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1.发明授权Systems, methods and apparatus for specialized filtered back-projection reconstruction for digital tomosynthesis 有权用于数字断层合成的专门滤波反投影重建的系统，方法和装置公开(公告)号：US07457451B2
公开(公告)日：2008-11-25
申请号：US11950418
申请日：2007-12-04
IPC分类号： G06K9/00 , G01N23/223
CPC分类号： G06T11/005 , G06T2211/424 , G06T2211/436
摘要： Systems, methods and apparatus are provided through which in one aspect, a three-dimensional (3D) image of an object is constructed from a plurality of two-dimensional (2D) images of the object using a specialized filter. In some embodiments, the specialized filter implements a linear ramp function, a windowing function, and/or a polynomial function. In some embodiments, the 3D image is back-projected from the filtered two-dimensional images, yielding a 3D image that has improved visual distinction of overlapping anatomic structures and reduced blurring.
摘要翻译： 提供了一种系统，方法和装置，通过该系统，方法和装置，在一个方面，使用专用滤波器从对象的多个二维（2D）图像构建对象的三维（3D）图像。 在一些实施例中，专用滤波器实现线性斜坡函数，加窗函数和/或多项式函数。 在一些实施例中，3D图像从经过滤的二维图像反投影，产生3D重建解剖结构改善的视觉区别并减少模糊。
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公开(公告)号：US07177455B2
公开(公告)日：2007-02-13
申请号：US11042253
申请日：2005-01-25
申请人： Richard J. Warp , Vianney P. Battle , Kenneth S. Kump , Stephen W. Metz , Matthew A. Halsmer , Renuka Uppaluri
发明人： Richard J. Warp , Vianney P. Battle , Kenneth S. Kump , Stephen W. Metz , Matthew A. Halsmer , Renuka Uppaluri
IPC分类号： G06K9/00
CPC分类号： A61B6/4429 , A61B6/4233 , A61B6/4291 , A61B6/5241 , A61B6/547 , A61B6/563
摘要： A method includes obtaining a first image of a subject at a first position, changing a position between the detector and the subject, obtaining a second image, and pasting the first and images to obtain a composite image. The first image and the second image may have an amount of overlap equal to no more than about 30 percent of a field of view of the detector in a direction of movement between the first image and the second image, and, according to some embodiments, may have an overlap of about 4 percent to about 16 percent. This may, in some embodiments, amount to an amount of overlap of about 1.5 cm to about 6.5 or 12 cm. In some embodiments, the span of overlap of the images is at least about 30 cm. The geometry of the images may be used to help paste the images together appropriately.
摘要翻译： 一种方法包括：在第一位置获取被摄体的第一图像，改变检测器和被摄体之间的位置，获得第二图像，以及粘贴第一图像和图像以获得合成图像。 第一图像和第二图像可以具有等于不超过检测器在第一图像和第二图像之间的移动方向上的视场的约30％的重叠量，并且根据一些实施例， 可能重叠约4％至约16％。 在一些实施例中，这可以达到约1.5cm至约6.5cm或12cm的重叠量。 在一些实施例中，图像的重叠范围至少约30cm。 可以使用图像的几何形状来帮助将图像粘贴到一起。
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3.发明授权公开(公告)号：US06885724B2
公开(公告)日：2005-04-26
申请号：US10646023
申请日：2003-08-22
申请人： Baojun Li , Abdulrahman Al-Khalidy , Jeffrey W. Eberhard , Stephen W. Metz , Bernhard Erich Hermann Claus , Vianney Pierre Battle
发明人： Baojun Li , Abdulrahman Al-Khalidy , Jeffrey W. Eberhard , Stephen W. Metz , Bernhard Erich Hermann Claus , Vianney Pierre Battle
CPC分类号： G01T1/2985 , A61B6/025 , A61B6/4464 , G01N23/044 , G01N2223/419 , G01N2223/612
摘要： Systems and methods that utilize asymmetric geometry to acquire radiographic tomosynthesis images are described. Embodiments comprise tomosynthesis systems and methods for creating a reconstructed image of an object from a plurality of two-dimensional x-ray projection images. These systems comprise: an x-ray detector; and an x-ray source capable of emitting x-rays directed at the x-ray detector; wherein the tomosynthesis system utilizes asymmetric image acquisition geometry, where θ1≠θ0, during image acquisition, wherein θ1 is a sweep angle on one side of a center line of the x-ray detector, and θ0 is a sweep angle on an opposite side of the center line of the x-ray detector, and wherein the total sweep angle, θasym, is θasym=θ1+θ0. Reconstruction algorithms may be utilized to produce reconstructed images of the object from the plurality of two-dimensional x-ray projection images.
