Image reconstruction for the circle and line trajectory
Image reconstruction for the circle and line trajectory
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DOI：
10.1088/0031-9155/49/22/003
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发表时间：
2004-11-21
影响因子：
3.5
通讯作者：
Katsevich, A
中科院分区：
文献类型：
--
作者：
Katsevich, A
提出了一种精确的平移不变滤波反投影算法，用于在源轨迹由不完整圆和直线段组成的情况下对锥束数据进行反演。该算法允许锥束数据的轴向截断。线扫描的长度仅由感兴趣区域确定，并且与整个对象的大小无关。该算法非常灵活，也可以用于由多个（完整或不完整）圆和线段组成的更一般的轨迹。数值实验的结果表明，良好的图像质量。
We propose an exact shift-invariant filtered backprojection algorithm for inversion of the cone beam data in the case when the source trajectory consists of an incomplete circle and a line segment. The algorithm allows for axial truncation of the cone beam data. The length of the line scan is determined only by the region of interest and is independent of the size of the entire object. The algorithm is quite flexible and can also be used for more general trajectories consisting of several (complete or incomplete) circles and line segments. Results of numerical experiments demonstrate good image quality.