This app will compute a population receptive field (i.e. pRF) analysis on a given time series. Inputs needed include: a time series nifti, a stimulus nifti, the measurements of the visual stimulus in space (stimimageunits), and dimensions of a mask (mask; optional). Outputs include: x.nii, y.nii, rfWidth.nii and r2.nii. Please see http://gru.stanford.edu/doku.php/mrTools/tutorialsprf for more detail.