摘要翻译： 描述了利用不对称几何来获取放射照相断层合成图像的系统和方法。 实施例包括用于从多个二维x射线投影图像创建对象的重建图像的层析合成系统和方法。 这些系统包括：x射线检测器; 以及能够发射针对x射线检测器的x射线的x射线源; 其中所述断层合成系统在图像采集期间利用不对称图像采集几何形状，其中θ1是扫掠角 在X射线检测器的中心线的一侧，θX是在x射线检测器的中心线的相对侧上的扫掠角，并且其中，总扫掠角度 不对称的是不对称的是不对称的。 可以利用重建算法从多个二维X射线投影图像中产生物体的重建图像。
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4.发明授权Methods and apparatus for high pitch helical computed tomography image reconstruction 失效高螺距螺旋计算机断层扫描图像重建方法与装置公开(公告)号：US06490334B1
公开(公告)日：2002-12-03
申请号：US09896957
申请日：2001-06-29
IPC分类号： A61B603
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4085 , A61B6/5205 , Y10S378/901
摘要： There is therefore provided, in one aspect, a method for imaging an object utilizing a computed tomographic (CT) imaging system having a rotating gantry, a multislice detector array on the rotating gantry and using at least n>1 rows of detector channels, and a radiation source on the rotating gantry configured to project a beam of radiation towards the multislice detector array through an object to be imaged. The method includes helically scanning the object with the CT imaging system at a pitch p>n to acquire projection data from the n rows of detector channels; applying a combined helical weight and conjugate weight to at least a portion of the acquired projection data to produce virtual projection data compensating for incomplete helical row data of the acquired projection data; and reconstructing an image of the object utilizing the acquired projection data and the virtual projection data.
摘要翻译： 因此，在一个方面中，提供一种利用具有旋转机架的计算机断层摄影（CT）成像系统对成像进行成像的方法，在旋转机架上使用多层检测器阵列并且至少使用n> 1行检测器通道，以及 旋转台架上的辐射源被配置成通过待成像的物体将辐射束投射到多层检测器阵列。 该方法包括用间距p> n的CT成像系统螺旋扫描物体，以从n行检测器通道获取投影数据; 对所获取的投影数据的至少一部分应用组合的螺旋重量和共轭权重，以产生补偿所获取的投影数据的不完整螺旋行数据的虚拟投影数据; 以及使用所获取的投影数据和虚拟投影数据来重建对象的图像。
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公开(公告)号：US07013034B2
公开(公告)日：2006-03-14
申请号：US10268323
申请日：2002-10-10
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4085 , G06T11/005
摘要： A method for reconstructing an image of an object utilizing a computed tomographic (CT) imaging system having a radiation source configured to project a beam of radiation through an object and towards a multislice detector array configured to sense attenuation of the radiation passing through the object; the method includes helically scanning an object to acquire a plurality of slices of projection data, generating a separate projection dataset for each of N separate detector rows wherein the separate projection datasets include detector row projection data and detector row conjugate projection data, combining the detector row projection data and the detector row conjugate projection data, and helically weighting the combined projection data using a combined helical weighting and conjugate data weighting algorithm such that a greater weight is applied to combined center row projection data than to at least one outermost detector row projection data.
