Abstract: The present invention relates to a contrast medium composition (formulation) comprising a highly concentrated contrast agent for use in an imaging method. The contrast medium composition according to the present invention, which comprises iodine working as a contrast agent in a higher concentration than the concentration used before, shows higher contrast enhancement effect in both of arterial phase and portal phase when used for liver CT than a composition comprising the contrast medium in a concentration used before. Accordingly, images having excellent resolution and discrimination can be obtained.

Abstract: The double packing materials according to the present invention which primarily packs the infusion solution with a polypropylene packing material and secondarily vacuum packs and hermetically seals the packed polyethylene packing material with a material including an aluminum foil ensures safety of the content therein from light and has high thermal resistance and excellent preservation properties that resists to the damage and tearing by external force on long-term storage despite that it is not stored in dark place, and thus is very useful as the packing material for storing expensive infusion solution such as the contrast medium which is radiological diagnostic solution.

Abstract: The double packing materials according to the present invention which primarily packs the infusion solution with a polypropylene packing material and secondarily vacuum packs and hermetically seals the packed polyethylene packing material with a material including an aluminum foil ensures safety of the content therein from light and has high thermal resistance and excellent preservation properties that resists to the damage and tearing by external force on long-term storage despite that it is not stored in dark place, and thus is very useful as the packing material for storing expensive infusion solution such as the contrast medium which is radiological diagnostic solution.