A Northwestern University study shows that coupling a magnetic resonance imaging contrast agent to a nanodiamond results in dramatically enhanced signal intensity and thus vivid image contrast. The researchers say it is a game-changing event for sensitivity and the first published report of nanodiamonds being imaged by MRI technology. The gadolinium(III)-nanodiamond complex demonstrated a greater than 10-fold increase in relaxivity — among the highest per Gd(III) values reported to date.