公开(公告)号：US20110211671A1

公开(公告)日：2011-09-01

申请号：US13089874

申请日：2011-04-19

申请人： Zhiqiang Chen ,  Li Zhang ,  Xuewu Wang ,  Haifeng Hu ,  Hongxin Wu ,  Yuanjing Li ,  Yinong Liu ,  Ziran Zhao ,  Yuxiang Xing ,  Hu Tang ,  Yumin Yi ,  Jinyu Zhang

发明人： Zhiqiang Chen ,  Li Zhang ,  Xuewu Wang ,  Haifeng Hu ,  Hongxin Wu ,  Yuanjing Li ,  Yinong Liu ,  Ziran Zhao ,  Yuxiang Xing ,  Hu Tang ,  Yumin Yi ,  Jinyu Zhang

IPC分类号： G01N23/04

CPC分类号： G01N23/10 ,  A61B6/027 ,  G01N23/046 ,  G01N2001/022 ,  G01N2223/419 ,  G01N2223/423 ,  G01N2223/637 ,  G01N2223/639 ,  G01V5/00

摘要： Disclosed are a method and a device for security-inspection of liquid articles with dual-energy CT imaging. The method comprises the steps of obtaining one or more CT images including physical attributes of liquid article to be inspected by CT scanning and a dual-energy reconstruction method; acquiring the physical attributes of each liquid article from the CT image; and determining whether there are drugs concealed in the inspected liquid article based on the difference between the acquired physical attributes and reference physical attributes of the inspected liquid article. The CT scanning can be implemented by a normal CT scanning technique, or a spiral CT scanning technique. In the normal CT scanning technique, the scan position can be preset, or set by the operator with a DR image, or set by automatic analysis of the DR image.

摘要翻译： 公开了一种用于双能CT成像的液体物品的安全检查方法和装置。 该方法包括以下步骤：通过CT扫描获得包括待检查的液体物品的物理属性的一个或多个CT图像和双能量重建方法; 从CT图像获取每个液体物品的物理属性; 并且基于被检查的液体制品的所获取的物理属性和参考物理属性之间的差异来确定在被检查的液体制品中是否存在隐藏的药物。 CT扫描可以通过正常的CT扫描技术或螺旋CT扫描技术来实现。 在正常的CT扫描技术中，扫描位置可以由操作员预先设置，或者通过DR图像设置，或者通过DR图像的自动分析设置。

公开(公告)号：US08009890B2

公开(公告)日：2011-08-30

申请号：US11619242

申请日：2007-01-03

申请人： Akihiko Nishide ,  Akira Hagiwara

发明人： Akihiko Nishide ,  Akira Hagiwara

IPC分类号： G06K9/00

CPC分类号： G06T5/002 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  G06T11/008 ,  G06T2207/10081 ,  G06T2207/20012 ,  G06T2207/30004

摘要： The present invention aims to realize an improvement in image quality of a two-dimensional display extracted from a three-dimensional display image such as continuous tomographic images which tomographic images at a conventional scan or the like of an X-ray CT apparatus having a two-dimensional X-ray area detector of a matrix structure typified by a multi-row X-ray detector or a flat panel X-ray detector are arranged in a z direction corresponding to an imaging table travel direction. For the purpose, an image display apparatus of the present invention comprises image filter processing device for preforming a image filter processing on the three-dimensional image, wherein said image filter process varies depending on a cross sectional direction of said two-dimensional image to be displayed.

摘要翻译： 本发明旨在实现从三维显示图像提取的二维显示图像质量的提高，所述三维显示图像例如是具有两个X射线CT装置的常规扫描等的断层图像的连续断层图像 以X射线检测器或平板X射线检测器为代表的矩阵结构的X维面积检测器以对应于成像台行进方向的方向配置。 为此，本发明的图像显示装置包括用于对三维图像进行图像滤波处理的图像滤波处理装置，其中所述图像滤波处理根据所述二维图像的横截面方向而变化， 显示。

