公开(公告)号：US20080123803A1

公开(公告)日：2008-05-29

申请号：US11563061

申请日：2006-11-24

Applicant: Bruno K.B. De Man ,  Colin R. Wilson ,  Bernhard Claus ,  Maria Iatrou ,  James W. LeBlanc ,  Dirk Beque ,  Samit Kumar Basu ,  Mark Vermilyea ,  Zhye Yin

Inventor： Bruno K.B. De Man ,  Colin R. Wilson ,  Bernhard Claus ,  Maria Iatrou ,  James W. LeBlanc ,  Dirk Beque ,  Samit Kumar Basu ,  Mark Vermilyea ,  Zhye Yin

IPC: A61B6/00

CPC classification number: G01N23/046 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/4085 ,  G01N2223/419 ,  G01N2223/612

Abstract: A CT imaging system includes a rotatable gantry having an opening to receive an object to be scanned. A plurality of x-ray emission sources are attached to the rotatable gantry, each x-ray emission source configured to emit x-rays in a conebeam toward the object. The CT imaging system also includes a plurality of x-ray detector arrays attached to the gantry and positioned to receive x-rays passing through the object. At least one x-ray detector array of the plurality of x-ray detector arrays is configured to receive x-rays from more than one x-ray emission source.

Abstract translation: CT成像系统包括具有用于接收待扫描物体的开口的可旋转机架。 多个x射线发射源附着在可旋转机架上，每个X射线发射源被配置为朝向物体发射锥形束中的x射线。 CT成像系统还包括多个附接到台架的X射线检测器阵列，并被定位成接收通过物体的X射线。 多个X射线检测器阵列中的至少一个X射线检测器阵列被配置为从多于一个x射线发射源接收x射线。

公开(公告)号：US07356174B2

公开(公告)日：2008-04-08

申请号：US10839858

申请日：2004-05-07

Applicant: William Macomber Leue ,  Ricardo Scott Avila ,  Colin Craig Mc Culloch ,  Samit Kumar Basu ,  Deborah Joy Walter

Inventor： William Macomber Leue ,  Ricardo Scott Avila ,  Colin Craig Mc Culloch ,  Samit Kumar Basu ,  Deborah Joy Walter

IPC: G06K9/00

CPC classification number: G01V5/005 ,  G06T7/0004 ,  G06T7/11 ,  G06T7/143 ,  G06T2207/10081 ,  G06T2207/30112

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20080056432A1

公开(公告)日：2008-03-06

申请号：US11725877

申请日：2007-03-20

Applicant: Jed Douglas Pack ,  Bruno De Man ,  Samit Kumar Basu ,  John Charles Hill ,  Xiaoye Wu ,  Peter Michael Edic

Inventor： Jed Douglas Pack ,  Bruno De Man ,  Samit Kumar Basu ,  John Charles Hill ,  Xiaoye Wu ,  Peter Michael Edic

IPC: H05G1/60

CPC classification number: G06T11/005 ,  A61B6/027 ,  G06T2211/416 ,  H01J2235/068

Abstract: Systems and methods are provided for reconstructing projection data that is mathematically complete or sufficient acquired using a computed tomography (CT) system. In one embodiment, a set of projection data representative of a sampled portion of a cylindrical surface is provided. The set of projection data is reconstructed using a suitable cone-beam reconstruction algorithm. In another embodiment, two or more sets of spatially interleaved helical projection data are processed using helical interpolation. The helically interpolated set of projection data is reconstructed using a two-dimensional axial reconstruction algorithm or a three-dimensional reconstruction algorithm.

Abstract translation: 提供了系统和方法，用于重建使用计算机断层摄影（CT）系统获得的数学上完整或足够的投影数据。 在一个实施例中，提供了一组代表圆柱形表面的采样部分的投影数据。 使用合适的锥束重建算法重建投影数据集。 在另一个实施例中，使用螺旋插值来处理两组或多组空间交错的螺旋投影数据。 使用二维轴向重建算法或三维重建算法重建螺旋插值的投影数据集。

公开(公告)号：US07227923B2

公开(公告)日：2007-06-05

申请号：US11108419

申请日：2005-04-18

Applicant: Peter Michael Edic ,  Samit Kumar Basu ,  Bruno Kristiaan Bernard De Man

Inventor： Peter Michael Edic ,  Samit Kumar Basu ,  Bruno Kristiaan Bernard De Man

IPC: A61B6/00 ,  G01N23/00 ,  H05G1/70

CPC classification number: A61B6/4028 ,  A61B6/032 ,  A61B6/4085 ,  H05G1/52

Abstract: A method for Computed Tomography (CT) imaging is provided. The method comprises rotating a gantry at a substantially slow rotation speed about a volume of interest. The gantry comprises a combination of X-ray source points. The X-ray source points comprise one or more discrete emission points and an arc of discrete or continuous X-ray source points. The method then comprises obtaining projection data from the combination of X-ray source points and performing a suitable reconstruction based on the projection data obtained from the combination of X-ray source points, to generate one or more reconstructed images.

