Antistatic x-ray intensifying screen comprising sulfonyl methide and sulfonyl imide and amide salts

An X-ray intensifying screen comprising a support, a fluorescent layer coated thereon which comprises fluorescent phosphor particles dispersed in a binder, and a protective top-coat layer covering said fluorescent layer, wherein at least one of said fluorescent and top-coat layers comprises at least one salt selected from the group consisting of fluoroalkylsulfonyl methides, fluoroalkylsulfonyl imides, and fluoroalkylsulfonyl amides, wherein said salts are represented by the following formula:

• ##STR4## wherein Me is an organic or inorganic cation, Rf is a highly fluorinated alkyl group having 1 to 12 carbon atoms, X is nitrogen or carbon atom, Y is --C(O)--, --SO.sub.2 -- or a single bond, R is an alkyl or aryl group, v is the valence of X, and m is 0 or 1, when X is nitrogen atom, and m is 0 or 1 or 2 when X is carbon atom, and wherein two Rf groups can join together to form a fluorinated cyclic alkyl ring.