-20-
HExample:
3dROIstats -mask ROI_fred+tlrc Ôfunc_fred+tlrcÕ
Output shown in the shell (use > command to save into to a text file):
File Sub-brick Mean_1 Mean_2 Mean_3
func_fred+tlrc 0 30.17
35.32 22.49
func_fred+tlrc 1 0.155
0.159 0.09
func_fred+tlrc 2 49.07
64.33 37.18
åThe Mean_1 column is the average
over the ROI whose mask value is Ò1Ó.
The average is calculated for voxels
from our functional dataset func_fred+tlrc, that fall
within the ROI. Averages are
computed at each sub-brick (#0, #1, #2,
etc)
íMeans have also been
computed for ROIs whose mask value is Ò2Ó (Mean_2) and Ò3Ó (Mean_3)
HVery useful if you creat ROI
masks for a number of subjects, using the same number codes for the same
anatomical regions (e.g., 1=hippocampus, 2=amygdala, 3=superior temporal gyrus,
etc.)
HYou can load the output of 3dROIstats into a spreadsheet for
further analysis (e.g., statistics with other subjectsÕ data)
