Internet Access: ftp://nlmpubs.nlm.nih.gov/

Eleven full-color anatomical images
   ftp://nlmpubs.nlm.nih.gov/visible/bitmaps/color24 
   as [*.raw]  each image  over 7 megabytes in size. 

Ten CT scan images
   ftp://nlmpubs.nlm.nih.gov/visible/bitmaps/ct 
   as [*.fre] (5 images captured while fresh) 
      [*.fro] (5 images captured after frozen). 
Six MRI scan images  as [*.t1]
   ftp://nlmpubs.nlm.nih.gov/visible/bitmaps/mri

Scaled down versions of all of these image files
   ftp://nlmpubs.nlm.nih.gov/visible/gifs as [*.gif]