公开(公告)号：US20110208046A1

公开(公告)日：2011-08-25

申请号：US13101216

申请日：2011-05-05

申请人： Marcela Gonzalez Molezzi ,  Holly Ann McDaniel ,  Scott Eugene Trevino

发明人： Marcela Gonzalez Molezzi ,  Holly Ann McDaniel ,  Scott Eugene Trevino

IPC分类号： A61B6/00

CPC分类号： A61B6/481 ,  A61B5/055 ,  A61B5/7285 ,  A61B6/027 ,  A61B6/03 ,  A61B6/541 ,  A61B8/481 ,  A61B8/543

摘要： A system and method are provided for determining individualized scan and injection protocols for contrast-enhanced diagnostic imaging. Taking into account parameters specific to the scan subject, injection-related parameters, and scan parameters, the system and method can determine an optimal timing for a scan sequence to begin, to ensure that the scan sequence coincides with a desired contrast enhancement. Some embodiments further provide for real-time triggering of the scan commencement based on bolus tracking, and can adapt the scan and injection protocols in real-time based on monitored dynamic scan subject parameters and/or actual enhancement values determined from image data.

摘要翻译： 提供了用于确定用于对比度增强的诊断成像的个体化扫描和注射协议的系统和方法。 考虑到扫描对象特定的参数，注射相关参数和扫描参数，系统和方法可以确定扫描序列开始的最佳定时，以确保扫描序列与期望的对比度增强一致。 一些实施例进一步提供了基于推注跟踪的扫描开始的实时触发，并且可以基于从图像数据确定的所监视的动态扫描对象参数和/或实际增强值来实时地适配扫描和注射协议。

公开(公告)号：US20110188725A1

公开(公告)日：2011-08-04

申请号：US13059579

申请日：2009-09-02

申请人： Lifeng Yu ,  Cynthia H. Mccollough

发明人： Lifeng Yu ,  Cynthia H. Mccollough

IPC分类号： G06K9/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  G06T2211/408

摘要： A system and method for the accurate quantitative evaluation of dual-energy computed tomography (CT) projection data that is acquired in a dual-source helical scan includes employing a dual-source z-axis helical interpolation method. The method includes transforming the two helical projection data sets, where corresponding projections of high- and low-energy data sets are shifted with respect to one another by 90 degrees or another angle, into corresponding non-helical projection data sets. A dual-source helical interpolation algorithm allows for projection space dual-energy processing by realigning the high- and low-energy datasets based on the z-axis interpolation. This algorithm may be implemented using a variety of interpolation schemes and can be extended from single slice to multi-slice data acquisitions. Subsequent to the registration of the non-helical projection data sets, projection space processing allows for accurate material quantification and virtual monochromatic images in which beam hardening artifacts have been substantially suppressed.

摘要翻译： 用于在双源螺旋扫描中获取的双能量计算机断层摄影（CT）投影数据的精确定量评估的系统和方法包括采用双源z轴螺旋插值方法。 该方法包括对两个螺旋投影数据集进行变换，其中高能数据集和低能数据集的相应投影相对于彼此偏移了90度或另一个角度，转换为相应的非螺旋投影数据集。 双源螺旋插值算法允许通过基于z轴插值重新对齐高能量和低能量数据集进行投影空间双能量处理。 该算法可以使用各种插值方案来实现，并且可以从单片扩展到多片数据采集。 在非螺旋投影数据集的注册之后，投影空间处理允许精确的材料量化和虚拟单色图像，其中束固化伪影已被基本上抑制。

公开(公告)号：US20110182400A1

公开(公告)日：2011-07-28

申请号：US13120660

申请日：2009-10-05

申请人： Peter Forthmann ,  Thomas Koehler ,  Udo Van Stevendaal ,  Matthias Bertram ,  Steffen Wiesner ,  Colas Schretter

发明人： Peter Forthmann ,  Thomas Koehler ,  Udo Van Stevendaal ,  Matthias Bertram ,  Steffen Wiesner ,  Colas Schretter

IPC分类号： A61B6/03 ,  G01N23/04

CPC分类号： A61B6/032 ,  A61B5/107 ,  A61B6/027

摘要： A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source (102) and a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data. The amount of transverse displacement may be determined based on the size of the object (108). The source and the detector may be adjusted to vary the size of the transverse field of view. The first data set acquired by the detector may be reconstructed and used to simulate missing projection data that could not be acquired by the detector at each projection angle. The measured projection data and the simulated projection data may be used to obtain a second data set. The second data set may be compared to the first data set to produce a corrected data set.

