An X-ray image intensifier (XRII), sometimes referred to as a C-Arm or Fluoroscope in medical settings, is a highly complex piece of equipment which uses x-rays and produces a 'live' image feed which is displayed on a TV screen. The term image intensifier refers to a special component of the machine, which allows low intensity x-rays to be amplified, resulting in a smaller dose to the patient. The overall system consists of an x-ray source, input window, input phosphor, photocathode, vacuum and electron optics, output phosphor and output window. It allows for lower x-ray doses to be used on patients by magnifying the intensity produced in the output image, enabling the viewer to easily see the structure of the object being imaged. They were introduced by Philips in 1955.

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  • An X-ray image intensifier (XRII), sometimes referred to as a C-Arm or Fluoroscope in medical settings, is a highly complex piece of equipment which uses x-rays and produces a 'live' image feed which is displayed on a TV screen. The term image intensifier refers to a special component of the machine, which allows low intensity x-rays to be amplified, resulting in a smaller dose to the patient. The overall system consists of an x-ray source, input window, input phosphor, photocathode, vacuum and electron optics, output phosphor and output window. It allows for lower x-ray doses to be used on patients by magnifying the intensity produced in the output image, enabling the viewer to easily see the structure of the object being imaged. They were introduced by Philips in 1955. (en)
  • Ein Röntgenbildverstärker (RBV) ist ein Bildwandler für Röntgenstrahlen. Ein RBV erzeugt in Echtzeit ein Bild, welches auf einem Monitor angezeigt wird. Er besteht aus einem kalottenförmigen Eingangsschirm, drei bis fünf Elektroden und dem kleineren Ausgangsschirm. Am Eingangsschirm befindet sich ein Szintillator, der bei Eintritt der Röntgenstrahlung Licht erzeugt. Direkt dahinter ist eine Photokathode aufgedampft, an der Elektronen vom eintreffenden Licht freigesetzt werden. Die freien Elektronen werden im elektrischen Feld zwischen Kathode und Anode zur Anode hin beschleunigt. Die Elektroden bilden ein weiteres elektrisches Feld, mit dem man den Weg der Elektronen steuern kann . Vor dem Ausgangsschirm ist wieder ein Szintillator, der die Elektronen sichtbar macht. Es entsteht ein leuchtendes, grünes, auf dem Kopf stehendes Röntgenbild. Meistens wird an den Ausgangsschirm noch eine Optik und eine CCD-Kamera montiert, um das Bild auf dem Bildschirm betrachten zu können. (de)
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  • An X-ray image intensifier (XRII), sometimes referred to as a C-Arm or Fluoroscope in medical settings, is a highly complex piece of equipment which uses x-rays and produces a 'live' image feed which is displayed on a TV screen. The term image intensifier refers to a special component of the machine, which allows low intensity x-rays to be amplified, resulting in a smaller dose to the patient. The overall system consists of an x-ray source, input window, input phosphor, photocathode, vacuum and electron optics, output phosphor and output window. It allows for lower x-ray doses to be used on patients by magnifying the intensity produced in the output image, enabling the viewer to easily see the structure of the object being imaged. They were introduced by Philips in 1955. (en)
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  • X-ray image intensifier (en)
  • Röntgenbildverstärker (de)
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