sentences:  Situated near the then border between eastern and western Europe, Vienna was chosen to host all future congresses beginning in 1991.By the late 1980s, the Verein Europaeischer Roentgenkongress, or European Congress of Radiology (ECR), had been founded and a congress-organising institution was established at the Medical University of Vienna, both in support of the biennial meeting.With ECR’91, EAR remained a federation of national societies who sent delegates to the general assembly at the end of every congress.