How to obtain the number of Voxels or Volume for each Cluster?

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Nicolas Lori

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Jul 17, 2018, 12:39:50 PM7/17/18

to Aaron's fMRI matlab tools.

Dear Aaron,

I wonder how to obtain the number of Voxels or Volume for a Cluster?

Managed to obtain the score for each Cluster, and for each of the Clusters I can also do: "Plot Cluster", "Plot Cached Cluster", or "Cache Cluster Index".

But what I do not know how to do, is to obtain the number of Voxels and/or the Total Volume for each of the Clusters.

Thank you for your attention.

Best regards,

Nicolas

Aaron Schultz

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Aug 20, 2018, 9:43:52 AM8/20/18

to Aaron's fMRI matlab tools.

The VOI data structure will have information regarding the number of voxels in the cluster. The number of elements in VOI.index is the number voxels in the cluster (also the second dim of VOI.allData). That number can then be multiplied by the volume of a single voxel to get the volume.