Dear Dr. Mclaren,

Thank you so much for sharing the toolbox. I was wondering whether you might be able to help with with a couple of questions below:

Q1: To run the version using VOI.mat file, the tutorial shows only one VOI in the P.VOI field presumably because there is only one single session. In my dataset, I have 5 sessions. Since I have to extract VOI data for each session separately, could you please let me know where I enter the 5 VOI .mat files?

Q2: Previously, I used spherical VOI so I ran the gPPI (create sphere) version. This required only giving gPPI the coordinates and diameter, which was very convenient. Now I would like to try individually defined clusters. Is there anyway I can feed the mask to gPPI instead of extracting the VOI data elsewhere then provide gPPI with the .mat files?

Thank you for your time!

Best,

Alex

Q1: To run the version using VOI.mat file, the tutorial shows only one VOI
in the P.VOI field presumably because there is only one single session. In
my dataset, I have 5 sessions. Since I have to extract VOI data for each
session separately, could you please let me know where I enter the 5 VOI
.mat files?

R1: I would avoid using 5 separate VOI files. The program only uses the VOI
files to identify voxels for data extraction. I don't think it would be
wise to extract from different voxels in different sessions. Thus, a single
VOI should be sufficient.

Q2: Previously, I used spherical VOI so I ran the gPPI (create sphere)
version. This required only giving gPPI the coordinates and diameter, which
was very convenient. Now I would like to try individually defined clusters.
Is there anyway I can feed the mask to gPPI instead of extracting the VOI
data elsewhere then provide gPPI with the .mat files?

R2: You can feed in nifti images. The image should be all 0s except for the
voxels you want to extract data.

Hope this helps.

-Donald