The invention relates to a contrast medium for ex vivo microangiography for digital imaging of the vascular system of a mouse or rat or other laboratory animals, and of individual animal and human organs, comprising an iodized, esterified oil, a polyurethane, and a hardener. The invention further relates to a method for producing the contrast medium； to a kit of parts, comprising the various containers having the components of the contrast medium according to the invention that are to be mixed； and to a preferred use of the contrast medium according to the invention for imaging by means of a micro-CT device.
