Magnetic resonance imaging is a very useful technology. First, it provides a solid medical evidence that you have a brain. Also, it gives a way to imagine how your head will look like when you become bald (MRI data courtesy of Michael Lustig).
On April 18, 2008 I visited the Stanford Magnetic Resonance Systems Research Laboratory. They have a GE 1.5 Tesla Signa MRI scanner, in which I was offered to scan myself. The scan took approximately 5 minutes and the outcome was a set of 206 slices, each in 256x256 resolution. In the image above, it is visualized in MATLAB using isosurfaces. The quality is amazing, even though the images are slightly blurry because I did not follow the instruction not to move.