A novel contrast agent for multispectral magnetic resonance imaging

Arrays of double-disk structured particles were fabricated with ferromagnetic iron disks separated by nonmagnetic polyimide spacers, to be used as multispectral contrast agents for magnetic resonance imaging (MRI). The advantages of using this contrast agent, compared to currently existing agents, include geometrically dependent spectral signatures, diffusion driven signal amplification, and potentials for functionalized, environmentally responsive particles. Compared to previous works, biocompatibility was largely considered for future applications within a biological environment.