| 摘要 |
A dry powder composition is described. In one embodiment, the composition comprises smaller label particles attached to larger particles. In another embodiment, the composition comprises label particles comprising a core of a gamma emitting radionuclide and a shell of a non-radioactive material that are attached to a second particulate material. A method for preparing the compositions as well as their use in the evaluation of drug distribution following inhalation of the compositions into the respiratory tract is also described. |
