-
公开(公告)号：US08160200B2
公开(公告)日：2012-04-17
申请号：US12750050
申请日：2010-03-30
申请人： John Eric Tkaczyk , David Allen Langan , Samit Kumar Basu , Xiaoye Wu , Bruno Kristiaan Bernard De Man , Jeffrey Seymour Gordon
发明人： John Eric Tkaczyk , David Allen Langan , Samit Kumar Basu , Xiaoye Wu , Bruno Kristiaan Bernard De Man , Jeffrey Seymour Gordon
IPC分类号： H05G1/26
CPC分类号： A61B6/4035 , A61B6/032 , A61B6/405 , A61B6/4241 , A61B6/482 , A61B6/488 , A61B6/542
摘要： A technique for acquiring desired image data in an imaging system comprising at least one radiation source and a detector is described. Initially, preliminary image data corresponding to an object may be acquired. Further, at least one parameter associated with the radiation source and corresponding to a particular view angle of the radiation source may be determined based on the preliminary image data and a priori information. Similarly, at least one parameter associated with the detector and corresponding to the particular view angle may be determined based on a priori information and the preliminary image data. Efficient operating modes of the radiation source and the detector corresponding to the particular view angle may be selected based on the determined parameters to achieve a desired system performance. Subsequently, the final image data may be acquired using the selected operating modes of the radiation source and the detector.
摘要翻译： 描述了在包括至少一个辐射源和检测器的成像系统中获取所需图像数据的技术。 首先，可以获取与对象相对应的初步图像数据。 此外，可以基于初步图像数据和先验信息来确定与辐射源相关联并且对应于辐射源的特定视角的至少一个参数。 类似地，可以基于先验信息和初步图像数据来确定与检测器相关联并且对应于特定视角的至少一个参数。 可以基于确定的参数来选择对应于特定视角的辐射源和检测器的有效操作模式以实现期望的系统性能。 随后，可以使用所选择的辐射源和检测器的操作模式来获取最终图像数据。
-
公开(公告)号：US20110243413A1
公开(公告)日：2011-10-06
申请号：US12750050
申请日：2010-03-30
申请人： John Eric Tkaczyk , David Allen Langan , Samit Kumar Basu , Xiaoye Wu , Bruno Kristiaan Bernard De Man , Jeffrey Seymour Gordon
发明人： John Eric Tkaczyk , David Allen Langan , Samit Kumar Basu , Xiaoye Wu , Bruno Kristiaan Bernard De Man , Jeffrey Seymour Gordon
CPC分类号： A61B6/4035 , A61B6/032 , A61B6/405 , A61B6/4241 , A61B6/482 , A61B6/488 , A61B6/542
摘要： A technique for acquiring desired image data in an imaging system comprising at least one radiation source and a detector is described. Initially, preliminary image data corresponding to an object may be acquired. Further, at least one parameter associated with the radiation source and corresponding to a particular view angle of the radiation source may be determined based on the preliminary image data and a priori information. Similarly, at least one parameter associated with the detector and corresponding to the particular view angle may be determined based on a priori information and the preliminary image data. Efficient operating modes of the radiation source and the detector corresponding to the particular view angle may be selected based on the determined parameters to achieve a desired system performance. Subsequently, the final image data may be acquired using the selected operating modes of the radiation source and the detector.
