Enhancing Calibration Standards for Diagnostic and Therapeutic Applications Nuclear medicine is a versatile and widely used diagnostic and therapeutic medical technique utilising radioactivity to diagnose and treat diseases in areas such as oncology, neurology and cardiology. The measurement of radioactivity in the clinical environment prior to injection, or as part of an imaging study, relies on the use of calibrated instruments. Despite being a heavily regulated environment, calibration and traceability routes across Europe vary in both availability and design leading to a disparity in measurement capability. This project aims to establish traceability routes for nuclear medicine services and provide guidance and tools to enable its widespread adoption beyond the EU.