We have established a Quality Management System in accordance with the requirements of the MSZ EN ISO 9001:2015 standard, which system we continuously operate, evaluate and improve, and we prove its relevance by continuously maintaining international certification. The international EARL accreditation program deals with the harmonization of image quality of PET-CT devices, which is essential for the implementation of modern, multi-centric clinical examinations (https://earl.eanm.org/). This standard enables a two-level classification: an accreditation defining a lower (EARL Standard 1) and a higher image quality (EARL Standard 2). The PET-CT devices operating in our centers are accredited according to the international EARL Standard 2.