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    • 51. 发明授权
    • Methods, apparatus and articles of manufacture to monitor communication paths in communication systems
    • 用于监测通信系统中的通信路径的方法,装置和制品
    • US08279771B2
    • 2012-10-02
    • US12567312
    • 2009-09-25
    • Zhijian XuChee ChingKevin D'SouzaJoseph LuDavid H. LuChen-Yui YangLeah Li Zhang
    • Zhijian XuChee ChingKevin D'SouzaJoseph LuDavid H. LuChen-Yui YangLeah Li Zhang
    • H04L12/28
    • H04L43/0811H04L41/12H04L43/0817H04L43/50H04L45/00H04L45/04
    • Example methods, apparatus and articles of manufacture to monitor communication paths in communication systems are disclosed. A disclosed example method includes identifying first and second inter-network communication links of a communication system, identifying a first plurality of router pairs associated with the first inter-network communication link, identifying a second plurality of router pairs associated with the second inter-network communication link, partitioning the first plurality of router pairs into a first subset of router pairs and a second subset of router pairs, partitioning the second plurality of router pairs into a third subset of router pairs and a fourth subset of router pairs, during a first time interval, performing first reachability tests for respective ones of the first and third subsets of router pairs, and during a second time interval, performing second reachability tests for respective ones of the second and fourth subsets of router pairs.
    • 公开了用于监测通信系统中的通信路径的示例性方法,装置和制造品。 所公开的示例性方法包括识别通信系统的第一和第二网络间通信链路,识别与第一网络间通信链路相关联的第一多个路由器对,识别与第二网络间相关联的第二多个路由器对 通信链路,将所述第一多个路由器对划分成路由器对的第一子集和路由器对的第二子集,在所述第一子集中的所述第一组路由器对中,将所述第二多个路由器对划分为路由器对的第三子集和路由器对的第四子集, 时间间隔,对路由器对的第一和第三子集中的各个进行第一可达性测试,并且在第二时间间隔期间,为路由器对的第二和第四子集中的相应的一个进行第二可达性测试。
    • 56. 发明申请
    • Computer Tomography Imaging Device and Method
    • 计算机断层扫描成像装置及方法
    • US20120140874A1
    • 2012-06-07
    • US13322696
    • 2009-12-30
    • Liang LiZhiqiang ChenLi ZhangKejun KangYuanjing LiYinong LiuYuxiang XingZiran Zhao
    • Liang LiZhiqiang ChenLi ZhangKejun KangYuanjing LiYinong LiuYuxiang XingZiran Zhao
    • A61B6/03A61B6/08
    • A61B6/032A61B6/06A61B6/4452A61B6/469G06T11/006G06T2211/416G06T2211/421G06T2211/424
    • The present invention discloses a method for performing CT imaging on a region of interest of an object under examination, comprising: acquiring the CT projection data of the region of interest; acquiring the CT projection data of region B; selecting a group of PI line segments covering the region of interest, and calculating the reconstruction image value for each PI line segment in the group; and combining the reconstruction image values in all the PI line segments to obtain the image of the region of interest. The present invention further discloses a CT imaging device using this method and a data processor therein. Since the 2D/3D slice image of the region of interest can be exactly reconstructed and obtained as long as the X-ray beam covers the region of interest and the region B, it is possible to use a small-sized detector to perform CT imaging on the region of interest at any position of a large-sized object, which reduces to a great extent the radiation dose of the X-ray during the CT scanning.
    • 本发明公开了一种对被检查物体的感兴趣区域进行CT成像的方法,包括:获取感兴趣区域的CT投影数据; 获取区域B的CT投影数据; 选择覆盖感兴趣区域的一组PI线段,并计算组中每个PI线段的重建图像值; 并且将所有PI线段中的重建图像值组合以获得感兴趣区域的图像。 本发明还公开了一种使用该方法的CT成像装置及其中的数据处理器。 由于只要X射线束覆盖感兴趣区域和区域B,就可以精确地重构和获得感兴趣区域的2D / 3D切片图像,因此可以使用小尺寸检测器来执行CT成像 在大尺寸物体的任何位置处的感兴趣区域,其在CT扫描期间在很大程度上降低X射线的辐射剂量。