公开(公告)号：US06703835B2

公开(公告)日：2004-03-09

申请号：US10119724

申请日：2002-04-11

申请人： Sarah K. Patch ,  Tejaswini Shubhachint ,  Graeme C. McKinnon ,  Sandhya Parameswaran ,  Joseph K. Maier

发明人： Sarah K. Patch ,  Tejaswini Shubhachint ,  Graeme C. McKinnon ,  Sandhya Parameswaran ,  Joseph K. Maier

IPC分类号： G01N300

CPC分类号： G01R33/565 ,  G01R33/3875 ,  G01R33/56527 ,  G01R33/56563

摘要： A method for processing digital images includes acquiring a phase difference image which includes one or more phase wraps, creating a modulated phase difference image from the phase difference image, comparing the modulated phase difference image to the phase difference image to locate areas in the phase difference image to be unwrapped, and unwrapping the phase difference image based on the areas located in the comparing step. The unwrapping step is performed by replacing wrapped pixels in the phase difference image with pixels in the modulated phase difference image plus an integer multiple of &pgr;. The integer multiplier is computed by comparing overlapping pixels in the image segments. This has a smoothing effect causing the wrapped pixels in the phase difference image to become unwrapped. As a result of this pixel replacement process, an image of improved quality and information content is produced compared with conventional methods.

摘要翻译： 一种处理数字图像的方法包括获取包括一个或多个相位包的相位差图像，从相位差图像创建调制相位差图像，将调制相位差图像与相位差图像进行比较，以定位相位差中的区域 图像被展开，并且基于位于比较步骤中的区域展开相位差图像。 通过将相位差图像中的包围像素替换为调制相位差图像中的像素加上pi的整数倍来执行展开步骤。 通过比较图像片段中的重叠像素来计算整数乘数。 这具有使相位差图像中的被包裹的像素变得展开的平滑效果。 作为该像素替换处理的结果，与常规方法相比，产生了改善的质量和信息内容的图像。

公开(公告)号：US08529449B2

公开(公告)日：2013-09-10

申请号：US10800957

申请日：2004-03-15

申请人： Sarah K. Patch

发明人： Sarah K. Patch

IPC分类号： A61B8/00

CPC分类号： A61B8/0825 ,  A61B5/0095

摘要： The present invention is a directed to method and system of TCT imaging whereupon data associated with unmeasured or inadmissible transducer locations is determined from data acquired at measured or admissible transducer locations. The invention analyzes measured TCT data associated with several transducer locations to provide an estimate of unmeasured data so as to complete a full data set for image reconstruction. In this regard, by measuring TCT data at many points on the surface of a hemispherical bowl or sphere in which an imaging object is placed, mathematical coefficients may be determined for the TCT data as a function of transducer location. From these coefficients, the unmeasured transducer locations may be evaluated such that data associated with the unmeasured transducer locations may be estimated and utilized for image reconstruction to improve image quality as well as improve the diagnostic sensitivities or capabilities of the TCT system.

摘要翻译： 本发明涉及TCT成像的方法和系统，其中与未测量或不可接受的换能器位置相关联的数据由在测量或允许的换能器位置处获取的数据确定。 本发明分析与几个换能器位置相关联的测量的TCT数据，以提供未测量数据的估计，以便完成用于图像重建的完整数据集。 在这方面，通过在其中放置成像对象的半球形碗或球体的表面上的许多点处测量TCT数据，可以根据换能器位置确定TCT数据的数学系数。 根据这些系数，可以评估未测量的换能器位置，使得与未测量的换能器位置相关联的数据可以被估计并用于图像重建以改善图像质量以及提高TCT系统的诊断灵敏度或能力。

公开(公告)号：US06845144B2

公开(公告)日：2005-01-18

申请号：US10360588

申请日：2003-02-08

申请人： Akihiko Nishide ,  Sarah K. Patch

发明人： Akihiko Nishide ,  Sarah K. Patch

IPC分类号： A61B6/03 ,  G06T11/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  G06T2211/421 ,  Y10S378/901

