Description: If Wilhelm Conrad Röntgen, the Nobel Prize-winning physicist were alive today, he would most likely heartily approve of this very informative and well-designed site dealing with the detection of medical x-rays. This site was created by the Physics Education Research Group at Kansas State University and it serves as a good introduction to the science behind the discovery and subsequent use of x-rays in a variety of medical settings. The site starts with a brief discussion of Röntgen's initial discovery of x-rays, and then goes on to offer a brief history of radiology. After that, visitors can learn about different detection methods, including the use of fluorescence film. One feature of the site that is most useful is the inclusion of links to other relevant sites that cover such topics as the concept of an x-ray dose and reduction measures. Overall, the site will be very welcome for beginning students of radiology and medical technology.