Preparation Process of ⁶⁸Ge Calibration Source

⁶⁸Ge calibration source used for positron emission tomography (PET) attenuation correction was prepared by soluble gels method， mixed radioactive ⁶⁸Ge solutions and the commercial epoxy, eliminating water by heating, then encapsulated and sealed in stainless steel tube. Quality examination of ⁶⁸Ge calibration source was performed. The results show that the ⁶⁸Ge calibration source is sealed well, the surface is pollution-free, and the active distribute of the ⁶⁸Ge calibration source is evenly with an activity uniformity not more than ±5%. The various technical indexes of the source have achieved the level of similar products abroad.