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    Methods and systems for dynamic pitch helical scanning
    1.
    发明申请
    Methods and systems for dynamic pitch helical scanning 有权
    动态俯仰螺旋扫描的方法和系统

    公开(公告)号：US20070110211A1

    公开(公告)日：2007-05-17

    申请号：US11273851

    申请日：2005-11-15

    申请人： Jiang Hsieh ,  Alexander Katsevich ,  Samit Basu

    发明人： Jiang Hsieh ,  Alexander Katsevich ,  Samit Basu

    IPC分类号： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12 ,  G21K1/02

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/06 ,  G21K1/04

    摘要： Methods and systems for controlling x-ray exposure during a dynamic pitch helical scan using a translatable table are provided. The system includes a collimator positioned between an x-ray source and an object to be scanned configured to shutter an x-ray fan beam generated by the x-ray source to at least one of translate the x-ray fan beam along a z-axis of the scan and vary the width of the x-ray beam along the z-axis, and a collimator controller configured to dynamically position the collimator using at least one of predetermined trajectory of the translatable table and a current position of the translatable table.

    摘要翻译： 提供了使用可平移表在动态俯仰螺旋扫描期间控制X射线曝光的方法和系统。 该系统包括准直器，该准直器定位在x射线源和要被扫描的物体之间，其被构造成将由x射线源产生的X射线扇形光束快门以将X射线扇形光束沿Z轴平移， 并且沿着z轴改变x射线束的宽度，以及准直器控制器，被配置为使用可平移台的预定轨迹和可平移表的当前位置中的至少一个来动态地定位准直器。

    System and method for reconstruction of cone beam tomographic projections with missing data
    2.
    发明申请
    System and method for reconstruction of cone beam tomographic projections with missing data 有权
    用于重建具有丢失数据的锥束断层摄影投影的系统和方法

    公开(公告)号：US20060062443A1

    公开(公告)日：2006-03-23

    申请号：US10948663

    申请日：2004-09-23

    申请人： Samit Basu ,  Bruno Bernard Deman

    发明人： Samit Basu ,  Bruno Bernard Deman

    IPC分类号： G06K9/00 ,  G06K9/40

    CPC分类号： G06T11/005 ,  G06T2211/424 ,  Y10S378/901

    摘要： A method for reconstructing image data from acquired tomographic projection data measurements is provided. The projection data measurements comprise one or more missing data measurements. The method comprises generating a coarse-resolution projection data set from the acquired projection data measurements and performing an iterative reconstruction on the coarse-resolution projection data set to generate a coarse-resolution reconstructed data set. Then, the method comprises reprojecting the coarse-resolution reconstructed data set to obtain one or more estimates for the one or more missing data measurements. The one or more estimated missing data measurements are then recombined with the acquired projection data measurements, to generate a recombined data set. Then, a direct reconstruction algorithm is applied to the recombined data set to generate the reconstructed image data.

    摘要翻译： 提供了一种从获取的断层摄影投影数据测量重建图像数据的方法。 投影数据测量包括一个或多个丢失的数据测量。 该方法包括从所获取的投影数据测量中产生粗分辨率投影数据集，并对粗分辨率投影数据集执行迭代重建以产生粗分辨率重建数据集。 然后，该方法包括重新投影粗分辨率重构数据集以获得一个或多个丢失数据测量的一个或多个估计。 然后将一个或多个估计的丢失数据测量与所获取的投影数据测量重组，以产生重组数据集。 然后，将直接重建算法应用于重组数据集，以生成重构图像数据。

    Method and apparatus for employing multiple axial-sources
    3.
    发明申请
    Method and apparatus for employing multiple axial-sources 失效
    采用多个轴向源的方法和装置

    公开(公告)号：US20050135550A1

    公开(公告)日：2005-06-23

    申请号：US10744027

    申请日：2003-12-23

    申请人： Bruno Man ,  Samit Basu

    发明人： Bruno Man ,  Samit Basu

    IPC分类号： A61B6/03 ,  G21K1/02 ,  A61B6/00 ,  G21K1/12

    CPC分类号： A61B6/032 ,  A61B6/4014 ,  G21K1/025

    摘要： A technique is provided for improving z-axis coverage and/or reducing cone beam artifacts during CT imaging. Multiple X-ray emission points are provided along the z-axis. Some or all of the emission points may be concurrently active. X-rays from concurrently active emission points are collimated so that X-rays from two or more emission points do not overlap on the detector. In addition, different groups of concurrently activated emission points may be sequentially or alternately activated, in conjunction with collimation, to prevent the overlap of X-rays from different emission points on the detector. In this manner, The X-rays may be timed and collimated such that the respective streams of radiation become adjacent at different locations, such as at the detector, the isocenter, or edge of the field of view.

