关于预处理中的distortion correction

各位老师好！

最近碰到了一个审稿问题如下：

The authors failed to do distortion correction in preprocessing. The inhomogeneous B0 field induced distortion usually happens at prefrontal lobe and cerebellar, where the current study mainly focus on. The absent of distortion correction may undermine the reliability of the results.

我想问下distortion correction应该如何做呢？什么软件可以做？

谢谢