Quality Control is an essential phase of the pharmaceutical production process, and aims to verify the compliance of the drug produced with specific reference requirements. This includes verifying the specifications of the raw materials used in the production, identifying the correct conditions for conserving the radiopharmaceutical and defining its release specifications. This ensures that, until their quality has been judged satisfactory, the raw materials are not used and the drug is not released for sale. Quality control is therefore not exclusively a laboratory activity: it is also an inspection activity that takes place step-by-step and evaluates every aspect of the quality of the finished drug.