I have collected a EPI BOLD sequence data using Siemens skyra 3T. The voxel size is 3x3x3 mm^3. TR = 2s. I am seeing Gibbs artifact similar to the image:

enter image description here

People have suggested to smooth the data to get rid of it. But I will be doing MVPA (multi Variate Pattern Analysis). Since MVPA relies on spatial pattern, smoothing it is a bad idea. So can you please let me know if my results will be influenced by Gibbs artifact? Also, from whatever I read, Fourier reconstruction at lower spatial resolution could lead to this artifact. Can any MRI scanner hardware issue cause this artifact, like heating up of RF coil, etc.

  • 1
    $\begingroup$ Hi Aakash, welcome at CogSci. I made some minor edits to make your question more legible. Could you perhaps provide some extra clarification to your question. For example, why is smoothing the data troublesome for MVPA? $\endgroup$ Commented Apr 24, 2017 at 6:48
  • $\begingroup$ Hi Aakash, do you have a second account? I saw @AakashAgrawal make a suggested edit. If so, please stick to one account. It makes it easier for you to gain reputation and to organize other SE.networks $\endgroup$ Commented Apr 26, 2017 at 6:41
  • $\begingroup$ I'm unfamiliar with this field, but the link you give for smoothing says in the abstract "Moderate smoothing (up to 2.2 mm) improved the accuracies..." $\endgroup$
    – mflo-ByeSE
    Commented May 13, 2017 at 17:14


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