image intensifier

image intensifier
SYN: image amplifier.

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image in·ten·si·fi·er -in-'ten(t)-sə-.fī(-ə)r n a device used esp. for diagnosis in radiology that provides a more intense image for a given amount of radiation than can be obtained by the usual fluorometric methods
image in·ten·si·fi·ca·tion -in-.ten(t)s-(ə-)fə-'kā-shən n

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an electronic device that provides a TV image from an X-ray source. The X-rays strike a fluorescent screen, giving off electrons, which are accelerated using an electron lens before striking a second fluorescent screen, which is usually attached to a video camera. The acceleration of the electrons amplifies the signal from the original image, giving a brighter picture, so that the radiation dose can be reduced. Images can be taken from the camera to be observed in real time on a video monitor or, using a brief higher-dose exposure, to provide a more detailed static image (see digital spot imaging).

Medical dictionary. 2011.

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Look at other dictionaries:

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