摘要翻译： 一种用于使用计算机断层摄影（CT）成像系统来重建物体的图像的方法，所述计算机断层摄影（CT）成像系统具有被配置成将辐射束投射穿过物体并朝向被配置为感测穿过物体的辐射的衰减的多层检测器阵列投影的辐射源; 该方法包括螺旋扫描对象以获取多个投影数据片段，为N个单独检测器行中的每一个生成单独的投影数据集，其中分离的投影数据集包括检测器行投影数据和检测器行共轭投影数据，组合检测器行 投影数据和检测器行共轭投影数据，并且使用组合的螺旋加权和共轭数据加权算法对组合的投影数据进行螺旋加权，使得对组合的中心行投影数据施加更大的权重，而不是至少一个最外检测器行投影数据 。
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公开(公告)号：US06980624B2
公开(公告)日：2005-12-27
申请号：US10723034
申请日：2003-11-26
CPC分类号： A61B6/025 , G06F19/00 , G06T11/005 , G06T2211/436
摘要： A technique is provided for non-uniform weighting in back-projection calculations in tomosythesis. The non-uniform weighting may include weighting based on a count map of the number of times pixels of individual slices are traversed by radiation in different projections. Weighting may also include non-uniform functions for contributions of features at different slice level to the sensed X-ray attenuation system response inconsistencies are accounted for by further weighting based upon projection maps which may be created in separate system calibration or configuration routines.
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公开(公告)号：US06944265B2
公开(公告)日：2005-09-13
申请号：US10303672
申请日：2002-11-25
申请人： Richard J. Warp , Vianney P. Battle , Kenneth S. Kump , Stephen W. Metz , Matthew A. Halsmer , Renuka Uppaluri
发明人： Richard J. Warp , Vianney P. Battle , Kenneth S. Kump , Stephen W. Metz , Matthew A. Halsmer , Renuka Uppaluri
CPC分类号： A61B6/4429 , A61B6/4233 , A61B6/4291 , A61B6/5241 , A61B6/547 , A61B6/563
摘要： A device for use in image pasting is described. The device includes a digital x-ray detector capable of automatic digital imaging without the use of an image intensifier; the detector preferably being a flat-panel detector. Additionally, an image pasting system using a solid-state detector is described. The system can connect the detected images to a display via a network (such as a WAN, a LAN, or the internet). Further, an image geometry measurement device for use in pasting x-ray images is disclosed. The geometry measurement device helps determine the relative position of two images to be used in image pasting. This information can be used alone, or in connection with an image pasting algorithm. Still further, methods of forming composite images are disclosed using a flat-panel detector and using the geometry of the images. The disclosed devices and systems can be integrated with other digital image pasting technology.
摘要翻译： 描述了用于图像粘贴的设备。 该装置包括能够在不使用图像增强器的情况下自动数字成像的数字X射线检测器; 检测器优选地是平板检测器。 另外，描述了使用固态检测器的图像粘贴系统。 系统可以通过网络（例如WAN，LAN或互联网）将检测到的图像连接到显示器。 此外，公开了一种用于粘贴x射线图像的图像几何测量装置。 几何测量装置有助于确定要用于图像粘贴的两个图像的相对位置。 该信息可以单独使用，也可以与图像粘贴算法结合使用。 此外，使用平板检测器并使用图像的几何形状来公开形成复合图像的方法。 所公开的设备和系统可以与其他数字图像粘贴技术集成。
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公开(公告)号：US06418184B1
公开(公告)日：2002-07-09
申请号：US09752275
申请日：2000-12-29
申请人： Sharon X. Wang , Stephen W. Metz , John A. Fusco
发明人： Sharon X. Wang , Stephen W. Metz , John A. Fusco
IPC分类号： A61B603
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4085 , Y10S378/901
摘要： One aspect of the present invention is a method for reconstructing an image of an object utilizing a computed tomographic (CT) imaging system. The method includes steps of: helically scanning an object; interpolating an axial fan beam set of projection data as a vector function {right arrow over (R)}a from a fan beam set of projection data from the helical scan {right arrow over (R)}hi, where i=1, . . . , n is a row index and n represents a of number of rows of the detector array, using a relationship written as: R → a ( β , γ ) = ∑ i = 1 n w i ( β ) R → h i ( β , γ ) , where wi(&bgr;) is a weighting function written as: w i = ∑ j = 1 m f ( β - β j ) , where m is a number of images used for z smoothing, &bgr;j is a gantry rotation angle for a plane of reconstrution of a jth image, and f ( x ) = { g ( x ) , &LeftBracketingBar; x &RightBracketingBar; ≤ β b 0 , &LeftBracketingBar; x &RightBracketingBar; > β b where constants β b = 2 π p , and g(x) is either a linear or non-linear function.
