x-ray tube

An X-ray tube is a vacuum tube that produces X-rays on demand. X-ray tubes are part of X-ray machines. X-rays are part of the electromagnetic spectrum, which extends from radio waves to microwaves, infrared, visible light, ultraviolet, X-rays and gamma rays. The development of X-ray tubes was an important historical event which enabled the field of radiology, for both imaging and treatment applications. Over decades, the development and usefulness of imaging using X-rays encouraged the growth of radiology to encompass radioactive isotope decay (nuclear medicine), nuclear magnetic resonance (MRI) and others. X-rays are also widely used in industrial inspection.
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X-rays (or Röntgen rays) are a form of electromagnetic radiation with a wavelength in the range of 10 to 0.01 nanometers, corresponding to frequencies in the range 30 PHz to 30 EHz. X-rays are primarily used for diagnostic radiography and crystallography. X-rays are a form of ionizing radiation and as such can be dangerous. In many languages it is called Röntgen radiation after one of the first investigators of the X-rays, Wilhelm Conrad Röntgen.
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Noun
1. a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays
(hypernym) tube, vacuum tube, thermionic vacuum tube, thermionic tube, electron tube, thermionic valve
(part-holonym) X-ray machine

A cathode ray tube that focuses energetic streams of electrons on a metal target, causing the metal to emit x-rays .

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