introduction: in order to develop a radiolabeled calcitonin (ct) derivative for receptor imaging studies, ct was successively labeled with 67ga-gallium chloride. methods: the best results of the conjugation were obtained by the addition of 0.5 ml of a ct nasal pharmaceutical solution (1100 iu) to a glass tube pre-coated with dtpa-dianhydride (0.01 mg) at 25°c with continuous mild stirring for 3...