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公开(公告)号：US20050226364A1
公开(公告)日：2005-10-13
申请号：US10816015
申请日：2004-03-31
CPC分类号： A61B6/032 , A61B6/035 , A61B6/4014
摘要： Geometries and configurations are provided for CT systems in which rotational loading is reduced, permitting higher speeds and lighter structures to be implemented in the systems. In certain embodiments a distributed and addressable rotating radiation source is provided with a rotating detector. In other embodiments a distributed and addressable stationary radiation source is provided with a rotating detector. In yet other embodiments a distributed and addressable radiation source is provided that rotates with respect to a stationary detector. The sources may be ring-like, arcuate and/or lines extending at least in the Z-direction. Sources may include a large number of distributed emitters arranged in lines, arcs and one- or two-dimensional arrays.
摘要翻译： 为CT系统提供几何和配置，其中旋转负载减小，允许在系统中实现更高的速度和更轻的结构。 在某些实施例中，分布式和可寻址的旋转辐射源设置有旋转检测器。 在其他实施例中，分布式和可寻址的固定辐射源设置有旋转检测器。 在其他实施例中，提供了一种相对于静止检测器旋转的分布式和可寻址的辐射源。 源可以是至少沿Z方向延伸的环状，弓形和/或线。 源可以包括以线，弧和一维或二维阵列排列的大量分布式发射器。
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公开(公告)号：US20050100127A1
公开(公告)日：2005-05-12
申请号：US10704179
申请日：2003-11-07
申请人： Qi Zhao , Peter Edic , Bruno Bernard De Man , Samit Basu
发明人： Qi Zhao , Peter Edic , Bruno Bernard De Man , Samit Basu
CPC分类号： A61B6/4014 , A61B6/032 , A61B6/4085 , Y10S378/901
摘要： A method for imaging an object that includes utilizing a computed tomography imaging apparatus having a distributed x-ray source to acquire samples of projection data of an object in angular and temporal space utilizing a predetermined sampling lattice. Acquired projection data is filtered utilizing a two-dimensional linear filter to produce filtered data, and the filtered data is then backprojected to obtain a reconstructed image of the object.
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公开(公告)号：US07639774B2
公开(公告)日：2009-12-29
申请号：US10744027
申请日：2003-12-23
申请人： Bruno De Man , Samit Basu
发明人： Bruno De Man , Samit Basu
CPC分类号： A61B6/032 , A61B6/4014 , G21K1/025
摘要： A technique is provided for improving z-axis coverage and/or reducing cone beam artifacts during CT imaging. Multiple X-ray emission points are provided along the z-axis. Some or all of the emission points may be concurrently active. X-rays from concurrently active emission points are collimated so that X-rays from two or more emission points do not overlap on the detector. In addition, different groups of concurrently activated emission points may be sequentially or alternately activated, in conjunction with collimation, to prevent the overlap of X-rays from different emission points on the detector. In this manner, The X-rays may be timed and collimated such that the respective streams of radiation become adjacent at different locations, such as at the detector, the isocenter, or edge of the field of view.
摘要翻译： 提供了一种用于在CT成像期间改善z轴覆盖和/或减少锥束伪影的技术。 沿z轴提供多个X射线发射点。 一些或所有发射点可以同时有效。 来自同时有效发射点的X射线被准直，使得来自两个或更多个发射点的X射线在检测器上不重叠。 此外，不同组的同时激活的发射点可以与准直相关或交替地激活，以防止来自检测器上不同发射点的X射线的重叠。 以这种方式，X射线可以被定时和准直，使得相应的辐射流在诸如检测器，等角点或视场边缘的不同位置处相邻。
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14.发明授权公开(公告)号：US07333587B2
公开(公告)日：2008-02-19
申请号：US10789539
申请日：2004-02-27
申请人： Bruno De Man , Peter Michael Edic , Samit Basu
发明人： Bruno De Man , Peter Michael Edic , Samit Basu
IPC分类号： G01N23/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4028 , A61B6/4085
摘要： A technique is provided for imaging a field of view using an X-ray source comprising two or more emission points. Each emission point is configured to emit a fan of radiation encompassing less than the entire field of view. The emission points are activated individually and rotate about the field of view, allowing respective streams of radiation to be emitted at various view angles about the field of view. The emission points, which may correspond to different radial regions of the field of view, may be differentially activated to emphasize a region of interest within the field of view. The multiple emission points may be extrapolated along the longitudinal axis in duplicate or offset configurations.
