US Patent 8003079 - Nanoparticles containing iodine for x-ray imaging

http://www.freepatentsonline.com/8003079.html

This patent from Bar-Ilan University teaches a way to increase the visibility of x-ray images using polymer nanoparticles with iodine. Claim 1 reads:

1. Nanoparticles having an average particle size of less than 2000 nm, wherein said nanoparticles comprise a polymer having pendant cleavable iodine substituted groups.