The DOM, Lemer Pax dose dispensing system is designed to prepare, fractionate and dose radioactive solutions in aseptic conditions. These solutions can include radiopharmaceutical preparations with marketing authorisation or experimental radiopharmaceutical drugs for biomedical research. DOM: very flexible system It allows to carry out several operations simply and quickly according to the operator needs: add one or several diluents and/or preservatives to a stock solution, fractionate into several vials, rinse the dispensing system. The DOM must be used in a class A shielded hot cell to meet the necessary aseptic conditions required for injectable preparations as well as regulatory requirements such as GMP, GPP, or EuGMP. The filling is performed in open vials, which are afterwards crimped on the dedicated module of the DOM.