    摘要翻译： 提供了一种用于在CT成像期间改善z轴覆盖和​​/或减少锥束伪影的技术。 沿z轴提供多个X射线发射点。 一些或所有发射点可以同时有效。 来自同时有效发射点的X射线被准直，使得来自两个或更多个发射点的X射线在检测器上不重叠。 此外，不同组的同时激活的发射点可以与准直相关或交替地激活，以防止来自检测器上不同发射点的X射线的重叠。 以这种方式，X射线可以被定时和准直，使得相应的辐射流在诸如检测器，等角点或视场边缘的不同位置处相邻。

    System and method for detecting an object by dynamically adjusting computational load
    5.
    发明申请
    System and method for detecting an object by dynamically adjusting computational load 有权
    通过动态调整计算负荷来检测物体的系统和方法

    公开(公告)号：US20050031069A1

    公开(公告)日：2005-02-10

    申请号：US10737887

    申请日：2003-12-18

    申请人： Robert Kaucic ,  Ricardo Avila ,  Samit Basu ,  Forrest Hopkins

    发明人： Robert Kaucic ,  Ricardo Avila ,  Samit Basu ,  Forrest Hopkins

    IPC分类号： G01V5/00 ,  G21K1/12 ,  A61B6/00 ,  G01N23/00 ,  G01N23/04 ,  H05G1/60

    CPC分类号： G01V5/0016 ,  G01V5/005 ,  Y10S378/901

    摘要： A system and method for ascertaining the identity of an object within an enclosed article. The system includes an acquisition subsystem, a reconstruction subsystem, a computer-aided detection (CAD) subsystem, and an alarm resolution subsystem. The acquisition subsystem communicates view data to the reconstruction subsystem, which reconstructs it into image data and communicates it to the CAD subsystem. The CAD subsystem analyzes the image data to ascertain whether it contains any area of interest. A feedback loop between the reconstruction and CAD subsystems allows for continued, more extensive analysis of the object. Other information, such as risk variables or trace chemical detection information may be communicated to the CAD subsystem to dynamically adjust the computational load of the analysis.

    摘要翻译： 用于确定封闭物品内物体的身份的系统和方法。 该系统包括采集子系统，重建子系统，计算机辅助检测（CAD）子系统和报警解析子系统。 采集子系统将视图数据传送到重建子系统，将其重建为图像数据并将其传送到CAD子系统。 CAD子系统分析图像数据，以确定它是否包含任何感兴趣的区域。 重建和CAD子系统之间的反馈循环允许对对象进行持续更广泛的分析。 其他信息，如风险变量或痕量化学检测信息可以传达给CAD子系统，以动态调整分析的计算负荷。

    Systems and methods for imaging and detecting sheet-like material
    6.
    发明授权
    Systems and methods for imaging and detecting sheet-like material 有权
    用于成像和检测片状材料的系统和方法

    公开(公告)号：US09134258B2

    公开(公告)日：2015-09-15

    申请号：US13542732

    申请日：2012-07-06

    申请人： Samit Basu ,  Todd Jason Gable

    发明人： Samit Basu ,  Todd Jason Gable

    IPC分类号： G06K9/52 ,  G01N23/04 ,  G06T7/00 ,  G01N23/16 ,  G01N23/083 ,  G01V5/00

    CPC分类号： G01N23/046 ,  G01N23/083 ,  G01N23/16 ,  G01N2223/419 ,  G01V5/005 ,  G06K9/52 ,  G06K2209/09 ,  G06T7/0004 ,  G06T2207/30112

    摘要： A method for imaging an object is provided. The method includes acquiring image data of the object, wherein the image data includes a plurality of original voxels, and identifying, using a processing device, a first subset of voxels from the acquired image data. The method also includes performing a principal component analysis (PCA) on the first subset of voxels and determining whether sheet-like material is present in the object based on the results of the performed PCA on the first subset of voxels.

    摘要翻译： 提供了一种用于成像对象的方法。 所述方法包括获取所述对象的图像数据，其中所述图像数据包括多个原始体素，以及使用所述处理设备从所获取的图像数据识别体素的第一子集。 该方法还包括在体素的第一子集上执行主成分分析（PCA），并且基于在第一子体体素上执行的PCA的结果来确定片状材料是否存在于对象中。

    SYSTEMS AND METHODS FOR IMAGING AND DETECTING SHEET-LIKE MATERIAL
    7.
    发明申请
    SYSTEMS AND METHODS FOR IMAGING AND DETECTING SHEET-LIKE MATERIAL 有权
    用于成像和检测薄片材料的系统和方法

