Hi!
I encountered a problem while running 3dROIstats. After drawing two ROI regions, I ran the following script:
3dfractionize -input Sub024ROI_Amy+tlrc -template Sub024_EP+tlrc -vote -clip 0.2 \
-prefix Sub024ROI_F_Amy
3dcalc -datum byte -a3 Sub024_BF_First+tlrc -b Sub024ROI_F_Amy+tlrc -prefix Sub024Amy_BF_First -expr "step(abs(a)-6.674)*b"
(I calculated the F statistics from the third subbrik)
3dROIstats -nzvoxels -mask Sub024Amy_BF_First+tlrc Sub024_BF_First+tlrc[0] > Sub024_Amy_BF_First.txt
(I tried to get the intensities from the first subbrik after masking)
I most cases, I got this one:
File Sub-brick Mean_1 NZcount_1 Mean_2 NZcount_2
Sub024_BF_First+tlrc[0] 0 -5.204402 5 6.071803 1
In some cases, no voxels were found.
File Sub-brick
Sub024_BF_First+tlrc[0] 0
But in some cases, I got such weired results. may I request what it means?
File Sub-brick Mean_255 NZcount_255
Sub024_BF_First+tlrc[0] 0 -3.389716 4
Many thanks in advance!