To solve the problem of differentiating veins from lymphatics in MRI images, among other uses, the disclosed embodiments relate to compositions, kits, systems, and methods that include an MRI contrast agent and an MRI suppression agent that is also a blood pool agent. Using appropriate MRI techniques, the MRI suppression agent will suppress signal in its location, while signal enhanced by the MRI contrast agent in other locations will not be suppressed. The result is a clarified MRI image with only non-vascular regions enhanced.
