> Would it be possible to calculate the t-value for a given q-value, even though there is no
> voxel in the dataset that passes this threshold and return that value instead? Or would it
> be possible to return a t-value that is very high instead?
Jonathan, the threshold for the t-stat values associated a specific FDR q-value is determined by the distribution of all the t-values in the brain. That is why you're seeing the phenomenon, and there is no way to say anything where you don't have any data.
Gang