Establishment of a fast and high yield method for routine production of [(131) I]MIBG and investigation of its radiochemical stability for diagnosis and treatment uses.

In this work, exchange radioiodination of metaiodobenzylguanidine (MIBG) was carried out at optimum conditions that facilitates the production of [(131) I]MIBG both quickly and efficiently. The radiochemical purity and yield of the labeled product are typically as high as 99% and 90% for diagnostic dose and 95% and 80% for therapeutic dose, respectively. Stability studies show that labeled material at the room temperature met the demand of the clinical application. This labeling procedure will be used in the routine production process of [(131) I]MIBG for diagnosis and treatment uses.

Influence of drying conditions of zirconium molybdate gel on performance of (99m)Tc gel generator.

(99m)Tc can be produced from (99)Mo/(99m)Tc gel generators. These gels are part of the generator and the (99)Mo/(99m)Tc gel generator performance is directly related with gel structure. In this work a series of zirconium molybdate gels have been synthesized and dried under different conditions and characterized using thermal analysis (TGA, DTA), SEM, XRD and porosity measurements. It is found that the water content of the gel determines the structure porosity which allows the diffusion of the (99m)TcO(4)(-) ions inside the gel and was directly connected with performance of the (99)Mo/(99m)Tc gel generators. Drying conditions of the gel is as an important factor that influence water content and physical-chemical properties of this gel and must be carefully studied to optimize the properties of the gel generators.