水溶性造影剂可分为两类:离子型和非离子型。它们的基本结构类型见表。早期研制的水溶性造影剂大多属离子型,其中碘化钠为无机碘,属于A型结构。过去用于逆行尿路造影,后来为有机碘取代。其后陆续发展了多种离子型有机碘造影剂。属于B型的有碘沃酮(碘吡啦啥,Iodopyracet,Diodone);属于C型的有泛影酸盐(Diatrizoate,泛影钠Hypaque,泛影葡胺Urografin/Renografin),甲泛影酸盐(Metrizoate,Iso- Water-soluble contrast agents can be divided into two categories: ionic and non-ionic. Their basic structure types are shown in the table. Early development of water-soluble contrast agents are mostly ionic, of which sodium iodide is inorganic iodine, belongs to the A-type structure. Used to retrograde urography, later replaced by organic iodine. Subsequently developed one after another a variety of ionic organic iodine contrast agent. Iodopyracet, Diodone, which belongs to type B, Diatrizoate, Urografin / Renografin which belongs to type C, (Metrizoate, Iso-