image intensifier

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image

 [im´ahj]
a picture or concept with more or less likeness to an objective reality.
body image see body image.
digital image a depiction recorded electronically to allow viewing or transmission on a computer.
image distributor beam splitter.
disturbed body image a nursing diagnosis defined as confusion in the mental picture of one's personal self. See also body image.
fluoroscopic image a visual depiction on a fluoroscopy screen.
image intensifier a fluoroscope that is electronically enhanced to produce a brighter image; see also automatic brightness control, brightness gain, and vignetting.
latent image the invisible change in radiographic film that is caused by x-radiation or light and is made visible by development of the film.
magnification image direct radiographic enlargement requiring a fractional focus tube of 0.3 mm or less.
manifest image the change on an x-ray film that becomes visible when the latent image undergoes appropriate chemical processing.
mirror image
1. the image of light made visible by the reflecting surface of the cornea and lens when illuminated through the slit lamp.
2. an image with right and left relations reversed, as in the reflection of an object in a mirror.
motor image the organized cerebral model of the possible movements of the body.
phantom image an artifact seen in conventional linear tomography.

im·age am·pli·fi·er

a device for converting a low light level fluoroscopic image to one that can be seen by the eye in a lighted environment; usually consists of an electronic light amplifier chained to a television tube.
Synonym(s): image intensifier

image intensifier

an electronic device used to produce a fluoroscopic image with a low-radiation exposure. A beam of x-rays passing through the patient is converted into a pattern of electrons in a vacuum tube. The electrons are accelerated and concentrated onto a small fluorescent screen, where they present a bright image, which is generally displayed on a video monitor.

image intensifier

A device used in radiology by means of which weak X-ray images obtained by low dosage radiation may be converted into television images and improved in brightness and contrast by purely electronic means. This allows continuous X-ray sceening for various procedures, such as the insertion of arterial catheters, without exposing the patient to unacceptably large doses of radiation.
References in periodicals archive ?
There are two ways to create a digital replacement for image intensifiers, he continued.
The output from the image intensifier enters a chain consisting of lenses, a CCD camera, the image processing system, and the final output onto a monitor.
As the leading supplier of high performance image intensifier technology, ITT is pleased to be associated with Raytheon, the leading supplier of thermal imaging equipment.
This discrepancy between expectation and reality is probably the main reason image intensifiers, which have been around for decades, haven't made a bigger impact on amateur astronomy.
As the foregoing description implies, image intensifiers require a minimum amount of available light to provide users a clear view.
These image intensifiers are spin-offs from spy satellites.
This capability represents an alternative to traditional image intensifiers for several non-gated, low-light applications.
We are now in the third and fourth generation of image intensifiers following the introduction of what are known as channel plates that provide better all-round image resolution.
FONDATION HPITAL SAINT-JOSEPH announced tender for Contract notice: Tender image intensifiers
They were, however, to lead to the development on a large scale of the Image Intensifiers which today represent by far the most widely used infantry night vision systems, of all kinds.