▎ 摘 要
NOVELTY - A magnetic resonance imaging contrast agent comprises 13C graphene quantum dots and 13C graphene oxide quantum dots. USE - Magnetic resonance imaging contrast agent is useful for obtaining images of blood vessel, lymph node, angiogenesis in cancer cell or atherosclerotic plaque (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of magnetic resonance imaging contrast agent.