| 摘要 |
A radiographic indicator based on technetium-99m is prepared by dissolving ascorbic acid or a pharmacologically acceptable salt or ester thereof together with a reducing agent for pertechnetate in a pertechnetate solution. The composition suitable for this purpose contains (I) a reducing agent for pertechnetate or a pertechnetate solution and (II) an amount, which suffices to stabilise the composition in the presence of oxygen and radiolysis products, of ascorbic acid in the form of the free acid or of a pharmacolgically acceptable salt or ester of the acid. |
