Follow ECR 2021 – Online – More than 60 Refresher Courses and Master Classes organised by the ECR Scientific Subcommittees will be made available, focusing on refreshing knowledge and providing you with updates on the newest developments in your subspecialty. These sessions cover everything from imaging techniques and differential diagnosis, to treatment follow-up. Some of the chosen topics include liver lesions, musculoskeletal ultrasound, radiography, physics in medical imaging, imaging informatics, paediatric radiology, and oncologic and vascular imaging.