摘要翻译： 提供了一种使用包括两个或更多个发射点的X射线源对视场成像的技术。 每个发射点被配置为发射包含小于整个视场的辐射风扇。 发射点被单独激活并围绕视场旋转，允许相应的辐射流以关于视场的各种视角发射。 可以对应于视场的不同径向区域的发射点可以被差异地激活以强调视野范围内的感兴趣区域。 多个发射点可以沿纵向轴线重复或偏移配置外推。
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公开(公告)号：US20070140409A1
公开(公告)日：2007-06-21
申请号：US11627144
申请日：2007-01-25
申请人： Jerome Arenson , David Ruimi , Evgeny Drapkin , Dmitry Samsonov , Bruno De Man , Samit Basu
发明人： Jerome Arenson , David Ruimi , Evgeny Drapkin , Dmitry Samsonov , Bruno De Man , Samit Basu
CPC分类号： G01T1/1644 , A61B6/027 , A61B6/032 , A61B6/4241 , A61B6/482 , A61B6/583 , G01T1/1647 , G06T5/002 , G06T5/20 , G06T2207/10081 , G06T2207/30004 , G06T2207/30112 , Y10S378/901
摘要： An adaptive CT data acquisition system and technique is presented whereby radiation emitted for CT data acquisition is dynamically controlled to limit exposure to those detectors of a CT detector assembly that may be particularly susceptible to saturation during a given data acquisition. The data acquisition technique recognizes that for a given subject size and position that pre-subject filtering and collimating of a radiation beam may be insufficient to completely prevent detector saturation. Therefore, the present invention includes implementation of a number of CT data correction techniques for correcting otherwise unusable data of a saturated CT detector. These data correction techniques include a nearest neighbor correction, off-centered phantom correction, off-centered synthetic data correction, scout data correction, planar radiogram correction, and a number of others. The invention is applicable with energy discriminating CT systems as well as with conventional CT systems and other multi-energy CT systems, such as dual kVp-based systems.
摘要翻译： 提出了一种自适应CT数据采集系统和技术，其中动态地控制用于CT数据采集的辐射，以限制在给定数据采集期间可能特别容易饱和的CT检测器组件的那些检测器的暴露。 数据采集技术认识到，对于给定的主体大小和位置，预辐射滤波和辐射束的准直可能不足以完全防止检测器饱和。 因此，本发明包括实现多个用于校正饱和CT检测器的不可用数据的CT数据校正技术。 这些数据校正技术包括最近邻校正，偏心幻像校正，偏心合成数据校正，侦察数据校正，平面放射线图校正以及其他数目。 本发明适用于能量识别CT系统以及常规CT系统和其他多能CT系统，例如基于双kVp的系统。
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公开(公告)号：US07054409B2
公开(公告)日：2006-05-30
申请号：US10334302
申请日：2002-12-31
申请人： William Ross , Peter Michael Edic , Samit Basu , Nadeem Ishaque , Deborah Walter , John McLeod
发明人： William Ross , Peter Michael Edic , Samit Basu , Nadeem Ishaque , Deborah Walter , John McLeod
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , A61B6/4014 , A61B6/469 , A61B6/503 , A61B6/508 , A61B6/563 , G01N23/046 , G01N2223/419 , G01N2223/612 , G01T1/2985
摘要： A method and apparatus for providing a configurable field of view in a non-invasive imaging system, such as a CT medical imaging system. A detector structure comprising two or more flat-panel X-ray detectors is provided such that the configurable field of view may encompass the full area of the two or more X-ray detectors or any suitable subset of the full area. The field of view may be configured based upon an acceptable field of view in conjunction with an acceptable scan speed.
摘要翻译： 一种用于在诸如CT医学成像系统的非侵入性成像系统中提供可配置视野的方法和装置。 提供包括两个或更多个平板X射线检测器的检测器结构，使得可配置视场可以包含两个或更多个X射线检测器的全部区域或者整个区域的任何合适的子集。 可以基于可接受的视场结合可接受的扫描速度来配置视野。
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公开(公告)号：US20060109950A1
公开(公告)日：2006-05-25
申请号：US10904736
申请日：2004-11-24
申请人： Jerome Arenson , John Tkaczyk , David Ruimi , Oded Meirav , Evgeny Drapkin , Dmitry Samsonov , Lev Greenberg , Bruno De Man , Samit Basu , Xiaoye Wu , Yangeng Du
发明人： Jerome Arenson , John Tkaczyk , David Ruimi , Oded Meirav , Evgeny Drapkin , Dmitry Samsonov , Lev Greenberg , Bruno De Man , Samit Basu , Xiaoye Wu , Yangeng Du
CPC分类号： G01T1/1644 , A61B6/027 , A61B6/032 , A61B6/4241 , A61B6/482 , A61B6/583 , G01T1/1647 , G06T5/002 , G06T5/20 , G06T2207/10081 , G06T2207/30004 , G06T2207/30112 , Y10S378/901
摘要： An adaptive CT data acquisition system and technique is presented whereby radiation emitted for CT data acquisition is dynamically controlled to limit exposure to those detectors of a CT detector assembly that may be particularly susceptible to saturation during a given data acquisition. The data acquisition technique recognizes that for a given subject size and position that pre-subject filtering and collimating of a radiation beam may be insufficient to completely prevent detector saturation. Therefore, the present invention includes implementation of a number of CT data correction techniques for correcting otherwise unusable data of a saturated CT detector. These data correction techniques include a nearest neighbor correction, off-centered phantom correction, off-centered synthetic data correction, scout data correction, planar radiogram correction, and a number of others. The invention is applicable with energy discriminating CT systems as well as with conventional CT systems and other multi-energy CT systems, such as dual kVp-based systems.