摘要翻译： 本发明的一个方面是使用计算机断层摄影（CT）成像系统来重建物体的图像的方法。 该方法包括以下步骤：螺旋扫描物体; 将来自螺旋扫描的投影数据的扇形波束组（（R）} hi的右箭头，hi，其中i = 1，...）插入作为向量函数{（R）} a的右箭头的矢量函数的轴向扇形波束组。 。 。 ，n是行索引，n表示检测器阵列的行数，使用写为：其中wi（β）是写入的加权函数，其中m是用于z平滑的图像的数量，betaj 是第j个图像重构平面的机架旋转角，其中常数和g（x）是线性或非线性函数。
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公开(公告)号：US08156210B2
公开(公告)日：2012-04-10
申请号：US10338393
申请日：2003-01-08
IPC分类号： G06F15/173
CPC分类号： G06F19/321 , G06F19/00 , G16H15/00
摘要： A method is disclosed, in a diagnostic medical environment, that enhances workflow while using a computer-aided-detection (or diagnosis) (CAD) system in the environment. The method comprises generating image data with a diagnostic medical imaging acquisition system. The image data is transmitted from the diagnostic medical imaging acquisition system to a computer-aided-detection (or diagnosis) (CAD) system and an archive/review station. Detection results are generated by processing the image data, using the CAD system, while storing and viewing the image data on the archive/review station. The detection results are transmitted from the CAD system to the archive/review station. The detection results are integrated with the image data by the archive/review station to form composite image data. The composite image data is displayed by the archive/review system.
摘要翻译： 在诊断医疗环境中公开了在环境中使用计算机辅助检测（或诊断）（CAD）系统的同时增强工作流程的方法。 该方法包括用诊断医学成像采集系统生成图像数据。 图像数据从诊断医学成像采集系统传输到计算机辅助检测（或诊断）（CAD）系统和归档/检查站。 通过使用CAD系统处理图像数据，同时在存档/查看站上存储和查看图像数据来生成检测结果。 检测结果从CAD系统传送到档案/审查站。 检测结果与存档/审查站的图像数据集成，形成合成图像数据。 复合图像数据由归档/审查系统显示。
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公开(公告)号：US5907593A
公开(公告)日：1999-05-25
申请号：US978802
申请日：1997-11-26
申请人： Jiang Hsieh , Stephen W. Metz , Girish Saligram , Guy M. Besson , Hui Hu , Sandeep Dutta , Robert F. Senzig , Min Xie
发明人： Jiang Hsieh , Stephen W. Metz , Girish Saligram , Guy M. Besson , Hui Hu , Sandeep Dutta , Robert F. Senzig , Min Xie
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/421 , G06T2211/428 , Y10S378/901
摘要： A CT Fluoro system having an architecture and algorithms which facilitate increasing the frame rate and providing acceptable image quality is described. Generally, and in one embodiment, the system includes apparatus and algorithms that speed-up image reconstruction and reduce image artifacts that may result from such fast reconstruction. The fast reconstruction is achieved by performing, for example, view compression, channel compression, backprojection with reduced delay, and parallel processing.
摘要翻译： 描述了具有便于增加帧速率并提供可接受的图像质量的架构和算法的CT氟系统。 通常，在一个实施例中，该系统包括加速图像重构并减少可能由这种快速重建产生的图像伪像的装置和算法。 通过执行例如视图压缩，信道压缩，具有减少的延迟的反投影和并行处理来实现快速重建。
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