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41.发明申请公开(公告)号：US20100172464A1
公开(公告)日：2010-07-08
申请号：US12349893
申请日：2009-01-07
CPC分类号： G21K1/10 , A61B6/032 , A61B6/4021 , A61B6/4028 , A61B6/4035 , A61B6/4241 , A61B6/482
摘要： The disclosed CT scanner comprises at least one source of X-rays; a detector array comprising a plurality of detectors; and an X-ray filter mask arrangement disposed between the source of X-rays and detector array so as to modify the spectra of the X-rays transmitted from the source through the mask to at least some of the detectors so that the X-ray spectra detected by at least one set of detectors is different from the X-ray spectra detected by at least one other set of detectors.
摘要翻译： 所公开的CT扫描器包括至少一个X射线源; 包括多个检测器的检测器阵列; 以及设置在X射线源和检测器阵列之间的X射线滤波器掩模布置，以便将从源通过掩模传输的X射线的光谱修改到至少一些检测器，使得X射线 由至少一组检测器检测的光谱与由至少另一组检测器检测的X射线光谱不同。
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42.发明申请公开(公告)号：US20150139491A1
公开(公告)日：2015-05-21
申请号：US14408283
申请日：2012-06-29
申请人： Sergey Simanovsky , Ram Naidu
发明人： Sergey Simanovsky , Ram Naidu
CPC分类号： G06T7/0006 , G01N23/046 , G01V5/005 , G06T7/0004 , G06T7/0012 , G06T7/11 , G06T7/136 , G06T2207/10081 , G06T2207/30112
摘要： Among other things, one or more systems and/or techniques for identifying an occlusion region in an image representative of an object subjected to examination is provided for herein. Such systems and/or techniques may find particular application in the context of object recognition analysis. An image is generated of the object and an orientation of the object is determined from the image. Based upon the determined orientation of the object relative to the direction the object is translated during examination, one or more parameters utilized for segmenting a second image of the object, identifying features in the image, and/or determining if the image comprises an occlusion region may be adjusted. In this way, the parameters utilized may be a function of the determined orientation of the object, which may mitigate false positives of detected occlusion regions.
摘要翻译： 除此之外，还提供了一种或多种用于识别代表检查对象的图像中的遮挡区域的系统和/或技术。 这样的系统和/或技术可以在对象识别分析的上下文中找到特定的应用。 生成对象的图像，并根据图像确定对象的方位。 基于物体在检查期间相对于物体被转换的方向的确定的取向，用于分割对象的第二图像的一个或多个参数，识别图像中的特征，和/或确定图像是否包括遮挡区域 可以调整。 以这种方式，所使用的参数可以是所确定的物体取向的函数，其可以减轻检测到的遮挡区域的误报。
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公开(公告)号：US20120087481A1
公开(公告)日：2012-04-12
申请号：US13376715
申请日：2009-06-12
IPC分类号： G01D18/00
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4007 , A61B6/4035 , A61B6/482 , A61B6/583 , G06T11/005 , G06T2211/408
摘要： The techniques described herein provide for correcting projection data that comprises contamination due to source switching in a multi energy scanner. The correction is a multi-neighbor correction. That is, it uses data from at least two other views of an object (e.g., generally a previous view and a subsequent view) to correct a current view of the object. The multi-neighbor correction may use one or more correction factors to determine how much data from the other two views to use to correct the current view. The correction factor(s) are determined based upon a calibration that utilizes image space data and/or projection space data of a phantom. In this way, the correction factor(s) account for source leakage that occurs in multi energy scanners.
摘要翻译： 本文描述的技术提供用于校正投影数据，其包括由于多能量扫描器中的源切换引起的污染。 校正是多邻居校正。 也就是说，它使用来自对象的至少两个其他视图的数据（例如，通常为先前视图和后续视图）来校正对象的当前视图。 多邻居校正可以使用一个或多个校正因子来确定来自用于校正当前视图的另外两个视图的数据量。 基于利用幻影的图像空间数据和/或投影空间数据的校准来确定校正因子。 以这种方式，校正因子考虑到在多能量扫描仪中发生的源泄漏。
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44.发明申请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：US20070014471A1
公开(公告)日：2007-01-18
申请号：US11183378
申请日：2005-07-18
申请人： Sergey Simanovsky , Zhengrong Ying , Carl Crawford
发明人： Sergey Simanovsky , Zhengrong Ying , Carl Crawford
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。
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45.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
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。
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46.发明申请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：US20050259781A1
公开(公告)日：2005-11-24
申请号：US10850910
申请日：2004-05-21
申请人： Zhengrong Ying , Ram Naidu , Sergey Simanovsky , Carl Crawford
发明人： Zhengrong Ying , Ram Naidu , Sergey Simanovsky , Carl Crawford
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。
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公开(公告)号：US08995610B2
公开(公告)日：2015-03-31
申请号：US13060778
申请日：2008-09-10
申请人： Zhengrong Ying , Sergey Simanovsky , Ram Naidu , Sorin Marcovici
发明人： Zhengrong Ying , Sergey Simanovsky , Ram Naidu , Sorin Marcovici
CPC分类号： G01N23/046 , A61B6/027 , A61B6/032 , A61B6/4007 , A61B6/4028 , A61B6/405 , A61B6/466 , A61B6/482 , G01N2223/419 , G01T7/08 , G01V5/005
摘要： A CT scanning system may include a multi-pixel x-ray source, and a detector array. The multi-pixel x-ray source may have a plurality of pixels that are disposed along a z-axis, and that are sequentially activated so as to controllably emit x-rays in response to incident electrons. The detector array may have one or more rows of x-ray detectors that detect the x-rays that are emitted from the pixels and have traversed an object, and generate data for CT image reconstruction system. In third generation CT scanning systems, the number of detector rows may be reduced. Multi-pixel x-ray source implementation of saddle curve geometry may render a single rotation single organ scan feasible. Using a multi-pixel x-ray source in stationary CT scanning systems may allow x-ray beam design with a minimal coverage to satisfy mathematical requirements for reconstruction.
