压缩感知层析重建中的环形伪影校正
Ring artifacts correction in compressed sensing tomographic reconstruction
摘要：
本文提出了一种新的压缩感知层析重建中环状伪影的校正方法。校正是重建过程的一部分，这与经典的正弦图预处理和图像后处理技术不同。介绍了压缩感知层析重建的基本原理。然后，我们表明，环伪影校正可以集成在重建问题的形式主义。我们提供模拟和真实数据的数值结果。该技术包括在PyHST 2代码中，该代码在欧洲同步辐射设施中用于断层重建。
英文摘要：
We present a novel approach to handle ring artifacts correction in compressed sensing tomographic reconstruction. The correction is part of the reconstruction process, which differs from classical sinogram pre-processing and image post-processing techniques. The principle of compressed sensing tomographic reconstruction is presented. Then, we show that the ring artifacts correction can be integrated in the reconstruction problem formalism. We provide numerical results for both simulated and real data. This technique is included in the PyHST2 code which is used at the European Synchrotron Radiation Facility for tomographic reconstruction.
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