Abstract translation: 提供了一种计算机断层成像（CT）成像的方法。 该方法包括以基本上慢的旋转速度围绕感兴趣的体积旋转台架。 龙门架包括X射线源点的组合。 X射线源点包括离散或连续的X射线源点的一个或多个离散发射点和弧。 然后，该方法包括从X射线源点的组合获得投影数据，并且基于从X射线源点的组合获得的投影数据执行适当的重建，以生成一个或多个重建图像。

公开(公告)号：US07215731B1

公开(公告)日：2007-05-08

申请号：US11164625

申请日：2005-11-30

Applicant: Samit Kumar Basu ,  Bruno Kristiaan Bernard DeMan

Inventor： Samit Kumar Basu ,  Bruno Kristiaan Bernard DeMan

IPC: A61B6/03

CPC classification number: G06T11/006 ,  G06T2211/421 ,  Y10S378/901

Abstract: A reprojection/backprojection technique and apparatus for carrying out such a technique provides a hierarchical solution to speeding-up reprojection and backprojection of tomographic images. In the context of reprojection, a tomographic image is divided into a series of subimages. Each subimage is shifted to the origin, projected at a reduced number of views, and then up-sampled and shifted back (in the sinogram space). The resulting sinograms are then combined to provide a single sinogram. This process is applied one or more times recursively. In the context of backprojection, the above steps are transposed such that a sinogram is divided into a series of subsinograms. The subsinograms are then shifted and decimated by a given decimation factor. The decimated subsinograms are then backprojected onto hexagonal tiles whereupon the tiles are composited into a final image.

Abstract translation: 用于执行这种技术的再投影/反投影技术和装置提供了加速断层图像的再投影和反投影的分层解决方案。 在再投射的背景下，断层图像被分成一系列子图像。 每个子图像被移动到原点，以减少的视图投影，然后被上采样并向后移位（在正弦图空间中）。 然后将所得的正弦图组合以提供单个正弦图。 此过程一次或多次递归应用。 在反投影的上下文中，将上述步骤转置成使得正弦图被划分成一系列子图。 然后通过给定的抽取因子移位和抽取子图。 然后将抽取的子图像反投影到六边形图块上，然后将图块合成为最终图像。

公开(公告)号：US07203267B2

公开(公告)日：2007-04-10

申请号：US10880875

申请日：2004-06-30

Applicant: Bruno Kristiaan Bernard De Man ,  Samit Kumar Basu ,  Jong Chul Ye

Inventor： Bruno Kristiaan Bernard De Man ,  Samit Kumar Basu ,  Jong Chul Ye

IPC: G01N23/00

CPC classification number: G06T11/006 ,  G06T2211/424

Abstract: A technique is provided for CT reconstruction for use in CT metrology. The boundary based CT reconstruction method includes the steps of initializing a boundary of an object to obtain a boundary estimate, defining a forward model based on the boundary estimate, linearizing the forward model to obtain a system matrix and implementing an iterative image reconstruction process using the system matrix to update the boundary estimate.

Abstract translation: 提供CT重建技术用于CT计量。 基于边界的CT重建方法包括初始化对象边界以获得边界估计的步骤，基于边界估计定义正向模型，将前向模型线性化以获得系统矩阵，并使用该方法实现迭代图像重建过程 系统矩阵来更新边界估计。

公开(公告)号：US06937689B2

公开(公告)日：2005-08-30

申请号：US10704179

申请日：2003-11-07

Applicant: Qi Zhao ,  Peter Michael Edic ,  Bruno Kristiaan Bernard De Man ,  Samit Kumar Basu

Inventor： Qi Zhao ,  Peter Michael Edic ,  Bruno Kristiaan Bernard De Man ,  Samit Kumar Basu

IPC: A61B6/03

CPC classification number: A61B6/4014 ,  A61B6/032 ,  A61B6/4085 ,  Y10S378/901

Abstract: 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.

Abstract translation: 一种用于成像对象的方法，包括利用具有分布式x射线源的计算机断层摄影成像设备，以利用预定的采样点获取角度和时间空间中的对象的投影数据的采样。 利用二维线性滤波器对获取的投影数据进行滤波以产生滤波数据，然后反过来的数据被反投影以获得对象的重建图像。