Others in the literature have looked into how slow-4 (0.027-0.073 Hz) and slow-5 (0.01-0.027 Hz) oscillations in rs-fMRI data change between populations. Would you then recommend that unless we are looking at specific frequency bins within resting-state, we should not bandpass filter the rs-fMRI data that has gone through ICA-FIX?
________________________________ From: Steve Smith <st...@fmrib.ox.ac.uk> Sent: Wednesday, February 6, 2019 12:34:55 PM To: Anita Sinha Cc: hcp-users@humanconnectome.org Subject: Re: [HCP-Users] Bandpass filtering ICA-FIX resting data Hi On 6 Feb 2019, at 18:08, Anita Sinha <amsi...@wisc.edu<mailto:amsi...@wisc.edu>> wrote: To Whom It May Concern, I am interested in using ICA-FIX resting-fMRI data from HCP. Given that ICA-FIX functions to denoise the data by removing high frequency noise, It's not explicitly doing this. The pre-filtering removes just the *very* lowest frequencies. But yes in practice FIX will remove a lot of high frequency components if they are deemed artefact. do you recommend bandpass filtering the rs-fMRI data (0.01- 0.1 Hz) that has already gone through ICA-FIX before running any analysis? No - I would almost never recommend doing lowpass filtering (removing high frequency signal). Cheers. Thank you for your time. I look forward to hearing from you soon. Regards, Anita _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org<mailto:HCP-Users@humanconnectome.org> http://lists.humanconnectome.org/mailman/listinfo/hcp-users --------------------------------------------------------------------------- Stephen M. Smith, Professor of Biomedical Engineering Head of Analysis, WIN (FMRIB) Oxford FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK +44 (0) 1865 610470 st...@fmrib.ox.ac.uk<mailto:st...@fmrib.ox.ac.uk> http://www.fmrib.ox.ac.uk/~steve --------------------------------------------------------------------------- Stop the cultural destruction of Tibet<http://smithinks.net> _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