摘要翻译： 提供了一种方法和装置，用于改善使用位移采集几何形状的CT图像采集。 可以使用CT装置，在获取投影数据期间具有从视场（118）的中心（114）横向移位的源（102）和检测器（104）。 可以基于物体（108）的尺寸来确定横向位移量。 源和检测器可以被调节以改变横向视场的大小。 由检测器获取的第一数据集可以被重构并用于模拟在每个投影角度不能由检测器获取的丢失的投影数据。 所测量的投影数据和模拟投影数据可用于获得第二数据集。 可以将第二数据集与第一数据集进行比较以产生校正数据集。

公开(公告)号：US07983385B2

公开(公告)日：2011-07-19

申请号：US12441916

申请日：2007-09-11

申请人： Dominic J. Heuscher ,  Randall P. Luhta ,  Steven J. Utrup

发明人： Dominic J. Heuscher ,  Randall P. Luhta ,  Steven J. Utrup

IPC分类号： A61B6/00

CPC分类号： A61B6/4085 ,  A61B6/027 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4028 ,  A61B6/541

摘要： A computed tomography system (100) includes an x-ray source (112) that rotates about an examination region (108) and translates along a longitudinal axis (120). The x-ray source (112) remains at a first location on the longitudinal axis (120) while rotating about the examination region (108), accelerates to a scanning speed and performs a fly-by scan of a region of interest (220) in which at least one hundred and eighty degrees plus a fan angle of data is acquired. At least one detector (124) detects x-rays radiated by the x-ray source (112) that traverses the examination region (108) and generates signals indicative thereof. A reconstructor (132) reconstructs the signals to generate volumetric image data.

摘要翻译： 计算机断层摄影系统（100）包括围绕检查区域（108）旋转并沿着纵向轴线（120）平移的x射线源（112）。 当围绕检查区域（108）旋转时，X射线源（112）保持在纵向轴线（120）上的第一位置，加速到扫描速度并执行感兴趣区域（220）的飞越扫描， 其中至少有一百八十度加上数据的扇角。 至少一个检测器（124）检测穿过检查区域（108）的x射线源（112）辐射的X射线，并产生指示其的信号。 重建器（132）重建信号以产生体积图像数据。

公开(公告)号：US20110170757A1

公开(公告)日：2011-07-14

申请号：US12930856

申请日：2011-01-19

申请人： Xiaochuan Pan ,  Yu Zou ,  Lifeng Yu ,  Chien-Min Kao ,  Martin King ,  Maryellen Giger ,  Dan Xia ,  Howard Halpern ,  Charles Pelizzari ,  Emil Y. Sidky ,  Seungryong Cho

发明人： Xiaochuan Pan ,  Yu Zou ,  Lifeng Yu ,  Chien-Min Kao ,  Martin King ,  Maryellen Giger ,  Dan Xia ,  Howard Halpern ,  Charles Pelizzari ,  Emil Y. Sidky ,  Seungryong Cho

IPC分类号： G06K9/00

CPC分类号： A61B6/5288 ,  A61B6/027 ,  A61B6/032 ,  A61B6/037 ,  A61B6/484 ,  A61B6/508 ,  A61B6/5264 ,  A61B6/583 ,  A61B6/587

摘要： A method and apparatus for reconstruction of a region of interest for an object is provided. The reconstruction of the object may be based on chords which may fill a part, all, or more than all of the region of interest. Using chords for reconstruction may allow for reducing data acquired and/or processing for reconstructing a substantially exact image of the ROI. Moreover, various methodologies may be used in reconstructing the image, such as backprojection-filtration, and modified filtration backprojection.

摘要翻译： 提供了一种用于重建对象的感兴趣区域的方法和装置。 对象的重建可以基于可以填充所有感兴趣区域的全部或全部的和弦。 使用和弦进行重建可以允许减少获得的数据和/或用于重建ROI的基本上精确的图像的处理。 此外，各种方法可用于重建图像，例如反投影过滤和修改过滤反投影。