摘要翻译： 描述了在包括至少一个辐射源和检测器的成像系统中获取所需图像数据的技术。 首先，可以获取与对象相对应的初步图像数据。 此外，可以基于初步图像数据和先验信息来确定与辐射源相关联并且对应于辐射源的特定视角的至少一个参数。 类似地，可以基于先验信息和初步图像数据来确定与检测器相关联并且对应于特定视角的至少一个参数。 可以基于确定的参数来选择对应于特定视角的辐射源和检测器的有效操作模式以实现期望的系统性能。 随后，可以使用所选择的辐射源和检测器的操作模式来获取最终图像数据。
-
公开(公告)号：US07366279B2
公开(公告)日：2008-04-29
申请号：US10903298
申请日：2004-07-29
申请人： Peter Michael Edic , Bruno Kristiaan Bernard De Man , Mark Ernest Vermilyea , Christopher David Unger , John Eric Tkaczyk , James Walter LeBlanc , Samit Kumar Basu , William Robert Ross , Jonathan David Short , Scott Stephen Zelakiewicz
发明人： Peter Michael Edic , Bruno Kristiaan Bernard De Man , Mark Ernest Vermilyea , Christopher David Unger , John Eric Tkaczyk , James Walter LeBlanc , Samit Kumar Basu , William Robert Ross , Jonathan David Short , Scott Stephen Zelakiewicz
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/4014 , A61B6/4028 , A61B6/4291 , A61B6/5282 , G21K1/025
摘要： Various configurations for scatter reduction and control are provided for CT imaging. These configurations include an imaging system having a stationary detector extending generally around a portion of an imaging volume and a distributed X-ray source placed proximal to the stationary detector for radiating an X-ray beam toward the stationary detector. A scatter control system is further provided that is configured to adaptively operate in cooperation with the stationary detector and the distributed X-ray source to focally align collimator septa contained therein to the X-ray beam at a given focal point and to provide X-ray beam scatter control.
摘要翻译： 为CT成像提供了用于散射减少和控制的各种配置。 这些配置包括成像系统，其具有大致围绕成像体积的一部分延伸的固定检测器，以及放置在固定检测器附近的分布式X射线源，用于向固定检测器辐射X射线束。 还提供了一种散射控制系统，其被配置为与固定式检测器和分布式X射线源协作自适应地操作，以将给定焦点上的准直器隔片聚焦到X射线束，并提供X射线 光束散射控制。
-
公开(公告)号：US07280631B2
公开(公告)日：2007-10-09
申请号：US10816064
申请日：2004-04-01
申请人： Bruno Kristiaan Bernard De Man , Samit Kumar Basu , Peter Michael Edic , Robert Franklin Senzig , William Robert Ross , Xiaoye Wu , Colin Richard Wilson , Mark Ernest Vermilyea , Eugene Lino Saragnese
发明人： Bruno Kristiaan Bernard De Man , Samit Kumar Basu , Peter Michael Edic , Robert Franklin Senzig , William Robert Ross , Xiaoye Wu , Colin Richard Wilson , Mark Ernest Vermilyea , Eugene Lino Saragnese
IPC分类号： G01N23/00
CPC分类号： A61B6/4275 , A61B6/027 , A61B6/03 , A61B6/032 , A61B6/4014 , G01N23/046 , G01N2223/419 , G01T1/2985
摘要： Configurations for stationary imaging systems are provided. The configurations may include combinations of various types of distributed sources of X-ray radiation, which generally include addressable emitter elements which may be triggered for emission in desired sequences and combinations. The sources may be ring-like, partial ring-like, or line-like (typically along a Z-axis), and so forth. Combinations of these are envisaged. Corresponding detectors may also be full ring detectors or partial ring detectors associated with the sources to provide sufficient coverage of imaging volumes and to provide the desired mathematical completeness of the collected data.
摘要翻译： 提供固定成像系统的配置。 这些配置可以包括各种类型的分布的X射线辐射源的组合，其通常包括可寻址的发射体元件，其可以以期望的顺序和组合被发射。 源可以是环状，部分环状或线状（通常沿Z轴），等等。 设想这些的组合。 相应的检测器还可以是与源相关联的全环检测器或部分环检测器，以提供成像体积的足够覆盖并提供收集的数据的期望的数学完整性。
-
5.发明授权Method and apparatus for calibrating volumetric computed tomography systems 失效用于校准体积计算机断层摄影系统的方法和装置公开(公告)号：US07016456B2
公开(公告)日：2006-03-21
申请号：US10699087
申请日：2003-10-31
IPC分类号： A61B6/03
摘要： The present invention provides a method for determining a geometry of a scanning volumetric computed tomographic (CT) system having a rotation axis, a rotational plane, an x-ray source and a detector. The method includes scanning a phantom having a series of spatially separated discrete markers with the scanning volumetric computed tomographic system, wherein the markers are configured on a supporting structure of the phantom so as to permit separate identification of each marker in a collection of projection images. The method further includes locating images of the markers in each projection, using the located marker images to assign marker locations to tracks, and using the assigned tracks, determining a relative alignment between the detector, the source, and the rotation axis of the scanning volumetric computed tomographic system.