摘要： To perform cone beam reconstruction by using projection data correctly corresponding to X-ray beam having passed through each pixel in the reconstruction area, data D1 is obtained which is plane projected to a plane based on projection data D0. Then, plane projection data D1 to the projection plane pp is projected to the reconstruction area in the direction of X-ray transmission to obtain back projection pixel data D2. Thereafter, back projection pixel data D2 will be added for each corresponding pixel for all views to obtain back projection data D3. The present invention provides reconstruction by device of projection data correctly corresponding to the X-ray beam having passed through the reconstruction area. Through the plane projection to a plane the operation will become simplified and faster.

摘要翻译： 为了通过使用正确对应于穿过重建区域中的每个像素的X射线束的投影数据来执行锥形束重建，获得基于投影数据D0投影到平面的平面的数据D1。 然后，将平面投影数据D1与投影平面pp投影到X射线透射方向的重建区域，以获得反投影像素数据D2。 此后，将针对所有视图为每个对应的像素添加背投影像素数据D2，以获得反投影数据D3。 本发明通过设备对通过重建区域的X射线束正确地对准投影数据。 通过平面投影到平面，操作将变得简单和快速。

公开(公告)号：US07878976B2

公开(公告)日：2011-02-01

申请号：US10864567

申请日：2004-06-09

申请人： Sarah K. Patch ,  David Finch ,  Victor Palamodov

发明人： Sarah K. Patch ,  David Finch ,  Victor Palamodov

IPC分类号： A61B8/00

CPC分类号： A61B8/0825 ,  A61B8/406

摘要： The present invention is directed to a method and system of TCT imaging whereupon an exact inversion formula is used for reconstruction of TCT data. The present invention utilizes inversion formulae that are of the filtered backprojection and ρ-filter types.

摘要翻译： 本发明涉及一种TCT成像的方法和系统，其中精确反演公式用于重建TCT数据。 本发明利用了滤波反投影和滤波器类型的反演公式。

公开(公告)号：US06754299B2

公开(公告)日：2004-06-22

申请号：US10211206

申请日：2002-08-02

申请人： Sarah K. Patch

发明人： Sarah K. Patch

IPC分类号： A61B603

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4085 ,  G06T11/005 ,  Y10S378/901

摘要： A method for reconstructing an image of an object utilizing a computed tomographic (CT) imaging system is provided. The CT system includes a radiation source and a multislice detector array on a rotating gantry, with the radiation source configured to project a beam of radiation through an object and towards. the multislice detector array. The multislice detector array is configured to sense attenuation of the radiation passing through the object. The method for reconstructing an image includes helically scanning an object with a computed tomographic imaging system to acquire a plurality of views of projection data at a plurality of gantry angles and a plurality of cone angles, generating a plurality of cone angle dependent weights that are inversely correlated to an absolute value of a cone angle, and weighting the projection data using the cone angle dependent weights.

摘要翻译： 提供了一种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。 CT系统包括辐射源和位于旋转机架上的多层检测器阵列，其中辐射源被配置成将辐射束投射通过物体并朝向。 多重检测器阵列。 多层检测器阵列被配置为感测穿过物体的辐射的衰减。 用于重建图像的方法包括用计算机断层摄影系统螺旋扫描对象，以获取多个台架角度和多个锥角度的投影数据的多个视图，产生多个相反的锥角依赖权重 与锥角的绝对值相关，并且使用锥角依赖权重对投影数据进行加权。

公开(公告)号：US06459754B1

公开(公告)日：2002-10-01

申请号：US09428183

申请日：1999-10-27

申请人： Guy M. Besson ,  Sarah K. Patch

发明人： Guy M. Besson ,  Sarah K. Patch

IPC分类号： A61B603

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4085 ,  G01N23/046 ,  G01N2223/419 ,  G06T11/006 ,  Y10S378/901

摘要： The present invention is, in one embodiment, a method for multi-slice, computed tomography imaging. The method includes steps of moving an x-ray source through a trajectory; projecting an x-ray cone beam from the moving x-ray source through an object towards a curved detector; and determining contributions of segments along the trajectory to voxels in a reconstruction volume of the object, including compensating the determined contributions for curvature of the detector and x-ray cone beam geometry.

