This paper proposed a modified ordered subsets expectation maximization(OSEM) reconstruction based on the direct helical half-scan data.
提出了基于直接螺旋半扫描数据的有序子集期望最大化（OSEM）迭代重建。
The validity of half-scan mode was verified by the results of computer simulation and experiments.
计算机模拟和实验结果证明了该技术的正确性。
The validity of half-scan mode was verified by the results of computer simulation and experiments.
计算机模拟和实验结果证明了该技术的正确性。
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