申请人:Konica Minolta Medical & Graphic, Inc.
公开号:EP1679084A1
公开(公告)日:2006-07-12
A radiographic contrast medium is disclosed, comprising liposomes having a narrow vesicle size distribution and comprising a lipid membrane containing a polyalkylene oxide group-containing compound and/or sterols, and the liposomes enclosing a water-soluble nonionic iodine compound. The liposomes which enclose a water phase inside the lipid membrane are dispersed in an aqueous medium, and preferably, both of the water phase and the aqueous medium contain the iodine compound and an additive and each of an iodine compound concentration and an additive concentration is substantially the same in both of the water phase and the aqueous medium, in which the weight ratio of the iodine compound to the lipid membrane is 1 to 10. The contrast medium is prepared by the supercritical carbon dioxide method and therefore, is substantially free of a toxic solvent such as a chlorine-containing solvent.
本发明公开了一种射线造影剂,它由具有窄囊泡尺寸分布的脂质体组成,脂质体由含有聚环氧烷基化合物和/或甾醇的脂膜组成,脂质体中含有水溶性非离子碘化合物。脂膜内含有水相的脂质体分散在水介质中,最好水相和水介质都含有碘化合物和添加剂,且水相和水介质中碘化合物浓度和添加剂浓度基本相同,其中碘化合物与脂膜的重量比为 1 比 10。对比介质是用超临界二氧化碳法制备的,因此基本上不含有毒溶剂,如含氯溶剂。