To avoid the effect of cumulate error in conventional iterative reconstruction algorithms, a linear rewound method is put forward.

为了避免迭代式重建策略所存在的累积误差效应，提出了一种线性回溯射影结构恢复策略。

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All the major types of reconstruction approaches are discussed, including exact algorithms, approximate algorithms, and iterative algorithms.

文中涉及各种主要重建算，法包括准确重建，近似重建和迭代重建算法。

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As the calculation speed of the CPU is fast developed, more consideration is paid to the iterative algorithms in tomographic reconstruction, which were only experimented as a research method before.

随着计算机运算速度的飞速发展，以前只是被看成一种研究方法的迭代算法在图像重建中越来越引起人们的重视，并且已经在科研、工业和医学领域中得到了实际应用。

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