Every now and then, I get an e-mail from someone asking if they can use my MRI data for their paper or project. In case you've never seen "My Brain" page, it has a link to download a 3D stack of slices of my head. One of the 129 slices is shown on the right.
A couple years ago, I was approached by the creators of ImageJ, a free image-processing application offered by the National Institute of Health in the U.S. They asked if I would agree to allow them to use my MRI data as a standard sample dataset. OF COURSE! So now anyone that has ImageJ can get my MRI slices by simply choosing "Open samples..." from the File menu. They can also see a volume rendering from that MRI stack. ... the scanner adds at least 10 pounds.