Zamyatin Alexander A, Katsevich Alexander, Chiang Beshan S
Toshiba Medical Research Institute USA, Vernon Hills, IL 60061, USA.
Phys Med Biol. 2008 Dec 7;53(23):N423-35. doi: 10.1088/0031-9155/53/23/N02. Epub 2008 Nov 7.
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.
我们研究了带有倾斜机架的圆形和直线轨迹的图像重建。我们推导了从直线数据进行重建的新方程，例如滤波线方程、滤波线范围和线扫描范围。我们分析了探测器要求，并表明使用我们的算法时，线扫描对圆柱形探测器尺寸没有额外要求，即不会出现滤波线的轴向截断。我们讨论了该算法的全扫描和短扫描版本。我们的算法评估使用了模拟的和真实的256层数据。
