The seventy-fifth anniversary of Francis Henry William's clinical application of the X-ray.
D005471:Fluoroscopy / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D013902:Radiography, Thoracic / Q000266:history; D011871:Radiology / Q000266:history*; D011878:Radiotherapy / Q000266:history; D014481:United States