    公开(公告)号：US20140010342A1

    公开(公告)日：2014-01-09

    申请号：US13542732

    申请日：2012-07-06

    申请人： Samit Basu ,  Todd Jason Gable

    发明人： Samit Basu ,  Todd Jason Gable

    IPC分类号： G01N23/04 ,  G06K9/00

    CPC分类号： G01N23/046 ,  G01N23/083 ,  G01N23/16 ,  G01N2223/419 ,  G01V5/005 ,  G06K9/52 ,  G06K2209/09 ,  G06T7/0004 ,  G06T2207/30112

    摘要： A method for imaging an object is provided. The method includes acquiring image data of the object, wherein the image data includes a plurality of original voxels, and identifying, using a processing device, a first subset of voxels from the acquired image data. The method also includes performing a principal component analysis (PCA) on the first subset of voxels and determining whether sheet-like material is present in the object based on the results of the performed PCA on the first subset of voxels.

    摘要翻译： 提供了一种用于成像对象的方法。 所述方法包括获取所述对象的图像数据，其中所述图像数据包括多个原始体素，以及使用所述处理设备从所获取的图像数据识别体素的第一子集。 该方法还包括在体素的第一子集上执行主成分分析（PCA），并且基于在第一子体体素上执行的PCA的结果来确定片状材料是否存在于对象中。

    Methods and system for selective resolution improvement in computed tomography
    8.
    发明授权
    Methods and system for selective resolution improvement in computed tomography 有权
    计算机断层扫描中选择性分辨率改善的方法和系统

    公开(公告)号：US08254656B2

    公开(公告)日：2012-08-28

    申请号：US12578196

    申请日：2009-10-13

    申请人： Eugene Alex Ingerman ,  Samit Basu ,  Jed Pack ,  Todd Gable

    发明人： Eugene Alex Ingerman ,  Samit Basu ,  Jed Pack ,  Todd Gable

    IPC分类号： G06K9/00 ,  G01N23/04

    CPC分类号： G06T7/0004 ,  A61B6/027 ,  G01N23/046 ,  G01N2223/419 ,  G01V5/005 ,  G06K2209/09 ,  G06T11/006 ,  G06T2207/10081 ,  G06T2207/20016 ,  G06T2207/30112 ,  G06T2211/416

    摘要： A method and system for selective resolution improvement in computed tomography (CT) scanning. The method includes receiving scan data representative of a scanned object from a CT scanner and reconstructing the scan data using a first algorithm to create a first set of reconstructed data. A region of interest is identified within the first set of reconstructed data. A portion of the scan data corresponding to the region of interest is reconstructed using a second algorithm to create a second set of reconstructed data. The first set of reconstructed data and the second set of reconstructed data are combined to create combined reconstructed data.

    摘要翻译： 一种用于计算机断层扫描（CT）扫描中选择性分辨率改进的方法和系统。 该方法包括从CT扫描器接收表示扫描对象的扫描数据，并使用第一算法重建扫描数据，以创建第一组重构数据。 在第一组重建数据内识别感兴趣区域。 使用第二算法重建与感兴趣区域相对应的扫描数据的一部分，以创建第二组重建数据。 将第一组重建数据和第二组重建数据组合以创建组合重建数据。

    Method and apparatus for generating temporally interpolated projections
    9.
    发明授权
    Method and apparatus for generating temporally interpolated projections 有权
    用于产生时间内插投影的方法和装置

    公开(公告)号：US07813473B2

    公开(公告)日：2010-10-12

    申请号：US10625321

    申请日：2003-07-23

    申请人： Peter Michael Edic ,  Bruno De Man ,  Samit Basu

    发明人： Peter Michael Edic ,  Bruno De Man ,  Samit Basu

    IPC分类号： A61B6/03 ,  H05G1/62

    CPC分类号： A61B6/4028 ,  A61B6/032 ,  A61B6/503 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612 ,  G06T7/246 ,  G06T11/005 ,  G06T2211/412

    摘要： A technique is provided for the temporal interpolation of a projection data set acquired of a dynamic object, such as a heart. The projection data set is acquired using a slowly rotating gantry and a distributed X-ray source. The projection data may be interpolated at each view position to a selected instant of time, such as relative to a cardiac phase. The resulting interpolated projection data characterize the projection data at each view location at any instant in time. The set of interpolated projection data may then be reconstructed to generate images and/or volume with improved temporal resolution.

    摘要翻译： 提供了用于对诸如心脏的动态对象获取的投影数据集的时间插值的技术。 使用缓慢旋转的台架和分布式X射线源获取投影数据集。 投影数据可以在每个视图位置被内插到所选择的时刻，例如相对于心脏相位。 所产生的内插投影数据在任何时刻在每个视图位置表征投影数据。 然后，可以对该组内插投影数据进行重建，以产生具有改进的时间分辨率的图像和/或体积。