摘要翻译： CT扫描系统可以包括多像素x射线源和检测器阵列。 多像素x射线源可以具有沿着z轴设置的多个像素，并且被依次激活以响应入射电子可控地发射x射线。 检测器阵列可以具有一行或多行x射线检测器，其检测从像素发射并穿过物体的X射线，并生成CT图像重建系统的数据。 在第三代CT扫描系统中，可以减少检测器行的数量。 鞍形曲线几何的多像素x射线源实现可能使单次旋转单一器官扫描成为可能。 在固定CT扫描系统中使用多像素X射线源可以允许具有最小覆盖的x射线束设计以满足重建的数学要求。
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公开(公告)号：US08639007B2
公开(公告)日：2014-01-28
申请号：US13393046
申请日：2009-08-28
申请人： Ram Naidu , Sergey Simanovsky
发明人： Ram Naidu , Sergey Simanovsky
CPC分类号： G06T11/005 , A61B6/027
摘要： Techniques and/or systems for generating a two-dimensional projection image of an object under examination from helical data are provided herein. An image plane and a distance, or height, of an examination line lying in a plane parallel to the image plane may be selected with or without user input. Using the selected image plane and examination line, data may be extracted from one or more views indicative of the object. The data that is extracted from the respective views is generally indicative of rays that traverse the examination line and have a trajectory that meets predetermined criteria. Using the extracted data from a plurality of views, one or more projection lines that are substantially parallel to a corresponding image slice are produced and a two-dimensional projection image is generated.
摘要翻译： 本文提供了用于从螺旋数据生成被检查对象的二维投影图像的技术和/或系统。 位于与图像平面平行的平面中的检查线的图像平面和距离或高度可以选择或不具有用户输入。 使用所选择的图像平面和检查线，可以从指示对象的一个或多个视图中提取数据。 从各视图提取的数据通常表示穿过检查线并具有满足预定标准的轨迹的光线。 使用来自多个视图的提取的数据，产生基本上平行于相应图像切片的一个或多个投影线，并且生成二维投影图像。
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公开(公告)号：US20120177273A1
公开(公告)日：2012-07-12
申请号：US13393046
申请日：2009-08-28
申请人： Ram Naidu , Sergey Simanovsky
发明人： Ram Naidu , Sergey Simanovsky
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , A61B6/027
摘要： Techniques and/or systems for generating a two-dimensional projection image of an object under examination from helical data are provided herein. An image plane and a distance, or height, of an examination line lying in a plane parallel to the image plane may be selected with or without user input. Using the selected image plane and examination line, data may be extracted from one or more views indicative of the object. The data that is extracted from the respective views is generally indicative of rays that traverse the examination line and have a trajectory that meets predetermined criteria. Using the extracted data from a plurality of views, one or more projection lines that are substantially parallel to a corresponding image slice are produced and a two-dimensional projection image is generated.
摘要翻译： 本文提供了用于从螺旋数据生成被检查对象的二维投影图像的技术和/或系统。 位于与图像平面平行的平面中的检查线的图像平面和距离或高度可以选择或不具有用户输入。 使用所选择的图像平面和检查线，可以从指示对象的一个或多个视图中提取数据。 从各视图提取的数据通常表示穿过检查线并具有满足预定标准的轨迹的光线。 使用来自多个视图的提取的数据，产生基本上平行于相应图像切片的一个或多个投影线，并且生成二维投影图像。
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50.发明授权公开(公告)号：US07970096B2
公开(公告)日：2011-06-28
申请号：US12349893
申请日：2009-01-07
CPC分类号： G21K1/10 , A61B6/032 , A61B6/4021 , A61B6/4028 , A61B6/4035 , A61B6/4241 , A61B6/482
摘要： The disclosed CT scanner comprises at least one source of X-rays; a detector array comprising a plurality of detectors; and an X-ray filter mask arrangement disposed between the source of X-rays and detector array so as to modify the spectra of the X-rays transmitted from the source through the mask to at least some of the detectors so that the X-ray spectra detected by at least one set of detectors is different from the X-ray spectra detected by at least one other set of detectors.
摘要翻译： 所公开的CT扫描器包括至少一个X射线源; 包括多个检测器的检测器阵列; 以及设置在X射线源和检测器阵列之间的X射线滤波器掩模布置，以便将从源通过掩模传输的X射线的光谱修改到至少一些检测器，使得X射线 由至少一组检测器检测的光谱与由至少另一组检测器检测的X射线光谱不同。
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