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    Method of exact image reconstruction for cone beam tomography with arbitrary source trajectory
    3.
    发明申请
    Method of exact image reconstruction for cone beam tomography with arbitrary source trajectory 审中-公开
    具有任意源轨迹的锥束断层扫描精确图像重建方法

    公开(公告)号：US20160223475A1

    公开(公告)日：2016-08-04

    申请号：US14608245

    申请日：2015-01-29

    申请人： Victor Palamodov

    发明人： Victor Palamodov

    IPC分类号： G01N23/04 ,  G06T11/00

    CPC分类号： G06T11/005 ,  G01N2223/401 ,  G01N2223/419 ,  G06T11/006 ,  G06T2211/416

    摘要： The invention provides a reconstruction algorithm based on a theoretically exact analytic inversion formula that can be applied for cone beam data collected from the object that have been scanned by a moving source of radiation with two-dimensional array of detectors.The said algorithm is applicable for arbitrary source trajectory that satisfies the completeness condition. The algorithm does not depend on the trajectory except for a precomputed weight function.The algorithm does not contain the derivative of the cone beam data with respect to the position of the source. This guarantees its stability to noise and to numerical errors.The number of elementary operations is optimally bounded with respect to the number of voxels in the object.The said algorithm admits a high instruction level of parallelism for reducing the computing time.

    摘要翻译： 本发明提供了一种基于理论上精确的分析反演公式的重建算法，其可以应用于从具有二维阵列检测器的移动辐射源扫描的物体收集的锥束数据。 所述算法适用于满足完整性条件的任意源轨迹。 除了预先计算的权重函数之外，该算法不依赖于轨迹。 该算法不包含相对于源的位置的锥束数据的导数。 这保证了其对噪声和数字误差的稳定性。 基本操作的数量相对于对象中的体素数量是最佳的。 所述算法承认了高指令级并行度以减少计算时间。