# Denoising and unringing before eddy

**URL:** <https://community.mrtrix.org/t/denoising-and-unringing-before-eddy/2223>\
**Category:** Uncategorized\
**Created:** [January 31, 2019, 4:53pm UTC](https://community.mrtrix.org/t/denoising-and-unringing-before-eddy/2223 "2019-01-31T16:53:44Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![jdtournier](https://community.mrtrix.org/user_avatar/community.mrtrix.org/jdtournier/32/2594_2.png) [@jdtournier](https://community.mrtrix.org/u/jdtournier)\
**Post date:** [February 4, 2019, 4:28pm UTC](https://community.mrtrix.org/t/denoising-and-unringing-before-eddy/2223/7 "2019-02-04T16:28:28Z")

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> [@zeydabadi](#):
>
> Should I do denoising and Gibbs ringing correction for each PE separately or I can concatenate them and then do denoising and Gibbs ringing correction?

This is a tricky issue, and [discussed in this thread](https://community.mrtrix.org/t/preprocessing-questions/995) – personally I’d concatenate and see what happens, but inspect the results very closely, particularly the residuals of `dwidenoise`.

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_[View the full topic](https://community.mrtrix.org/t/denoising-and-unringing-before-eddy/2223)._