摘要翻译： 提出了一种自适应CT数据采集系统和技术，其中动态地控制用于CT数据采集的辐射，以限制在给定数据采集期间可能特别容易饱和的CT检测器组件的那些检测器的暴露。 数据采集技术认识到，对于给定的主体大小和位置，预辐射滤波和辐射束的准直可能不足以完全防止检测器饱和。 因此，本发明包括实现用于校正饱和CT检测器的其他不可用数据的多个CT数据校正技术。 这些数据校正技术包括最近邻校正，偏心幻像校正，偏心合成数据校正，侦察数据校正，平面放射线图校正以及其他数目。 本发明适用于能量识别CT系统以及常规CT系统和其他多能CT系统，例如基于双kVp的系统。
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公开(公告)号：US20050249416A1
公开(公告)日：2005-11-10
申请号：US10839858
申请日：2004-05-07
申请人： William Leue , Ricardo Avila , Colin Mc Culloch , Samit Basu , Deborah Walter
发明人： William Leue , Ricardo Avila , Colin Mc Culloch , Samit Basu , Deborah Walter
CPC分类号： G01V5/005 , G06T7/0004 , G06T7/11 , G06T7/143 , G06T2207/10081 , G06T2207/30112
摘要： A technique is disclosed for detecting contraband by obtaining image data from a computed tomography machine and generating variance data and a variance map from the image data acquired. The method includes obtaining a mean density value and a variation value for each voxel of the image data, segmenting the voxels into discrete objects, and determining whether any of the discrete objects is contraband.
摘要翻译： 公开了一种通过从计算机断层摄影机获得图像数据并从获取的图像数据生成方差数据和方差图来检测违禁品的技术。 该方法包括获得图像数据的每个体素的平均密度值和变化值，将体素分割为离散对象，以及确定任何离散对象是否违禁。
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19.发明授权Method, system and program product for tomographic backprojection using multi-color rendering engine 失效使用多色渲染引擎的断层扫描反投影的方法，系统和程序产品公开(公告)号：US06625249B1
公开(公告)日：2003-09-23
申请号：US10251726
申请日：2002-09-20
申请人： Joshua M. Temkin , John Schmiederer , Samit Basu
发明人： Joshua M. Temkin , John Schmiederer , Samit Basu
IPC分类号： A61B603
CPC分类号： A61B6/032 , A61B6/027 , G06T11/006 , Y10S378/901
摘要： Method, system and program product are provided implementing a technique for backprojecting an image from a projection data set. The technique includes splitting the projection data set into a plurality of multi-channel textures, with each multi-channel texture corresponding to a predetermined number of color channels of a multi-color rendering engine. The multi-color rendering engine is employed to simultaneously render the split projection data set and obtain intermediate results for each color channel. The intermediate results of each color channel are then accumulated to generate separate rendered images, wherein multiple images are simultaneously rendered from the projection data set using the separate color channels of the multi-color rendering engine.
摘要翻译： 提供了一种方法，系统和程序产品，其实现了用于从投影数据集中反投影图像的技术。 该技术包括将投影数据集分割为多个多通道纹理，每个多通道纹理对应于多色渲染引擎的预定数量的色彩通道。 多色渲染引擎用于同时呈现分割投影数据集并获得每个颜色通道的中间结果。 然后累积每个颜色通道的中间结果以产生单独的渲染图像，其中使用多色渲染引擎的单独颜色通道从投影数据集同时呈现多个图像。
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公开(公告)号：US06307911B1
公开(公告)日：2001-10-23
申请号：US09539074
申请日：2000-03-30
申请人： Samit Basu , Yoram Bresler
发明人： Samit Basu , Yoram Bresler
IPC分类号： A61B603
CPC分类号： G06T11/001 , G06T11/006 , Y10S378/901
摘要： Data representing a three-dimensional (3D) sinogram (array of numbers) is backprojected to reconstruct a 3D volume. The transformation requires N3 log2 N operations. An input sinogram is subdivided into a plurality of subsinograms using either an exact or approximate decomposition algorithm. The subsinograms are repeatedly subdivided until they represent volumes as small as one voxel. The smallest subsinograrns are backprojected using the direct approach to form a plurality of subvolumes, and the subvolumes are aggregated to form a final volume. Two subdivision algorithms are used. The first is an exact decomposition algorithm, which is accurate, but slow. The second is an approximate decomposition algorithm which is less accurate, but fast. By using both subdivision algorithms appropriately, high quality backprojections are computed significantly faster than existing techniques.
摘要翻译： 表示三维（3D）正弦图（数字数组）的数据被反向投影以重建3D体积。 转换需要N3 log2 N操作。 使用精确或近似分解算法将输入正弦图细分为多个子图。 亚像素图重复细分，直到它们表示体积小到一个体素。 使用直接方法来反投影最小的子游标，以形成多个子体积，并且子体积被聚合以形成最终体积。 使用两种细分算法。 第一个是精确的分解算法，它是准确的，但是很慢。 第二个是近似分解算法，其精度较低，但速度较快。 通过适当地使用两种细分算法，高质量的反投影计算速度明显快于现有技术。
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