BBC: Weeks after Wilhelm Röntgen published his discovery of x rays in 1895, the directors of a high school and a hospital in Maastricht, the Netherlands, built their own x-ray imager. Now, more than a century later, Gerrit Kemerink of Maastricht University Medical Center has tested the old device, comparing it with a modern x-ray imager. In a paper to be published in Radiology, Kemerink reports that the old device produces images that are blurrier than those produced by its modern counterpart. Nevertheless, the vintage images are of medically useful quality. They do, however, require the use of radiation doses that are unacceptably high by modern standards.