09 May 2003
Vol 300, Issue 5621

About The Cover

Cover image expansion

COVER A 3D high-resolution magnetic resonance angiogram of a human foot, showing blood vessels containing MS-325, an investigational MRI contrast agent. As outlined in the special section in this issue, metals, such as the gadolinium in MS-325, have important roles--both positive and negative--in normal cellular biochemistry, the environment, and medicine. 925 [Image: EPIX Medical, Schering AG, and Berlex Laboratories Inc.]