摘要翻译： 本发明在一个实施例中是一种用于多切片计算机断层摄影成像的方法。 该方法包括通过轨迹移动x射线源的步骤; 将来自移动x射线源的X射线锥束投影通过物体朝向弯曲的检测器; 以及确定沿所述轨迹的线段对所述物体的重建体积中的体素的贡献，包括补偿所确定的所述检测器曲率的贡献和x射线锥形束几何形状。

公开(公告)号：US07336073B2

公开(公告)日：2008-02-26

申请号：US11559558

申请日：2006-11-14

申请人： Sarah K. Patch ,  Michael R. Hartley ,  James Grant Pipe

发明人： Sarah K. Patch ,  Michael R. Hartley ,  James Grant Pipe

IPC分类号： G01V3/00

CPC分类号： G01R33/561

摘要： The present invention is directed to a method of MR imaging whereby a k-space blade extending through a center of k-space from a subject in motion is acquired. A high-pass convolution of the k-space blade with a reference k-space blade is then determined and converted to a δ function. In-plane motion of the subject during data acquisition of the k-space is then determined from the δ function.

摘要翻译： 本发明涉及一种MR成像方法，其中获取从运动中的被摄体延伸穿过k空间的中心的k空间刀片。 然后确定k空间刀片与参考k空间刀片的高通卷积并转换为增量函数。 然后，从delta函数确定在k空间的数据采集期间的对象的平面内运动。

公开(公告)号：US07176684B2

公开(公告)日：2007-02-13

申请号：US11170054

申请日：2005-06-29

申请人： Sarah K. Patch ,  Michael R. Hartley ,  James G. Pipe

发明人： Sarah K. Patch ,  Michael R. Hartley ,  James G. Pipe

IPC分类号： G01V3/00

CPC分类号： G01R33/561

摘要： The present invention is directed to a method of MR imaging whereby a k-space blade extending through a center of k-space from a subject in motion is acquired. A high-pass convolution of the k-space blade with a reference k-space blade is then determined and converted to a δ function. In-plane motion of the subject during data acquisition of the k-space is then determined from the δ function.

摘要翻译： 本发明涉及一种MR成像方法，其中获取从运动中的被摄体延伸穿过k空间的中心的k空间刀片。 然后确定k空间刀片与参考k空间刀片的高通卷积并转换为增量函数。 然后，从delta函数确定在k空间的数据采集期间的对象的平面内运动。

公开(公告)号：US06292526B1

公开(公告)日：2001-09-18

申请号：US09428103

申请日：1999-10-27

申请人： Sarah K. Patch

发明人： Sarah K. Patch

IPC分类号： A61B603

CPC分类号： G01N23/046 ,  A61B6/027 ,  A61B6/032 ,  G01N2223/419 ,  G06T11/005 ,  Y10S378/901

摘要： The present invention is in one embodiment a method of processing projection data collected in a helical scan performed along a helical trajectory relative to an object being scanned. The method includes steps of defining a coordinate system to parameterize the data and generating estimates of projection data not on the helical trajectory by solving ultrahyperbolic equations in the defined coordinate system.

摘要翻译： 本发明在一个实施例中是一种处理以螺旋扫描收集的投影数据的方法，该螺旋扫描沿着相对于被扫描物体的螺旋轨迹执行。 该方法包括以下步骤：定义坐标系以对数据进行参数化，并通过解决定义的坐标系中的超双模方程来产生不在螺旋轨迹上的投影数据的估计。