Method of preparing radionuclide doses

Dosages of a radionuclide carrier for use in diagnostic nuclear medicine are prepared in separate, aliquot quantities by storing a discrete amount of a lyophilized radionuclide carrier material in tubular containers. The containers are closed to exclude moisture and air. The radionuclide carrier is reconstituted as an aliquot dosage by interposing the container between the needle and barrel of a hypodermic syringe, and drawing a predetermined amount of a reconstituting liquid into the syringe barrel through the needle and through the container. The liquid dissolves the lyophilized carrier to form an aliquot dosage for each patient, only as needed.