Hi all,

I have a functional localizer data to define middle temporal area. I did 3dDeconvolve and set threshold at a p=.001 on AFNI GUI. Then I did 'clusterize' on GUI with default NN level and number of voxels.

As shown in an attached image, I can see the four big clusters, and two of them are the bilateral MT areas which I'm looking for, but results from 'clusterize' provide me one huge cluster including those (apparently) four chunks.

What I want to create is the two masks each only for the left and right MT.

I tried to adjust the level of threshold in order to separate the left, right MT from the huge cluster, then there are issues like 1)some people have only hemisphere MT survived (i.e. left MT only) even if I can see bilateral MT at a p=.001 threshold, 2) the survived cluster's voxel number gets smaller, and 3) the adjusted threshold levels are different between each hemisphere's MT or among participants.

I would appreciate it if you could give me any advice on how to make a mask for each MT area in this situation.

Four your information, I didn't normalize epi data to MNI or other normalized space in accordance with a custom in visual neuroscience field.

Thank you always!!