公开(公告)号：US07949090B2

公开(公告)日：2011-05-24

申请号：US12241579

申请日：2008-09-30

申请人： Akira Hagiwara ,  Tsuyoshi Ogata

发明人： Akira Hagiwara ,  Tsuyoshi Ogata

IPC分类号： A61B6/03

CPC分类号： G06T11/006 ,  A61B6/027 ,  A61B6/035 ,  A61B6/04

摘要： An X-ray CT apparatus is provided for reducing the amount of computation at image reconstruction thereby to shorten an image reconstruction time. The X-ray CT apparatus comprises a cradle which moves in a horizontal direction to convey a subject to a photography space, an X-ray detector comprising a plurality of detecting element rows, for obtaining projection data by a helical scan when the cradle is moved under acceleration/deceleration and at a constant velocity, and backprojection processing device for performing a backprojection process on the projection data. When image reconstruction is carried out using the projection data acquired when the cradle is moved under acceleration/deceleration, the backprojection processing device assumes a virtual image reconstruction plane P′ where the cradle is assumed to be moved at the constant velocity, with respect to an image reconstruction plane P of each view and backprojects projection data onto the virtual image reconstruction plane P′.

摘要翻译： 提供一种用于减少图像重建时的计算量的X射线CT装置，从而缩短图像重建时间。 所述X射线CT装置包括在水平方向上移动以将受试者传送到摄影空间的支架，包括多个检测元件行的X射线检测器，用于当所述支架移动时通过螺旋扫描获得投影数据 在加速/减速和恒定速度下，以及用于对投影数据执行反投影处理的反投影处理装置。 当使用在支架在加速/减速下移动时获取的投影数据进行图像重建时，反投影处理装置假设虚拟图像重构平面P'，其中假定托架以恒定速度移动，相对于 每个视图的图像重构平面P和后投影数据投影到虚像重建平面P'上。

公开(公告)号：US20110110486A1

公开(公告)日：2011-05-12

申请号：US12616043

申请日：2009-11-10

申请人： Jean-Paul Bouhnik ,  Yaron Hefetz

发明人： Jean-Paul Bouhnik ,  Yaron Hefetz

IPC分类号： H05G1/60

CPC分类号： A61B6/032 ,  A61B5/7289 ,  A61B6/027 ,  A61B6/035 ,  A61B6/037 ,  A61B6/0457 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/503 ,  A61B6/5205 ,  A61B6/5235 ,  A61B6/5247 ,  A61B6/541

摘要： Apparatus and methods for computed tomography (CT) imaging are provided. One method includes providing a patient table to move along an examination axis of a rotating gantry of a CT imaging system having at least one imaging detector. The imaging detector includes a pixelated detector array. The method further includes configuring the CT imaging system to perform an overlapping helical CT scan by controlling a speed of the moving patient table along the examination axis through a field of view (FOV) of the at least one imaging detector of the rotating gantry.

摘要翻译： 提供了计算机断层摄影（CT）成像的装置和方法。 一种方法包括提供患者台沿着具有至少一个成像检测器的CT成像系统的旋转机架的检查轴线移动。 成像检测器包括像素化检测器阵列。 该方法还包括配置CT成像系统，以通过旋转机架的至少一个成像检测器的视场（FOV）控制沿着检查轴的移动患者台的速度来执行重叠的螺旋CT扫描。

公开(公告)号：US07936858B2

公开(公告)日：2011-05-03

申请号：US12045530

申请日：2008-03-10

申请人： Ali Bani Hashemi ,  Jonathan S. Maltz

发明人： Ali Bani Hashemi ,  Jonathan S. Maltz

IPC分类号： A61B6/00 ,  A61N5/10

CPC分类号： A61B6/025 ,  A61B6/027 ,  A61B6/4007 ,  A61B6/54 ,  A61N2005/1061

摘要： A system and method for tomosynthesis, the method including emitting a respective imaging x-ray from each of a plurality of imaging x-ray sources disposed in a fixed relation with respect to one another, acquiring x-ray absorption projections of an object, each of the x-ray absorption projections associated with an imaging x-ray emitted by a respective one of the plurality of imaging x-ray sources, and performing digital tomosynthesis using the x-ray absorption projections to generate a cross-sectional image of the object.

摘要翻译： 一种用于层析合成的系统和方法，所述方法包括从以相对于彼此固定关系设置的多个成像x射线源中的每一个发射相应的成像x射线，获取物体的x射线吸收投影，每个 与由所述多个成像x射线源中的相应一个发射的成像x射线相关联的X射线吸收投影，以及使用所述x射线吸收投影进行数字断层合成以产生所述物体的横截面图像 。