I have information related to the PSF for different scanners, but not the PSF itself. These are available somewhere at LONI, though I am not sure. Some of the phantom scans are available from LONI, and I have all those that are not available.
Please give me some more details on the PSF question, and send it directly to me e-mail (koeppe@umich.edu). I will give a more detailed response there. Thank you