This isn't a simple MRI scan that anyone can have done I'm afraid. The reality is a bit more morbid. The images you see are called a "color cryosection" for project "Visible Human" in which a donated body was frozen in gelatin, sliced and scanned.
"In August of 1991 NLM awarded a contract to the University of Colorado Health Sciences Center to create the digital cross-sections of a 39-year old convicted murderer who had donated his body to science. The radiological data was created using commercial MRI and XRAY-CT. Two CT data sets were created: one of the fresh cadaver, the other after the cadaver was frozen. Then, the cadaver was embedded in gelatin, frozen and sliced from head to toe. As each layer was exposed, a color RGB photograph was taken. Over 1800 24-bit images 2048 by 1216 were created."
Full articles here: http://www.crd.ge.com/esl/cgsp/projects/vm/
"In August of 1991 NLM awarded a contract to the University of Colorado Health Sciences Center to create the digital cross-sections of a 39-year old convicted murderer who had donated his body to science. The radiological data was created using commercial MRI and XRAY-CT. Two CT data sets were created: one of the fresh cadaver, the other after the cadaver was frozen. Then, the cadaver was embedded in gelatin, frozen and sliced from head to toe. As each layer was exposed, a color RGB photograph was taken. Over 1800 24-bit images 2048 by 1216 were created."
Full articles here:
http://www.crd.ge.com/esl/cgsp/projects/vm/
http://en.wikipedia.org/wiki/Visible_Human_Project
http://www.nlm.nih.gov/research/visible/visible_human.html