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    • 8. 发明公开
    • DISTRIBUTION ANALYZING DEVICE AND DISTRIBUTION ANALYZING METHOD
    • VERTEILUNGSANALYSEVORRICHTUNG UND VERTEILUNGSANALYSEVERFAHREN
    • EP2960668A4
    • 2017-02-15
    • EP14753850
    • 2014-02-13
    • NAT UNIV CORP KOBE UNIV
    • KIMURA KENJIRO
    • G01R33/10G01R29/14
    • G01R33/10
    • A distribution analyzing device (20) includes: an obtaining unit (21) which obtains measurement data of a field measured, through a sensor sensing area, independently at each of rotation angles and at each of grid coordinate positions of the sensor sensing area; and a calculation unit (22) which calculates a distribution of the field from the measurement data, using an arithmetic expression obtained by deriving a target harmonic function, which indicates the distribution of the field, using a condition that a convolution of the target harmonic function and a shape function, which indicates a shape of a cross section of the finite sensor sensing area along a plane parallel to the measurement plane, is equal to a provisional harmonic function derived by solving the Laplace equation using the measurement data and a size of the sensor sensing area in a direction perpendicular to the measurement plane.
    • 分布分析装置(20)包括:获取单元(21),其通过传感器感测区域独立地获得传感器感测区域的每个旋转角度和每个网格坐标位置处测量的场的测量数据; 以及计算单元(22),其使用通过导出表示场的分布的目标谐波函数获得的算术表达式,使用目标谐波函数的卷积来计算来自测量数据的场的分布 并且指示沿着与测量平面平行的平面的有限传感器感测区域的横截面的形状的形状函数等于通过使用测量数据求解拉普拉斯方程而导出的临时谐波函数, 传感器感测区域在垂直于测量平面的方向上。
    • 9. 发明公开
    • MPI scanner with moving permanent magnetic elements
    • MPI-Abtaster mit beweglichen永磁体元素
    • EP3048452A1
    • 2016-07-27
    • EP15152127.5
    • 2015-01-22
    • Bruker BioSpin MRI GmbH
    • Heinen, UlrichFranke, Jochen
    • G01R33/02A61B5/05G01R33/10G01R33/12G01N27/72
    • An MPI-apparatus comprising a magnet system for generating a time-varying and position-dependent magnetic field and a detection system detecting signals from MPI contrast agents exposed to said magnetic field within a detection volume, said signals being suitable for reconstructing an image of the spatial and temporal distribution of said MPI contrast agents, is characterized in that the magnet system comprises an array with a plurality of permanent magnetic elements geometrically arranged in such a way that at least a part of the plurality of permanent magnetic elements are moved with sufficient speed in the vicinity of the detection volume to create the spatial and temporal magnetic field variations for inducing within the contrast agent the MPI signals recorded by the detection system. This avoids the high power requirements of current MPI scanners, while opening the way for higher spatial resolutions and variable scanning frequencies.
    • 一种MPI装置,包括用于产生时变和位置相关磁场的磁体系统,以及检测系统,其检测暴露于检测体积内的所述磁场的MPI造影剂的信号,所述信号适用于重建 所述MPI造影剂的空间和时间分布的特征在于,所述磁体系统包括具有多个永久磁性元件的阵列,所述永久磁性元件几何地布置成使得所述多个永磁体的至少一部分以足够的速度移动 在检测体积附近,以产生用于在造影剂内诱导由检测系统记录的MPI信号的空间和时间磁场变化。 这避免了当前MPI扫描仪的高功率要求,同时为更高的空间分辨率和可变扫描频率开辟了道路。