线校准程序以产生用于在线校正的必要参数。

    DETECTING CONCEALED THREATS
    7.
    发明申请
    DETECTING CONCEALED THREATS 有权
    检测隐蔽的威胁

    公开(公告)号：US20110206240A1

    公开(公告)日：2011-08-25

    申请号：US13126622

    申请日：2008-10-30

    申请人： Baoming Hong ,  Julia Pavlovich ,  David Schafer ,  Zhengrong Ying

    发明人： Baoming Hong ,  Julia Pavlovich ,  David Schafer ,  Zhengrong Ying

    IPC分类号： G06K9/00

    CPC分类号： G06K9/00771 ,  G06K9/6247 ,  G06K2209/09

    摘要： Potential threat items may be concealed inside objects, such as portable electronic devices, that are subject to imaging for example, at a security checkpoint. Data from an imaged object can be compared to pre-determined object data to determine a class for the imaged object. Further, an object can be identified inside a container (e.g., a laptop inside luggage). One-dimensional Eigen projections can be used to partition the imaged object into partitions, and feature vectors from the partitions and the object image data can be used to generate layout feature vectors. One or more layout feature vectors can be compared to training data for threat versus non-threat-containing items from the imaged object's class to determine if the imaged object contains a potential threat item.

    摘要翻译： 潜在威胁物品可能隐藏在诸如便携式电子设备的物体内，例如在安全检查点进行成像。 来自成像对象的数据可以与预定对象数据进行比较，以确定成像对象的类。 此外，可以在容器（例如，行李箱内的膝上型计算机）内识别物体。 可以使用一维特征投影来将成像对象分割成分区，并且来自分区和对象图像数据的特征向量可用于生成布局特征向量。 可以将一个或多个布局特征向量与来自成像对象的类的威胁与不包含威胁的项目的训练数据进行比较，以确定成像对象是否包含潜在的威胁项目。

    Method of and system for splitting compound objects in multi-energy computed tomography images
    8.
    发明授权
    Method of and system for splitting compound objects in multi-energy computed tomography images 有权
    在多能计算机断层摄影图像中分割复合物体的方法和系统

    公开(公告)号：US07539337B2

    公开(公告)日：2009-05-26

    申请号：US11183378

    申请日：2005-07-18

    申请人： Sergey Simanovsky ,  Zhengrong Ying ,  Carl R. Crawford

    发明人： Sergey Simanovsky ,  Zhengrong Ying ,  Carl R. Crawford

    IPC分类号： G06K9/00

    CPC分类号： G06K9/00771 ,  G01T1/2985 ,  G01V5/0041 ,  G01V5/005 ,  G06K9/6219

    摘要： A method of and a system for splitting a compound object using multi-energy CT data including a density and an atomic number measurements are provided. The method comprises: compound object detection; computing a two-dimensional DZ distribution of a compound object; identifying clusters within the DZ distribution; assigning a component label to each object voxel based on the DZ distribution clusters; and post-processing the set of voxels identified as belonging to each component.

    摘要翻译： 提供了使用包括密度和原子序数测量的多能量CT数据来分割复合对象的方法和系统。 该方法包括：复合物体检测; 计算复合对象的二维DZ分布; 识别DZ分布中的簇; 基于DZ分布集群为每个对象体素分配一个组件标签; 并且后处理被识别为属于每个组件的一组体素。

    Method of and system for sharp object detection using computed tomography images
    9.
    发明授权
    Method of and system for sharp object detection using computed tomography images 有权
    使用计算机断层摄影图像进行尖锐物体检测的方法和系统

    公开(公告)号：US07302083B2

    公开(公告)日：2007-11-27

    申请号：US10883199

    申请日：2004-07-01

    申请人： Gregory L. Larson ,  Sergey Simanovsky ,  Zhengrong Ying ,  Carl R. Crawford

    发明人： Gregory L. Larson ,  Sergey Simanovsky ,  Zhengrong Ying ,  Carl R. Crawford

    IPC分类号： G06K9/00 ,  G01N23/04

    CPC分类号： G06T7/0004 ,  G06T2207/10081 ,  G06T2207/30112

    摘要： A method of and a system for sharp object detection using computed tomography images are provided. The method comprises identifying voxels corresponding to individual objects; performing eigen-analysis and generating eigen-projection of an identified object; computing an axial concavity ratio of the identified object; computing a pointness measurement of the identified object; computing a flat area of the identified object; calculating a sharpness score of the identified object; and declaring the identified object as a threat if the sharpness score is greater than a pre-defined threshold.

    摘要翻译： 提供了使用计算机断层摄影图像进行尖锐物体检测的方法和系统。 该方法包括识别与各个对象相对应的体素; 执行特征分析并产生识别对象的特征投影; 计算所识别的物体的轴向凹度比; 计算所识别对象的点测量; 计算所识别对象的平坦区域; 计算识别对象的锐度得分; 并且如果清晰度得分大于预定义的阈值，则将所识别的对象声明为威胁。

    Method of and system for computing effective atomic number images in multi-energy computed tomography
    10.
    发明授权
    Method of and system for computing effective atomic number images in multi-energy computed tomography 有权
    在多能计算机断层扫描中计算有效原子序数图像的方法和系统

    公开(公告)号：US07190757B2

    公开(公告)日：2007-03-13

    申请号：US10850910

    申请日：2004-05-21

    申请人： Zhengrong Ying ,  Ram Naidu ,  Sergey Simanovsky ,  Carl R. Crawford

    发明人： Zhengrong Ying ,  Ram Naidu ,  Sergey Simanovsky ,  Carl R. Crawford

    IPC分类号： A61B6/00

    CPC分类号： G01N23/046 ,  G01N2223/419

    摘要： A method of and a system for computing Z (effective atomic number) images from projection data are provided, wherein the projections are acquired using at least two x-ray spectra for a set of scanned objects, including a set of low energy projections and a set of high energy projections; the method comprises decomposing the low energy projections and high energy projections into photoelectric projections, reconstructing the photoelectric projections into photoelectric images, reconstructing one of the two sets of projections into CT images, and computing Z images from the CT images and the photoelectric images with parameters obtained from a calibration procedure.

    摘要翻译： 提供了一种用于从投影数据计算Z（有效原子序号）图像的方法和系统，其中使用用于一组扫描对象的至少两个X射线光谱来获取投影，包括一组低能量投影和 一套高能量投影; 该方法包括将低能量投影和高能量投影分解为光电投影，将光电投影重建为光电图像，将两组投影中的一个重建为CT图像，并从CT图像和光电图像中计算Z图像 从校准程序获得。