Image reconstruction for the circle-and-arc trajectory
Image reconstruction for the circle-and-arc trajectory
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DOI：
10.1088/0031-9155/50/10/005
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发表时间：
2005-05-21
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圆弧轨迹算法。该算法有几个重要的特点。首先，它允许圆是不完整的。第二，允许锥束数据的轴向截断。第三，弧的长度仅由感兴趣区域决定，与整个物体的大小无关。该算法是相当灵活的，可以用于更一般的轨迹，包括几个圆弧段和弧。该算法也适用于圆（或多个圆）完整的情况。使用时钟体模的数值实验证明了良好的图像质量。
Proposed is an exact shift-invariant filtered backprojection algorithm for the circle-and-arc trajectory. The algorithm has several important features. First, it allows for the circle to be incomplete. Second, axial truncation of the cone beam data is allowed. Third, the length of the arc 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 be used for even more general trajectories that consist of several circular segments and arcs. The algorithm applies also in the case when the circle (or, circles) is complete. A numerical experiment with the clock phantom demonstrated good image quality.