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    • 23. 发明授权
    • Method and device for the iterative reconstruction of cardiac images
    • 心脏图像重复重建的方法和装置
    • US07596204B2
    • 2009-09-29
    • US11908415
    • 2006-03-09
    • Andy ZieglerMichael GrassThomas Koehler
    • Andy ZieglerMichael GrassThomas Koehler
    • A61B6/00
    • G06T11/006A61B6/027G06T2211/424
    • The invention relates to a method and a device for the iterative reconstruction of cross-sectional images of the heart (7) of a patient based on projections (P1, . . . P5) from different directions which are for example generated with a helical cone-beam CT scanner. A cardiac weight function (f) quantifies how near the projections (P1, . . . ) are to a given observation phase (To) of the heart cycle based on simultaneously recorded electrocardiographic signals (ECG). The whole set of projections (P1, . . . ) is divided into subsets (S1, . . . ) which each contain only projections corresponding to a similar cardiac weight (f), and an iterative reconstruction algorithm like ART uses in one update or iteration step all projections of such a subset (S1, . . . ) simultaneously.
    • 本发明涉及一种用于基于来自不同方向的投影(P1,...,P5)迭代重建患者心脏(7)的横截面图像的方法和装置,其例如用螺旋锥体 光束CT扫描仪。 心脏重量函数(f)基于同时记录的心电图信号(ECG)量化投影(P1,...)附近的心脏周期的给定观察阶段(To)附近。 整个投影组(P1 ...)分为子集(S1,...),每个子集只包含与相似的心脏重量(f)相对应的投影,像ART这样的迭代重建算法在一个更新或 迭代步骤同时对所述子集(S1,...)进行所有投影。
    • 25. 发明申请
    • IMAGING SYSTEM
    • 成像系统
    • US20090208077A1
    • 2009-08-20
    • US12438559
    • 2007-08-28
    • Claas BontusMichael GrassThomas Koehler
    • Claas BontusMichael GrassThomas Koehler
    • G06K9/00A61B6/03
    • A61B6/032A61B6/027
    • The present invention relates to an imaging system for imaging a field of interest, in particular to a computed tomography system. The imaging system comprises an irradiation unit (2) which moves relative to a field of interest along a first trajectory (501) and along a second trajectory (503). While the irradiation unit (2) moves along the first trajectory (501), first detection data are acquired and, while the irradiation unit (2) moves along the second trajectory (503), second detection data are acquired. An intermediate image of the field of interest is reconstructed from at least the second detection data, and virtual detection data are determined by forward projection through the intermediate image. Finally, an image of the field of interest is reconstructed from the first detection data and the virtual detection data.
    • 本发明涉及用于对感兴趣的领域,特别是计算机断层摄影系统进行成像的成像系统。 成像系统包括沿着第一轨迹(501)并沿第二轨迹(503)相对于感兴趣的场移动的照射单元(2)。 当照射单元(2)沿着第一轨迹(501)移动时,获取第一检测数据,并且当照射单元(2)沿着第二轨迹(503)移动时,获取第二检测数据。 至少从第二检测数据重建感兴趣区域的中间图像,并且通过中间图像的向前投影确定虚拟检测数据。 最后,从第一检测数据和虚拟检测数据重建感兴趣区域的图像。