Does anyone use AFNI to analyze periodic retinotopy data? Is there an easy way to create phase and correlation maps with AFNI?

We are interested in using AFNI and SUMA to analyze and display our retinotopy data. Currently I am using Matlab to analyze the data, and we are wondering whether we should just import that Matlab results into AFNI, or whether it would be just easier to analyze the data with AFNI to begin with.

To be more explicit, the stimulus is, for example, a rotating hemifield. Currently I use a fourier analysis to extract the phase, correlation and amplitude from the timecourse of each voxel. I want to display the phase data only for those voxels that are significantly activated (and this is the part that is not so clear to me, since I am not sure whether I can use the correlation map as a threshold map in AFNI, and then display the phase only for the significantly correlated voxels).

Has someone written a plugin or something to do this?

Thanks for any information,

keith