Using a patient identification system allows healthcare professionals to treat patients safely and efficiently. Dr. Markus Dahlke presents the advantages such a system brings to everyday clinical practice and what needs to be taken into account. What are the reasons for procuring such a new system? And what should be considered?At the end, there will be a preview of the first version of the Accessory Check System, which is intended to further increase patient safety during irradiation. This system also checks the use of correct immobilization devices.