latent image


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Related to latent image: manifest image

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.

latent image

an invisible image produced in a film emulsion by x-rays or visible light that can be converted into a visible image by development.

la·tent im·age

(lā'tĕnt im'ăj)
The undeveloped image on an exposed x-ray film; it becomes visible after chemical processing.

la·tent im·age

(lā'tĕnt im'ăj)
The undeveloped image on an exposed x-ray film; it becomes visible after chemical processing.

image

the picture reproduced on the x-ray film or by other radioimaging methods such as ultrasonography.

image amplifier system
includes amplifer and viewer or television camera and tape player.
image display modes
see ultrasonography, A-mode, B-mode and M-mode.
image formation
exposure of the film to the x-ray beam ionizing radiation or to other radiant energy forms causes ionic changes in the silver bromide crystals in the film emulsion so that it acquires a silver atom. It is the deposition of reduced silver atoms in particles or zones that causes the black zones or foci on the film. The amount of silver deposited depends on the intensity of the initial radiation x-ray exposure.
image intensification
a technique used to increase the brightness of the image while maintaining its sharpness. Used particularly in fluoroscopy and viewing directly or indirectly through a television camera and monitor, cineradiography, videotape or split-film device.
latent image
the invisible picture on the film after it has been exposed to the x-ray beam. It requires exposure to a developer and fixer before the image is visible and permanent.
weak image
said of x-ray films which lack density due to underexposure, too brief period of development, insufficient developer or developer temperature too low.
References in periodicals archive ?
Other methods used for the purpose currently included the following: In this method the X-rays latent image is first converted to visible light, and then to video signals (via specific camera).
The invention is related to polygraphy, and, in particular, to the production of polymer layers with latent images visible in polarized light that can be used as protective marks on various documents, security papers, banknotes as well as for manufacturing of excise documentary stamps, labels, tags and other products of the kind.
He developed highly sensitive silver halide and dichromated gelatin materials for recording holograms, developing the latent image (LI) method for recording the holographic interference pattern in the photosensitive layers.
Following job completion, a red alert security breach can occur when latent image data remains on the hard disk.
Submitted fingerprints are automatically queried against a latent image database, which has resulted in several new arrests.
This fingerprint biometric technology utilizes a finger's electrical field to sense a live finger, making it impossible to use a replica of a fingerprint or a latent image left on the sensor to authenticate a user.
Contrary to electrophotography with its typical laser or LED-array exposure of photoconductor drums, Nipson's magnetography technology utilizes a state-of-the-art silicon magnetographic imaging head to record a latent image on a revolving hard metal drum.
Planar displays continue to deliver the brightness stability and latent image resistance for which EL has traditionally been known.
The next move is staff members can use a UV lamp to reveal ultraviolet security measures, or check for optically variable ink and latent images.
If needed, staff members can use a UV lamp to reveal ultraviolet security measures, or check for optically variable ink and latent images.
The photographs are supported by essays from the authors on Paris After Dark and The Secret Paris of the 30s, BrassaA and Paris by night, and the latent images of the night.
His intricate line drawing Design for Work II, 1959, with its canny dissembling of an implicit underlying grid through a profusion of curved forms, may reflect the influence of Paul Klee, while certain, more wayward drawings, such as Oja Suite-Monster, 1962, or Yet Another Lease on Life, 1960, recall Surrealism in their apparent automatism as well as in the cultivation of latent images within the apparent one.