Main question: Does fmriprep handle gibbs ringing artifacts?
Issue at hand and background:
- We’ve noticed gibbs ringing within our mriqc outputs [ Figure 1 below ]
- The rings are still present in T1 images, after fmriprep preprocessing [ Figure 2 & 3 below ]
- Several communities have suggested that smoothing will resolve the gibbs artifact; however, we plan to NOT smooth the data for the purpose of running MVPA and hyperalignment.
- For DWI data, there are many resources regarding de-gibbs algorithms; we’re also aware that qsiprep has a degibbs option.
Back to question:
Does fmriprep handle gibbs artifacts? Or if we need to take additional steps, could you please recommend any “post” preprocessing algorithms, such as MRtrix3’s degibbs algorithm?
Thank you in advance!
[ Figure 1: mriqc output, rings visible from the ICA components ]
[ Figure 2: T1w BEFORE fmriprep, rings visible ]
[ Figure 3: T1w AFTER fmriprep, rings visible ]