Bandpass in anfi_proc.py

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1

Hi, every AFNI expert

In generally, resting-state BOLD signal range in 0.01-0.1. But when I see afni_proc.py newest example 11b for resting state, I notice there is no bandpass anymore. Why is that? Can I band pass later when I finish example 11b?

In case of reminding others who are also interesting in this question, I copy the example 11b from afni_proc.py

            afni_proc.py -subj_id FT.11b.rest                            \
              -blocks despike tshift align tlrc volreg blur mask regress \
              -copy_anat FT_anat+orig                                    \
              -dsets FT_epi_r?+orig.HEAD                                 \
              -tcat_remove_first_trs 2                                   \
              -align_opts_aea -cost lpc+ZZ                               \
              -tlrc_base TT_N27+tlrc                                     \
              -tlrc_NL_warp                                              \
              -volreg_align_to MIN_OUTLIER                               \
              -volreg_align_e2a                                          \
              -volreg_tlrc_warp                                          \
              -volreg_warp_dxyz 2.5                                      \
              -mask_segment_anat yes                                     \
              -mask_segment_erode yes                                    \
              -mask_import Tvent template_ventricle_2.5mm+tlrc           \
              -mask_intersect Svent CSFe Tvent                           \
              -regress_motion_per_run                                    \
              -regress_ROI_PC Svent 3                                    \
              -regress_ROI_PC_per_run Svent                              \
              -regress_make_corr_vols WMe Svent                          \
              -regress_anaticor_fast                                     \
              -regress_censor_motion 0.2                                 \
              -regress_censor_outliers 0.1                               \
              -regress_apply_mot_types demean deriv                      \
              -regress_est_blur_epits                                    \
              -regress_est_blur_errts                                    \
              -regress_run_clustsim yes
2

Hello,

You can band pass in afni_proc.py, as is shown in many
other examples. Band passing after the fact is not a
good idea (if it is at all).

As for why there is a resting state example without
doing it, consider:

In the “RESTING STATE NOTE” section of the output from
afni_proc.py -help, see “Comment on bandpassing”, and in
particular, the subsequent “degrees of freedom” section.

Or see my general rant on band passing.

  • rick