| 摘要 |
The invention provides a process for the preparation of a fluorocarbon-containing lyophilised contrast agent which comprises lyophilising lyophilisable precursor material contained in one or more containers in a lyophilisation or like vacuum chamber, introducing said fluorinated gas into said chamber and effecting sealing closure of said container or containers, characterised in that, following closure of said container or containers, an overpressure of an atmoshperic gas is applied to said chamber and said fluorocarbon gas is allowed to condense in a condensation vessel connected to said chamber. |
