afni.nimh.nih.gov

Dear AFNI lords - a simple question, but I cannot see how to do it in the documentation. I need to compute the crosscorrelations between voxel time series in a 3d+time volume, but only in a defined neighborhood of each voxel. 3dTCorrmap does this, but does so between each voxel and the entire volume (or the volume defined by a mask). What I need instead is the 3dTCorrmap restricted to a sphere (or other small volume) around each individual voxel. Many thanks. Giri