摘要翻译： 本发明提供了一种用于确定具有旋转轴，旋转平面，x射线源和检测器的扫描体积计算机断层摄影（CT）系统的几何形状的方法。 该方法包括用扫描体积计算机断层摄影系统扫描具有一系列空间分离的离散标记的体模，其中标记被配置在体模的支撑结构上，以允许在投影图像的集合中单独识别每个标记。 该方法还包括使用定位的标记图像将标记的图像定位在每个投影中，以将标记位置分配给轨迹，并使用分配的轨迹，确定扫描体积的检测器，源和旋转轴之间的相对对准 计算机断层摄影系统。
-
公开(公告)号：US07379525B2
公开(公告)日：2008-05-27
申请号：US11011358
申请日：2004-12-15
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/027 , G01N23/046 , G01N2223/3304 , G01N2223/419 , Y10S378/901
摘要： A method for reconstructing cone-beam projection data is provided. The method comprises scanning an object in helical mode, wherein the scanning comprises obtaining cone-beam projection data. The method further comprises processing the cone-beam projection data along a plurality of data filtering curves. The processing includes processing the cone-beam projection data along a portion of the data filtering curves that extends outside of a physical detector area to a virtual detector area. Then, the method comprises using the processed cone-beam projection data in the generation of a reconstructed image of the object.
摘要翻译： 提供了一种重建锥束投影数据的方法。 该方法包括以螺旋模式扫描物体，其中扫描包括获得锥束投影数据。 该方法还包括沿多个数据滤波曲线处理锥形束投影数据。 该处理包括沿着在物理检测器区域外延伸到虚拟检测器区域的数据滤波曲线的一部分处理锥形束投影数据。 然后，该方法包括在生成对象的重建图像时使用经处理的锥束投影数据。
-
公开(公告)号：US20080118020A1
公开(公告)日：2008-05-22
申请号：US11561114
申请日：2006-11-17
申请人： Jean-Baptiste Daniel Marie Thibault , Jiang Hsieh , Bruno Kristiaan Bernard De Man , Samit Kumar Basu , Zhou Yu , Charles Addison Bouman , Ken David Sauer
发明人： Jean-Baptiste Daniel Marie Thibault , Jiang Hsieh , Bruno Kristiaan Bernard De Man , Samit Kumar Basu , Zhou Yu , Charles Addison Bouman , Ken David Sauer
CPC分类号： G06T11/006 , G06T2211/424
摘要： A method for reconstructing an image of an object, the image comprising a plurality of image elements, is disclosed. The method includes accessing image data associated with the plurality of image elements, applying a first algorithm to the plurality of image elements, selecting a spatially non-homogenous set of the plurality of image elements, and applying an iterative algorithm to the set of image elements to reduce an amount of time necessary for reconstructing the image, or to improve an image quality at a fixed computation time, or both.
摘要翻译： 公开了一种用于重构对象的图像的方法，该图像包括多个图像元素。 该方法包括访问与多个图像元素相关联的图像数据，向多个图像元素应用第一算法，选择多个图像元素的空间非均匀集合，以及将迭代算法应用于图像元素集合 以减少重建图像所需的时间量，或者以固定的计算时间或两者来提高图像质量。
-
公开(公告)号：US07376255B2
公开(公告)日：2008-05-20
申请号：US10874976
申请日：2004-06-23
CPC分类号： G06T11/005 , G06T2211/416 , G06T2211/421 , Y10S378/901
摘要： A method for reconstructing image data acquired by a computed tomography system is provided. The method comprises selecting a portion of image data to be reconstructed and determining a corresponding portion of projection data. An adaptive filter is computed and applied to the portion of projection data to generate a portion of adaptively-filtered projection data. The adaptive filter is computed based upon desired quality properties of the portion of image data. Finally, the portion of image data is reconstructed based upon the portion of adaptively-filtered projection data. The step of selecting, computing and reconstructing is repeated for every pixel or group of pixels comprising the image data.
