We propose an efficient implementation of an interior tomography reconstruction method based on a known subregion. This method iteratively refines a reconstruction, aiming at reducing the local tomography artifacts. To cope with the ever increasing data volumes, this method is highly optimized on two aspects: firstly, the problem is reformulated to reduce the number of variables, and secondly, the operators involved in the optimization algorithms are efficiently implemented. Results show that $$4096^2$$ slices can be processed in tens of seconds, while being beyond the reach of equivalent exact local tomography method.

中文翻译：

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高效地实施局部断层扫描重建算法。

我们提出了一种基于已知子区域的内部层析成像重建方法的有效实现。该方法迭代地完善了重建过程，旨在减少局部断层摄影伪像。为了应对不断增长的数据量，该方法在两个方面进行了高度优化：首先，对问题进行了重新设计以减少变量的数量；其次，有效地实现了涉及优化算法的运算符。结果表明，$ 4096 ^ 2 $$切片可以在数十秒内处理，而这超出了等效的精确局部层析成像方法的范围。