Grenz ray machine, Germany, 1930-1940
The Grenz ray machine was used for radiation therapy on the skin. It was invented by German radiologist Dr Gustav Bucky (1880-1963), who had discovered Grenz waves (low energy radiation waves) in 1925. Radiation therapy treatment was used extensively during the early 1900s. It involved passing ionising radiation through the body to treat certain skin disorders and conditions such as rheumatism. The Grenz ray machine was made by German company Siemens Reiniger during the 1930s. It was used for superficial skin therapy. This means the rays did not pass deep into the body, but worked on a surface level. Manufacturing details in German, French and English show the machine was intended for European-wide export.
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Glossary: x-ray machine
An X-ray machine is a device used by radiographers to acquire an x-ray image. They are used in various fields, notably medicine and security.
A wave of electromagnetic radiation that has high energy and short wavelength. It is able to pass through many materials, except those of high density such as metals or bones. Discovered in 1895 by William Roentgen.