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High‐resolution synchrotron radiation X‐ray phase contrast microtomography (PC‐μCT) images often suffer from severe ring artifacts, which are mainly caused by undesirable responses of detector elements. In the medical imaging field, the existence of ring artifacts can lead to degraded visual quality and can directly affect diagnosis accuracy. Thus, removing or at least effectively reducing ring artifacts is indispensable.

The existing ring artifacts removal algorithms mainly focus on two‐dimensional (matrix‐based) priors, and these algorithms fail to consider correlations hidden in sequential computed tomography (CT) images. This paper proposed a novel three‐dimensional (tensor‐based) ring artifacts removal algorithm for synchrotron radiation X‐ray PC‐μCT images. In the sinogram domain, ring artifacts manifest as vertical stripe artifacts. From an image decomposition perspective, a degraded …