Editing X-ray machine (section)

==History==
The discovery of X-rays came from experimenting with [[Crookes tube]]s, an early experimental electrical discharge tube invented by English physicist [[William Crookes]] around 1869–1875. In 1895, [[Wilhelm Röntgen]] discovered X-rays emanating from Crookes tubes and the many uses for X-rays were immediately apparent. One of the first X-ray photographs was made of the hand of Röntgen's wife. The image displayed both her wedding ring and bones. On January 18, 1896 an ''X-ray machine'' was formally displayed by [[Henry Louis Smith]]. A fully functioning unit was introduced to the public at the [[Louisiana Purchase Exposition#Medical Contributions|1904 World's Fair]] by [[Clarence Madison Dally|Clarence Dally]].<ref>{{Cite web|url=https://www.smithsonianmag.com/history/clarence-dally-the-man-who-gave-thomas-edison-x-ray-vision-123713565/|title=Clarence Dally - The Man Who Gave Thomas Edison X-Ray Vision|last=King|first=Gilbert|date=14 March 2012|website=smithsonianmag.com|access-date=13 November 2016}}</ref> The technology developed quickly: In 1909 [[Mónico Sánchez Moreno]] had produced the first portable medical device and during World War I [[Marie Curie]] led the development of X-ray machines mounted in "radiological cars" to provide mobile X-ray services for military field hospitals.

In the 1940s and 1950s, X-ray machines were used in stores to help sell footwear. These were known as [[Shoe-fitting fluoroscope]]s. However, as the harmful effects of [[X-ray]] [[radiation]] were properly considered, they finally fell out of use. Shoe-fitting use of the device was first banned by the state of [[Pennsylvania]] in 1957. (They were more a clever marketing tool to attract customers, rather than a fitting aid.) Together with [[Robert J. Van de Graaff]], [[John G. Trump]] developed one of the first million-volt X-ray generators.