sentences:  The core of the European Society of Radiology’s (ESR) activities is the organisation of its annual meeting, the European Congress of Radiology (ECR).With more than 30,000 participants from around 100 countries and more than 4,000 scientific papers and exhibits, the ECR has developed into the largest radiological meeting in Europe since it was first held in its ‘new’ format in September 1991.It is held annually at the end of February or early March.