ALFF/fALFFΒΆ

_images/alff_falff.png
  • mask: could be whole brain mask or gray matter mask.
  • id index: identifier to find unique string for each subject
  • filetype: files in the filetype will be searched in input directories.
  • 4D nifti files: if the input data is 4D, check this item. Otherwise uncheck.
  • input dirs: directories can be input either using a .txt file or spm select window.
  • TR: repetition time, used as sample frequency 1/TR to estimate width of frequency band.
  • lower cutoff (Hz): lower cutoff for band pass filter.
  • upper cutoff (Hz): upper cutoff for band pass filter.
  • normalize transform: in output file, a suffix of _m means the output is divided by mean intensity in the mask; a suffix of _z means the output is subtracted by mean intensity and divided by standard deviation.
  • out dir: output directory for saving results.
  • Buttons:
    • S: Save parameters of the current panel to a *.mat file. The *.mat can be further loaded for the panel or be used in a script processing.
    • L: Load parameters from *.mat for the current panel.
    • ?: Help information.