Exact image reconstruction for a circle and line trajectory with a gantry tilt
Exact image reconstruction for a circle and line trajectory with a gantry tilt
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DOI：
10.1088/0031-9155/53/23/n02
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发表时间：
2008-12-07
影响因子：
3.5
通讯作者：
Chiang, Beshan S.
中科院分区：
文献类型：
--
作者：
Zamyatin, Alexander A.;Katsevich, Alexander;Chiang, Beshan S.
我们研究了带有倾斜龙门的圆形和直线轨迹的图像重建。我们从线数据中推导出新的重建方程，例如滤波线方程、滤波线范围和线扫描范围。我们分析了探测器的要求，结果表明，通过我们的算法，线扫描不会对圆柱形探测器尺寸提出额外的要求，即不会发生滤波线的轴向截断。我们讨论该算法的全扫描和短扫描版本。我们的算法的评估使用模拟和真实的 256 切片数据。
We investigate image reconstruction with a circle and line trajectory with a tilted gantry. We derive new equations for reconstruction from the line data, such as equations of filtering lines, range of filtering lines and range of the line scan. We analyze the detector requirements and show that the line scan does not impose extra requirements on the cylindrical detector size with our algorithm, that is, the axial truncation of the filtering lines does not occur. We discuss full-scan and short-scan versions of the algorithm. Evaluation of our algorithm uses simulated and real 256-slice data.