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1.发明授权Method of and apparatus for measuring center detector index on CT scanner with limited field of view access 有权CT扫描仪测量中心检测器指标的方法和设备，其视野范围有限公开(公告)号：US08411814B2
公开(公告)日：2013-04-02
申请号：US13126608
申请日：2008-10-31
CPC分类号： A61B6/4028 , A61B6/4021 , A61B6/583
摘要： A position of a center detector of a radiation scanner can be determined without shutting down the scanner and/or manually positioning a phantom in the scanning field of the scanner. A phantom, comprising a target, is scanned to create an axial image of the phantom. The target is masked in the axial image, producing a masked axial image of the phantom. The masked axial image is reprojected in projection space, and the axial reprojection is compared to an axial projection or a rebinned axial projection of the phantom that was used to create the axial image. A target axial projection of data related to the masked target, created from the comparison of the axial projection or the rebinned axial projection and the axial reprojection, is used to determine the position of the center detector.
摘要翻译： 可以确定辐射扫描器的中心检测器的位置，而不关闭扫描仪和/或在扫描仪的扫描场中手动放置体模。 扫描包含目标的体模以产生体模的轴向图像。 目标在轴向图像中被掩蔽，产生模仿的被屏蔽的轴向图像。 掩蔽的轴向图像在投影空间中被重新投射，并且将轴向重新投影与用于产生轴向图像的假想的轴向投影或重新组合的轴向投影进行比较。 使用由轴向投影或重新组合的轴向投影和轴向重投影的比较而产生的与被掩蔽的目标相关的数据的目标轴向投影，以确定中心检测器的位置。
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2.发明申请公开(公告)号：US20110206180A1
公开(公告)日：2011-08-25
申请号：US13126608
申请日：2008-10-31
CPC分类号： A61B6/4028 , A61B6/4021 , A61B6/583
摘要： A position of a center detector of a radiation scanner can be determined without shutting down the scanner and/or manually positioning a phantom in the scanning field of the scanner. A phantom, comprising a target, is scanned to create an axial image of the phantom. The target is masked in the axial image, producing a masked axial image of the phantom. The masked axial image is reprojected in projection space, and the axial reprojection is compared to an axial projection or a rebinned axial projection of the phantom that was used to create the axial image. A target axial projection of data related to the masked target, created from the comparison of the axial projection or the rebinned axial projection and the axial reprojection, is used to determine the position of the center detector.
摘要翻译： 可以确定辐射扫描器的中心检测器的位置，而不关闭扫描仪和/或在扫描仪的扫描场中手动放置体模。 扫描包含目标的体模以产生体模的轴向图像。 目标在轴向图像中被掩蔽，产生模仿的被屏蔽的轴向图像。 掩蔽的轴向图像在投影空间中被重新投射，并且将轴向重新投影与用于产生轴向图像的假想的轴向投影或重新组合的轴向投影进行比较。 使用由轴向投影或重新组合的轴向投影和轴向重投影的比较而产生的与被掩蔽的目标相关的数据的目标轴向投影，以确定中心检测器的位置。
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公开(公告)号：US09299001B2
公开(公告)日：2016-03-29
申请号：US13882277
申请日：2010-10-29
CPC分类号： G06K9/46 , G01V5/0008 , G06K9/522 , G06K2209/09
摘要： One or more systems and/or techniques are provided to identify and/or classify objects of interest (e.g., potential granular objects) from a radiographic examination of the object. Image data of the object is transformed using a spectral transformation, such as a Fourier transformation, to generate image data in a spectral domain. Using the image data in the spectral domain, one or more one-dimensional spectral signatures can be generated and features of the signatures can be extracted and compared to features of one or more known objects. If one or more features of the signatures correspond (e.g., within a predetermined tolerance) to the features of a known object to which the feature(s) is compared, the object of interest may be identified and/or classified based upon the correspondence.
摘要翻译： 提供一种或多种系统和/或技术来从对象的射线照相检查中识别和/或分类感兴趣的对象（例如，潜在的粒状物体）。 使用诸如傅里叶变换的频谱变换来变换对象的图像数据，以在频域中生成图像数据。 使用频谱域中的图像数据，可以生成一个或多个一维光谱特征，并且可以提取特征的特征并将其与一个或多个已知对象的特征进行比较。 如果签名的一个或多个特征对应于（例如，在预定的公差内）与特征被比较的已知对象的特征，则可以基于对应来识别和/或分类感兴趣的对象。
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公开(公告)号：US20130216100A1
公开(公告)日：2013-08-22
申请号：US13882277
申请日：2010-10-29
IPC分类号： G06K9/46
CPC分类号： G06K9/46 , G01V5/0008 , G06K9/522 , G06K2209/09
摘要： One or more systems and/or techniques are provided to identify and/or classify objects of interest (e.g., potential granular objects) from a radiographic examination of the object. Image data of the object is transformed using a spectral transformation, such as a Fourier transformation, to generate image data in a spectral domain. Using the image data in the spectral domain, one or more one-dimensional spectral signatures can be generated and features of the signatures can be extracted and compared to features of one or more known objects. If one or more features of the signatures correspond (e.g., within a predetermined tolerance) to the features of a known object to which the feature(s) is compared, the object of interest may be identified and/or classified based upon the correspondence.
摘要翻译： 提供一种或多种系统和/或技术来从对象的射线照相检查中识别和/或分类感兴趣的对象（例如，潜在的粒状物体）。 使用诸如傅里叶变换的频谱变换来变换对象的图像数据，以在频域中生成图像数据。 使用频谱域中的图像数据，可以生成一个或多个一维光谱特征，并且可以提取特征的特征并将其与一个或多个已知对象的特征进行比较。 如果签名的一个或多个特征对应于（例如，在预定的公差内）与特征被比较的已知对象的特征，则可以基于对应来识别和/或分类感兴趣的对象。
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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
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。
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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。
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公开(公告)号：US20140010437A1
公开(公告)日：2014-01-09
申请号：US14006381
申请日：2011-03-22
IPC分类号： G06T7/00
CPC分类号： G06T7/11 , G06K9/00771 , G06K2209/09 , G06T7/155 , G06T2207/10081 , G06T2207/10116 , G06T2207/30112
摘要： Representations of an object 110 in an image generated by an imaging apparatus 100 can comprise one or more potential compound objects 500, where a compound object comprises two or more separate sub-objects. Compound objects can negatively affect the quality of object visualization and/or make identifying threat objects more difficult, for example. Accordingly, as provided herein, a representation of a potential compound object 500 can be examined for separation into sub-objects. To do so, three-dimensional image data of a potential compound object 500 is projected to generate one or more Eigen projections 504, and segmentation is performed on the two-dimensional Eigen projection(s) to identify sub-objects. Once sub-objects are identified, the segmented Eigen projection(s) 900 is back-projected into three-dimensional space 1104 for further processing, for example.
摘要翻译： 由成像装置100生成的图像中的对象110的表示可以包括一个或多个潜在的复合对象500，其中复合对象包括两个或更多个单独的子对象。 例如，复合对象可能会对对象可视化的质量产生负面影响和/或使识别威胁对象变得更加困难。 因此，如本文所提供的，可以检查潜在复合对象500的表示以分离成子对象。 为此，投影潜在复合对象500的三维图像数据以生成一个或多个特征投影504，并且对二维特征投影执行分割以识别子对象。 一旦子对象被识别，则分段的特征投影900被反投影到三维空间1104中以用于进一步处理。
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