摘要翻译： 提供了一种重建由计算机断层摄影系统获取的图像数据的方法。 该方法包括选择要重建的图像数据的一部分并确定投影数据的对应部分。 计算自适应滤波器并将其应用于投影数据的一部分以生成自适应滤波投影数据的一部分。 基于图像数据部分的期望质量特性来计算自适应滤波器。 最后，基于自适应滤波投影数据的部分重建图像数据的部分。 对于包括图像数据的每个像素或像素组重复选择，计算和重建的步骤。
-
9.发明授权Method for performing image reconstruction using hybrid computed tomography detectors 有权使用混合计算机断层摄影检测器进行图像重建的方法公开(公告)号：US07372934B2
公开(公告)日：2008-05-13
申请号：US11317841
申请日：2005-12-22
IPC分类号： H05G1/60
CPC分类号： G01N23/046 , A61B6/032 , A61B6/4241 , A61B6/482 , G01N2223/419 , Y10S378/901
摘要： A method for acquiring an image data set comprising energy integrating (EI) and energy discriminating (ED) data measurements is provided. The method comprises obtaining EI measurement data and ED measurement data during an acquisition cycle. The method then comprises combining the EI measurement data and the ED measurement data before, during or after reconstruction. Finally the method comprises performing reconstruction on the original or combined datasets to obtain one or more of an EI image and one or more ED component images.
摘要翻译： 提供了一种用于获取包括能量积分（EI）和能量鉴别（ED）数据测量的图像数据集的方法。 该方法包括在采集周期中获得EI测量数据和ED测量数据。 该方法然后包括在重建之前，期间或之后组合EI测量数据和ED测量数据。 最后，该方法包括对原始或组合数据集执行重建以获得EI图像和一个或多个ED分量图像中的一个或多个。
-
10.发明授权公开(公告)号：US06724856B2
公开(公告)日：2004-04-20
申请号：US10121867
申请日：2002-04-15
IPC分类号： G01N23083
CPC分类号： G06T11/006 , G06T2211/424
摘要： Methods for projecting and backprojecting rays with respect to pixels/detector bins to attenuate/eliminate high-frequency artifacts, are disclosed. The first two methods are adaptations of pixel-driven and ray-driven linear interpolation techniques respectively. In these techniques, the window or shadow of each pixel/bin is dynamically adjusted and projected onto the detector bin/pixel to eliminate gaps between the shadows. This allows the effect of each pixel on a given detector bin (or vice versa) to be appropriately weighted. A third is a distance-driven technique wherein the transitions of the pixels and the detector bins are respectively projected onto a common axis. This allows a determination of the contribution of each of the pixels/bins for each of the bins/pixels with lower computation time and improved artifact free images.
摘要翻译： 公开了相对于像素/检测器箱投射和反投影光线以衰减/消除高频伪影的方法。 前两种方法分别是像素驱动和射线驱动线性插值技术的适应。 在这些技术中，每个像素/仓的窗口或阴影被动态地调整并投影到检测器箱/像素上，以消除阴影之间的间隙。 这允许适当地加权给定检测器箱（或反之亦然）上的每个像素的效果。 第三种是距离驱动技术，其中像素和检测器箱的转变分别投影到公共轴上。 这允许确定具有较低计算时间和改进的无伪像图像的每个像素/像素的每个像素/块的贡献。
-
-
-
-
-
-
-
-
-
搜索结果
57 条记录 (耗时 0.031 秒)