sentences:  It was launched in 2012 and is a joint initiative of the European Society of Radiology (ESR), the Radiological Society of North America (RSNA) and the American College of Radiology (ACR).November 8, the day that Wilhelm Conrad Röntgen discovered the existence of x-rays in 1895, was chosen as a day of action and awareness.The theme of Sports Imaging (a sub-specialty of musculoskeletal radiology) has been selected for the 2019 International Day of Radiology.